""" pySketch A simple object-oriented drawing program. This is completely free software; please feel free to adapt or use this in any way you like. Author: Erik Westra (ewestra@wave.co.nz) ######################################################################### NOTE pySketch requires wxPython version 2.3. If you are running an earlier version, you need to patch your copy of wxPython to fix a bug which will cause the "Edit Text Object" dialog box to crash. To patch an earlier version of wxPython, edit the wxPython/windows.py file, find the wxPyValidator.__init__ method and change the line which reads: self._setSelf(self, wxPyValidator, 0) to: self._setSelf(self, wxPyValidator, 1) This fixes a known bug in wxPython 2.2.5 (and possibly earlier) which has now been fixed in wxPython 2.3. ######################################################################### TODO: * Add ARGV checking to see if a document was double-clicked on. Known Bugs: * Scrolling the window causes the drawing panel to be mucked up until you refresh it. I've got no idea why. * I suspect that the reference counting for some wxPoint objects is getting mucked up; when the user quits, we get errors about being unable to call del on a 'None' object. """ import sys import cPickle, os.path import wx from wx.lib.buttons import GenBitmapButton import traceback, types #---------------------------------------------------------------------------- # System Constants #---------------------------------------------------------------------------- # Our menu item IDs: menu_UNDO = 10001 # Edit menu items. menu_SELECT_ALL = 10002 menu_DUPLICATE = 10003 menu_EDIT_TEXT = 10004 menu_DELETE = 10005 menu_SELECT = 10101 # Tools menu items. menu_LINE = 10102 menu_RECT = 10103 menu_ELLIPSE = 10104 menu_TEXT = 10105 menu_MOVE_FORWARD = 10201 # Object menu items. menu_MOVE_TO_FRONT = 10202 menu_MOVE_BACKWARD = 10203 menu_MOVE_TO_BACK = 10204 menu_ABOUT = 10205 # Help menu items. # Our tool IDs: id_SELECT = 11001 id_LINE = 11002 id_RECT = 11003 id_ELLIPSE = 11004 id_TEXT = 11005 # Our tool option IDs: id_FILL_OPT = 12001 id_PEN_OPT = 12002 id_LINE_OPT = 12003 id_LINESIZE_0 = 13001 id_LINESIZE_1 = 13002 id_LINESIZE_2 = 13003 id_LINESIZE_3 = 13004 id_LINESIZE_4 = 13005 id_LINESIZE_5 = 13006 # DrawObject type IDs: obj_LINE = 1 obj_RECT = 2 obj_ELLIPSE = 3 obj_TEXT = 4 # Selection handle IDs: handle_NONE = 1 handle_TOP_LEFT = 2 handle_TOP_RIGHT = 3 handle_BOTTOM_LEFT = 4 handle_BOTTOM_RIGHT = 5 handle_START_POINT = 6 handle_END_POINT = 7 # Dragging operations: drag_NONE = 1 drag_RESIZE = 2 drag_MOVE = 3 drag_DRAG = 4 # Visual Feedback types: feedback_LINE = 1 feedback_RECT = 2 feedback_ELLIPSE = 3 # Mouse-event action parameter types: param_RECT = 1 param_LINE = 2 # Size of the drawing page, in pixels. PAGE_WIDTH = 1000 PAGE_HEIGHT = 1000 #---------------------------------------------------------------------------- class DrawingFrame(wx.Frame): """ A frame showing the contents of a single document. """ # ========================================== # == Initialisation and Window Management == # ========================================== def __init__(self, parent, id, title, fileName=None): """ Standard constructor. 'parent', 'id' and 'title' are all passed to the standard wx.Frame constructor. 'fileName' is the name and path of a saved file to load into this frame, if any. """ wx.Frame.__init__(self, parent, id, title, style = wx.DEFAULT_FRAME_STYLE | wx.WANTS_CHARS | wx.NO_FULL_REPAINT_ON_RESIZE) # Setup our menu bar. menuBar = wx.MenuBar() self.fileMenu = wx.Menu() self.fileMenu.Append(wx.ID_NEW, "New\tCTRL-N") self.fileMenu.Append(wx.ID_OPEN, "Open...\tCTRL-O") self.fileMenu.Append(wx.ID_CLOSE, "Close\tCTRL-W") self.fileMenu.AppendSeparator() self.fileMenu.Append(wx.ID_SAVE, "Save\tCTRL-S") self.fileMenu.Append(wx.ID_SAVEAS, "Save As...") self.fileMenu.Append(wx.ID_REVERT, "Revert...") self.fileMenu.AppendSeparator() self.fileMenu.Append(wx.ID_EXIT, "Quit\tCTRL-Q") menuBar.Append(self.fileMenu, "File") self.editMenu = wx.Menu() self.editMenu.Append(menu_UNDO, "Undo\tCTRL-Z") self.editMenu.AppendSeparator() self.editMenu.Append(menu_SELECT_ALL, "Select All\tCTRL-A") self.editMenu.AppendSeparator() self.editMenu.Append(menu_DUPLICATE, "Duplicate\tCTRL-D") self.editMenu.Append(menu_EDIT_TEXT, "Edit...\tCTRL-E") self.editMenu.Append(menu_DELETE, "Delete\tDEL") menuBar.Append(self.editMenu, "Edit") self.toolsMenu = wx.Menu() self.toolsMenu.Append(menu_SELECT, "Selection", kind=wx.ITEM_CHECK) self.toolsMenu.Append(menu_LINE, "Line", kind=wx.ITEM_CHECK) self.toolsMenu.Append(menu_RECT, "Rectangle", kind=wx.ITEM_CHECK) self.toolsMenu.Append(menu_ELLIPSE, "Ellipse", kind=wx.ITEM_CHECK) self.toolsMenu.Append(menu_TEXT, "Text", kind=wx.ITEM_CHECK) menuBar.Append(self.toolsMenu, "Tools") self.objectMenu = wx.Menu() self.objectMenu.Append(menu_MOVE_FORWARD, "Move Forward") self.objectMenu.Append(menu_MOVE_TO_FRONT, "Move to Front\tCTRL-F") self.objectMenu.Append(menu_MOVE_BACKWARD, "Move Backward") self.objectMenu.Append(menu_MOVE_TO_BACK, "Move to Back\tCTRL-B") menuBar.Append(self.objectMenu, "Object") self.helpMenu = wx.Menu() self.helpMenu.Append(menu_ABOUT, "About pySketch...") menuBar.Append(self.helpMenu, "Help") self.SetMenuBar(menuBar) # Create our toolbar. tsize = (16,16) self.toolbar = self.CreateToolBar(wx.TB_HORIZONTAL | wx.NO_BORDER | wx.TB_FLAT) self.toolbar.AddSimpleTool(wx.ID_NEW, wx.ArtProvider.GetBitmap(wx.ART_NEW, wx.ART_TOOLBAR, tsize), "New") self.toolbar.AddSimpleTool(wx.ID_OPEN, wx.ArtProvider.GetBitmap(wx.ART_FILE_OPEN, wx.ART_TOOLBAR, tsize), "Open") self.toolbar.AddSimpleTool(wx.ID_SAVE, wx.ArtProvider.GetBitmap(wx.ART_FILE_SAVE, wx.ART_TOOLBAR, tsize), "Save") self.toolbar.AddSeparator() self.toolbar.AddSimpleTool(menu_UNDO, wx.ArtProvider.GetBitmap(wx.ART_UNDO, wx.ART_TOOLBAR, tsize), "Undo") self.toolbar.AddSeparator() self.toolbar.AddSimpleTool(menu_DUPLICATE, wx.Bitmap("images/duplicate.bmp", wx.BITMAP_TYPE_BMP), "Duplicate") self.toolbar.AddSeparator() self.toolbar.AddSimpleTool(menu_MOVE_FORWARD, wx.Bitmap("images/moveForward.bmp", wx.BITMAP_TYPE_BMP), "Move Forward") self.toolbar.AddSimpleTool(menu_MOVE_BACKWARD, wx.Bitmap("images/moveBack.bmp", wx.BITMAP_TYPE_BMP), "Move Backward") self.toolbar.Realize() # Associate each menu/toolbar item with the method that handles that # item. menuHandlers = [ (wx.ID_NEW, self.doNew), (wx.ID_OPEN, self.doOpen), (wx.ID_CLOSE, self.doClose), (wx.ID_SAVE, self.doSave), (wx.ID_SAVEAS, self.doSaveAs), (wx.ID_REVERT, self.doRevert), (wx.ID_EXIT, self.doExit), (menu_UNDO, self.doUndo), (menu_SELECT_ALL, self.doSelectAll), (menu_DUPLICATE, self.doDuplicate), (menu_EDIT_TEXT, self.doEditText), (menu_DELETE, self.doDelete), (menu_SELECT, self.doChooseSelectTool), (menu_LINE, self.doChooseLineTool), (menu_RECT, self.doChooseRectTool), (menu_ELLIPSE, self.doChooseEllipseTool), (menu_TEXT, self.doChooseTextTool), (menu_MOVE_FORWARD, self.doMoveForward), (menu_MOVE_TO_FRONT, self.doMoveToFront), (menu_MOVE_BACKWARD, self.doMoveBackward), (menu_MOVE_TO_BACK, self.doMoveToBack), (menu_ABOUT, self.doShowAbout)] for combo in menuHandlers: id, handler = combo self.Bind(wx.EVT_MENU, handler, id = id) # Install our own method to handle closing the window. This allows us # to ask the user if he/she wants to save before closing the window, as # well as keeping track of which windows are currently open. self.Bind(wx.EVT_CLOSE, self.doClose) # Install our own method for handling keystrokes. We use this to let # the user move the selected object(s) around using the arrow keys. self.Bind(wx.EVT_CHAR_HOOK, self.onKeyEvent) # Setup our top-most panel. This holds the entire contents of the # window, excluding the menu bar. self.topPanel = wx.Panel(self, -1, style=wx.SIMPLE_BORDER) # Setup our tool palette, with all our drawing tools and option icons. self.toolPalette = wx.BoxSizer(wx.VERTICAL) self.selectIcon = ToolPaletteIcon(self.topPanel, id_SELECT, "select", "Selection Tool") self.lineIcon = ToolPaletteIcon(self.topPanel, id_LINE, "line", "Line Tool") self.rectIcon = ToolPaletteIcon(self.topPanel, id_RECT, "rect", "Rectangle Tool") self.ellipseIcon = ToolPaletteIcon(self.topPanel, id_ELLIPSE, "ellipse", "Ellipse Tool") self.textIcon = ToolPaletteIcon(self.topPanel, id_TEXT, "text", "Text Tool") toolSizer = wx.GridSizer(0, 2, 5, 5) toolSizer.Add(self.selectIcon) toolSizer.Add((0, 0)) # Gap to make tool icons line up nicely. toolSizer.Add(self.lineIcon) toolSizer.Add(self.rectIcon) toolSizer.Add(self.ellipseIcon) toolSizer.Add(self.textIcon) self.optionIndicator = ToolOptionIndicator(self.topPanel) self.optionIndicator.SetToolTip( wx.ToolTip("Shows Current Pen/Fill/Line Size Settings")) optionSizer = wx.BoxSizer(wx.HORIZONTAL) self.penOptIcon = ToolPaletteIcon(self.topPanel, id_PEN_OPT, "penOpt", "Set Pen Colour") self.fillOptIcon = ToolPaletteIcon(self.topPanel, id_FILL_OPT, "fillOpt", "Set Fill Colour") self.lineOptIcon = ToolPaletteIcon(self.topPanel, id_LINE_OPT, "lineOpt", "Set Line Size") margin = wx.LEFT | wx.RIGHT optionSizer.Add(self.penOptIcon, 0, margin, 1) optionSizer.Add(self.fillOptIcon, 0, margin, 1) optionSizer.Add(self.lineOptIcon, 0, margin, 1) margin = wx.TOP | wx.LEFT | wx.RIGHT | wx.ALIGN_CENTRE self.toolPalette.Add(toolSizer, 0, margin, 5) self.toolPalette.Add((0, 0), 0, margin, 5) # Spacer. self.toolPalette.Add(self.optionIndicator, 0, margin, 5) self.toolPalette.Add(optionSizer, 0, margin, 5) # Make the tool palette icons respond when the user clicks on them. self.selectIcon.Bind(wx.EVT_BUTTON, self.onToolIconClick) self.lineIcon.Bind(wx.EVT_BUTTON, self.onToolIconClick) self.rectIcon.Bind(wx.EVT_BUTTON, self.onToolIconClick) self.ellipseIcon.Bind(wx.EVT_BUTTON, self.onToolIconClick) self.textIcon.Bind(wx.EVT_BUTTON, self.onToolIconClick) self.penOptIcon.Bind(wx.EVT_BUTTON, self.onPenOptionIconClick) self.fillOptIcon.Bind(wx.EVT_BUTTON, self.onFillOptionIconClick) self.lineOptIcon.Bind(wx.EVT_BUTTON, self.onLineOptionIconClick) # Setup the main drawing area. self.drawPanel = wx.ScrolledWindow(self.topPanel, -1, style=wx.SUNKEN_BORDER) self.drawPanel.SetBackgroundColour(wx.WHITE) self.drawPanel.EnableScrolling(True, True) self.drawPanel.SetScrollbars(20, 20, PAGE_WIDTH / 20, PAGE_HEIGHT / 20) self.drawPanel.Bind(wx.EVT_LEFT_DOWN, self.onMouseEvent) self.drawPanel.Bind(wx.EVT_LEFT_DCLICK, self.onDoubleClickEvent) self.drawPanel.Bind(wx.EVT_RIGHT_DOWN, self.onRightClick) self.drawPanel.Bind(wx.EVT_MOTION, self.onMouseEvent) self.drawPanel.Bind(wx.EVT_LEFT_UP, self.onMouseEvent) self.drawPanel.Bind(wx.EVT_PAINT, self.onPaintEvent) # Position everything in the window. topSizer = wx.BoxSizer(wx.HORIZONTAL) topSizer.Add(self.toolPalette, 0) topSizer.Add(self.drawPanel, 1, wx.EXPAND) self.topPanel.SetAutoLayout(True) self.topPanel.SetSizer(topSizer) self.SetSizeHints(250, 200) self.SetSize(wx.Size(600, 400)) # Select an initial tool. self.curTool = None self._setCurrentTool(self.selectIcon) # Setup our frame to hold the contents of a sketch document. self.dirty = False self.fileName = fileName self.contents = [] # front-to-back ordered list of DrawingObjects. self.selection = [] # List of selected DrawingObjects. self.undoInfo = None # Saved contents for undo. self.dragMode = drag_NONE # Current mouse-drag mode. if self.fileName != None: self.loadContents() self._adjustMenus() # Finally, set our initial pen, fill and line options. self.penColour = wx.BLACK self.fillColour = wx.WHITE self.lineSize = 1 # ============================ # == Event Handling Methods == # ============================ def onToolIconClick(self, event): """ Respond to the user clicking on one of our tool icons. """ iconID = event.GetEventObject().GetId() if iconID == id_SELECT: self.doChooseSelectTool() elif iconID == id_LINE: self.doChooseLineTool() elif iconID == id_RECT: self.doChooseRectTool() elif iconID == id_ELLIPSE: self.doChooseEllipseTool() elif iconID == id_TEXT: self.doChooseTextTool() else: wx.Bell(); print "1" def onPenOptionIconClick(self, event): """ Respond to the user clicking on the "Pen Options" icon. """ data = wx.ColourData() if len(self.selection) == 1: data.SetColour(self.selection[0].getPenColour()) else: data.SetColour(self.penColour) dialog = wx.ColourDialog(self, data) if dialog.ShowModal() == wx.ID_OK: c = dialog.GetColourData().GetColour() self._setPenColour(wx.Colour(c.Red(), c.Green(), c.Blue())) dialog.Destroy() def onFillOptionIconClick(self, event): """ Respond to the user clicking on the "Fill Options" icon. """ data = wx.ColourData() if len(self.selection) == 1: data.SetColour(self.selection[0].getFillColour()) else: data.SetColour(self.fillColour) dialog = wx.ColourDialog(self, data) if dialog.ShowModal() == wx.ID_OK: c = dialog.GetColourData().GetColour() self._setFillColour(wx.Colour(c.Red(), c.Green(), c.Blue())) dialog.Destroy() def onLineOptionIconClick(self, event): """ Respond to the user clicking on the "Line Options" icon. """ if len(self.selection) == 1: menu = self._buildLineSizePopup(self.selection[0].getLineSize()) else: menu = self._buildLineSizePopup(self.lineSize) pos = self.lineOptIcon.GetPosition() pos.y = pos.y + self.lineOptIcon.GetSize().height self.PopupMenu(menu, pos) menu.Destroy() def onKeyEvent(self, event): """ Respond to a keypress event. We make the arrow keys move the selected object(s) by one pixel in the given direction. """ if event.GetKeyCode() == wx.WXK_UP: self._moveObject(0, -1) elif event.GetKeyCode() == wx.WXK_DOWN: self._moveObject(0, 1) elif event.GetKeyCode() == wx.WXK_LEFT: self._moveObject(-1, 0) elif event.GetKeyCode() == wx.WXK_RIGHT: self._moveObject(1, 0) else: event.Skip() def onMouseEvent(self, event): """ Respond to the user clicking on our main drawing panel. How we respond depends on the currently selected tool. """ if not (event.LeftDown() or event.Dragging() or event.LeftUp()): return # Ignore mouse movement without click/drag. if self.curTool == self.selectIcon: feedbackType = feedback_RECT action = self.selectByRectangle actionParam = param_RECT selecting = True dashedLine = True elif self.curTool == self.lineIcon: feedbackType = feedback_LINE action = self.createLine actionParam = param_LINE selecting = False dashedLine = False elif self.curTool == self.rectIcon: feedbackType = feedback_RECT action = self.createRect actionParam = param_RECT selecting = False dashedLine = False elif self.curTool == self.ellipseIcon: feedbackType = feedback_ELLIPSE action = self.createEllipse actionParam = param_RECT selecting = False dashedLine = False elif self.curTool == self.textIcon: feedbackType = feedback_RECT action = self.createText actionParam = param_RECT selecting = False dashedLine = True else: wx.Bell(); print "2" return if event.LeftDown(): mousePt = self._getEventCoordinates(event) if selecting: obj, handle = self._getObjectAndSelectionHandleAt(mousePt) if selecting and (obj != None) and (handle != handle_NONE): # The user clicked on an object's selection handle. Let the # user resize the clicked-on object. self.dragMode = drag_RESIZE self.resizeObject = obj if obj.getType() == obj_LINE: self.resizeFeedback = feedback_LINE pos = obj.getPosition() startPt = wx.Point(pos.x + obj.getStartPt().x, pos.y + obj.getStartPt().y) endPt = wx.Point(pos.x + obj.getEndPt().x, pos.y + obj.getEndPt().y) if handle == handle_START_POINT: self.resizeAnchor = endPt self.resizeFloater = startPt else: self.resizeAnchor = startPt self.resizeFloater = endPt else: self.resizeFeedback = feedback_RECT pos = obj.getPosition() size = obj.getSize() topLeft = wx.Point(pos.x, pos.y) topRight = wx.Point(pos.x + size.width, pos.y) botLeft = wx.Point(pos.x, pos.y + size.height) botRight = wx.Point(pos.x + size.width, pos.y + size.height) if handle == handle_TOP_LEFT: self.resizeAnchor = botRight self.resizeFloater = topLeft elif handle == handle_TOP_RIGHT: self.resizeAnchor = botLeft self.resizeFloater = topRight elif handle == handle_BOTTOM_LEFT: self.resizeAnchor = topRight self.resizeFloater = botLeft elif handle == handle_BOTTOM_RIGHT: self.resizeAnchor = topLeft self.resizeFloater = botRight self.curPt = mousePt self.resizeOffsetX = self.resizeFloater.x - mousePt.x self.resizeOffsetY = self.resizeFloater.y - mousePt.y endPt = wx.Point(self.curPt.x + self.resizeOffsetX, self.curPt.y + self.resizeOffsetY) self._drawVisualFeedback(self.resizeAnchor, endPt, self.resizeFeedback, False) elif selecting and (self._getObjectAt(mousePt) != None): # The user clicked on an object to select it. If the user # drags, he/she will move the object. self.select(self._getObjectAt(mousePt)) self.dragMode = drag_MOVE self.moveOrigin = mousePt self.curPt = mousePt self._drawObjectOutline(0, 0) else: # The user is dragging out a selection rect or new object. self.dragOrigin = mousePt self.curPt = mousePt self.drawPanel.SetCursor(wx.CROSS_CURSOR) self.drawPanel.CaptureMouse() self._drawVisualFeedback(mousePt, mousePt, feedbackType, dashedLine) self.dragMode = drag_DRAG event.Skip() return if event.Dragging(): if self.dragMode == drag_RESIZE: # We're resizing an object. mousePt = self._getEventCoordinates(event) if (self.curPt.x != mousePt.x) or (self.curPt.y != mousePt.y): # Erase previous visual feedback. endPt = wx.Point(self.curPt.x + self.resizeOffsetX, self.curPt.y + self.resizeOffsetY) self._drawVisualFeedback(self.resizeAnchor, endPt, self.resizeFeedback, False) self.curPt = mousePt # Draw new visual feedback. endPt = wx.Point(self.curPt.x + self.resizeOffsetX, self.curPt.y + self.resizeOffsetY) self._drawVisualFeedback(self.resizeAnchor, endPt, self.resizeFeedback, False) elif self.dragMode == drag_MOVE: # We're moving a selected object. mousePt = self._getEventCoordinates(event) if (self.curPt.x != mousePt.x) or (self.curPt.y != mousePt.y): # Erase previous visual feedback. self._drawObjectOutline(self.curPt.x - self.moveOrigin.x, self.curPt.y - self.moveOrigin.y) self.curPt = mousePt # Draw new visual feedback. self._drawObjectOutline(self.curPt.x - self.moveOrigin.x, self.curPt.y - self.moveOrigin.y) elif self.dragMode == drag_DRAG: # We're dragging out a new object or selection rect. mousePt = self._getEventCoordinates(event) if (self.curPt.x != mousePt.x) or (self.curPt.y != mousePt.y): # Erase previous visual feedback. self._drawVisualFeedback(self.dragOrigin, self.curPt, feedbackType, dashedLine) self.curPt = mousePt # Draw new visual feedback. self._drawVisualFeedback(self.dragOrigin, self.curPt, feedbackType, dashedLine) event.Skip() return if event.LeftUp(): if self.dragMode == drag_RESIZE: # We're resizing an object. mousePt = self._getEventCoordinates(event) # Erase last visual feedback. endPt = wx.Point(self.curPt.x + self.resizeOffsetX, self.curPt.y + self.resizeOffsetY) self._drawVisualFeedback(self.resizeAnchor, endPt, self.resizeFeedback, False) resizePt = wx.Point(mousePt.x + self.resizeOffsetX, mousePt.y + self.resizeOffsetY) if (self.resizeFloater.x != resizePt.x) or \ (self.resizeFloater.y != resizePt.y): self._resizeObject(self.resizeObject, self.resizeAnchor, self.resizeFloater, resizePt) else: self.drawPanel.Refresh() # Clean up after empty resize. elif self.dragMode == drag_MOVE: # We're moving a selected object. mousePt = self._getEventCoordinates(event) # Erase last visual feedback. self._drawObjectOutline(self.curPt.x - self.moveOrigin.x, self.curPt.y - self.moveOrigin.y) if (self.moveOrigin.x != mousePt.x) or \ (self.moveOrigin.y != mousePt.y): self._moveObject(mousePt.x - self.moveOrigin.x, mousePt.y - self.moveOrigin.y) else: self.drawPanel.Refresh() # Clean up after empty drag. elif self.dragMode == drag_DRAG: # We're dragging out a new object or selection rect. mousePt = self._getEventCoordinates(event) # Erase last visual feedback. self._drawVisualFeedback(self.dragOrigin, self.curPt, feedbackType, dashedLine) self.drawPanel.ReleaseMouse() self.drawPanel.SetCursor(wx.STANDARD_CURSOR) # Perform the appropriate action for the current tool. if actionParam == param_RECT: x1 = min(self.dragOrigin.x, self.curPt.x) y1 = min(self.dragOrigin.y, self.curPt.y) x2 = max(self.dragOrigin.x, self.curPt.x) y2 = max(self.dragOrigin.y, self.curPt.y) startX = x1 startY = y1 width = x2 - x1 height = y2 - y1 if not selecting: if ((x2-x1) < 8) or ((y2-y1) < 8): return # Too small. action(x1, y1, x2-x1, y2-y1) elif actionParam == param_LINE: action(self.dragOrigin.x, self.dragOrigin.y, self.curPt.x, self.curPt.y) self.dragMode = drag_NONE # We've finished with this mouse event. event.Skip() def onDoubleClickEvent(self, event): """ Respond to a double-click within our drawing panel. """ mousePt = self._getEventCoordinates(event) obj = self._getObjectAt(mousePt) if obj == None: return # Let the user edit the given object. if obj.getType() == obj_TEXT: editor = EditTextObjectDialog(self, "Edit Text Object") editor.objectToDialog(obj) if editor.ShowModal() == wx.ID_CANCEL: editor.Destroy() return self._saveUndoInfo() editor.dialogToObject(obj) editor.Destroy() self.dirty = True self.drawPanel.Refresh() self._adjustMenus() else: wx.Bell(); print "3" def onRightClick(self, event): """ Respond to the user right-clicking within our drawing panel. We select the clicked-on item, if necessary, and display a pop-up menu of available options which can be applied to the selected item(s). """ mousePt = self._getEventCoordinates(event) obj = self._getObjectAt(mousePt) if obj == None: return # Nothing selected. # Select the clicked-on object. self.select(obj) # Build our pop-up menu. menu = wx.Menu() menu.Append(menu_DUPLICATE, "Duplicate") menu.Append(menu_EDIT_TEXT, "Edit...") menu.Append(menu_DELETE, "Delete") menu.AppendSeparator() menu.Append(menu_MOVE_FORWARD, "Move Forward") menu.Append(menu_MOVE_TO_FRONT, "Move to Front") menu.Append(menu_MOVE_BACKWARD, "Move Backward") menu.Append(menu_MOVE_TO_BACK, "Move to Back") menu.Enable(menu_EDIT_TEXT, obj.getType() == obj_TEXT) menu.Enable(menu_MOVE_FORWARD, obj != self.contents[0]) menu.Enable(menu_MOVE_TO_FRONT, obj != self.contents[0]) menu.Enable(menu_MOVE_BACKWARD, obj != self.contents[-1]) menu.Enable(menu_MOVE_TO_BACK, obj != self.contents[-1]) EVT_MENU(self, menu_DUPLICATE, self.doDuplicate) EVT_MENU(self, menu_EDIT_TEXT, self.doEditText) EVT_MENU(self, menu_DELETE, self.doDelete) EVT_MENU(self, menu_MOVE_FORWARD, self.doMoveForward) EVT_MENU(self, menu_MOVE_TO_FRONT, self.doMoveToFront) EVT_MENU(self, menu_MOVE_BACKWARD, self.doMoveBackward) EVT_MENU(self, menu_MOVE_TO_BACK, self.doMoveToBack) # Show the pop-up menu. clickPt = wx.Point(mousePt.x + self.drawPanel.GetPosition().x, mousePt.y + self.drawPanel.GetPosition().y) self.drawPanel.PopupMenu(menu, clickPt) menu.Destroy() def onPaintEvent(self, event): """ Respond to a request to redraw the contents of our drawing panel. """ dc = wx.PaintDC(self.drawPanel) self.drawPanel.PrepareDC(dc) dc.BeginDrawing() for i in range(len(self.contents)-1, -1, -1): obj = self.contents[i] if obj in self.selection: obj.draw(dc, True) else: obj.draw(dc, False) dc.EndDrawing() # ========================== # == Menu Command Methods == # ========================== def doNew(self, event): """ Respond to the "New" menu command. """ global _docList newFrame = DrawingFrame(None, -1, "Untitled") newFrame.Show(True) _docList.append(newFrame) def doOpen(self, event): """ Respond to the "Open" menu command. """ global _docList curDir = os.getcwd() fileName = wx.FileSelector("Open File", default_extension="psk", flags = wx.OPEN | wx.FILE_MUST_EXIST) if fileName == "": return fileName = os.path.join(os.getcwd(), fileName) os.chdir(curDir) title = os.path.basename(fileName) if (self.fileName == None) and (len(self.contents) == 0): # Load contents into current (empty) document. self.fileName = fileName self.SetTitle(os.path.basename(fileName)) self.loadContents() else: # Open a new frame for this document. newFrame = DrawingFrame(None, -1, os.path.basename(fileName), fileName=fileName) newFrame.Show(True) _docList.append(newFrame) def doClose(self, event): """ Respond to the "Close" menu command. """ global _docList if self.dirty: if not self.askIfUserWantsToSave("closing"): return _docList.remove(self) self.Destroy() def doSave(self, event): """ Respond to the "Save" menu command. """ if self.fileName != None: self.saveContents() def doSaveAs(self, event): """ Respond to the "Save As" menu command. """ if self.fileName == None: default = "" else: default = self.fileName curDir = os.getcwd() fileName = wx.FileSelector("Save File As", "Saving", default_filename=default, default_extension="psk", wildcard="*.psk", flags = wx.SAVE | wx.OVERWRITE_PROMPT) if fileName == "": return # User cancelled. fileName = os.path.join(os.getcwd(), fileName) os.chdir(curDir) title = os.path.basename(fileName) self.SetTitle(title) self.fileName = fileName self.saveContents() def doRevert(self, event): """ Respond to the "Revert" menu command. """ if not self.dirty: return if wx.MessageBox("Discard changes made to this document?", "Confirm", style = wx.OK | wx.CANCEL | wx.ICON_QUESTION, parent=self) == wx.CANCEL: return self.loadContents() def doExit(self, event): """ Respond to the "Quit" menu command. """ global _docList, _app for doc in _docList: if not doc.dirty: continue doc.Raise() if not doc.askIfUserWantsToSave("quitting"): return _docList.remove(doc) doc.Destroy() _app.ExitMainLoop() def doUndo(self, event): """ Respond to the "Undo" menu command. """ if self.undoInfo == None: return undoData = self.undoInfo self._saveUndoInfo() # For undoing the undo... self.contents = [] for type, data in undoData["contents"]: obj = DrawingObject(type) obj.setData(data) self.contents.append(obj) self.selection = [] for i in undoData["selection"]: self.selection.append(self.contents[i]) self.dirty = True self.drawPanel.Refresh() self._adjustMenus() def doSelectAll(self, event): """ Respond to the "Select All" menu command. """ self.selectAll() def doDuplicate(self, event): """ Respond to the "Duplicate" menu command. """ self._saveUndoInfo() objs = [] for obj in self.contents: if obj in self.selection: newObj = DrawingObject(obj.getType()) newObj.setData(obj.getData()) pos = obj.getPosition() newObj.setPosition(wx.Point(pos.x + 10, pos.y + 10)) objs.append(newObj) self.contents = objs + self.contents self.selectMany(objs) def doEditText(self, event): """ Respond to the "Edit Text" menu command. """ if len(self.selection) != 1: return obj = self.selection[0] if obj.getType() != obj_TEXT: return editor = EditTextObjectDialog(self, "Edit Text Object") editor.objectToDialog(obj) if editor.ShowModal() == wx.ID_CANCEL: editor.Destroy() return self._saveUndoInfo() editor.dialogToObject(obj) editor.Destroy() self.dirty = True self.drawPanel.Refresh() self._adjustMenus() def doDelete(self, event): """ Respond to the "Delete" menu command. """ self._saveUndoInfo() for obj in self.selection: self.contents.remove(obj) del obj self.deselectAll() def doChooseSelectTool(self, event=None): """ Respond to the "Select Tool" menu command. """ self._setCurrentTool(self.selectIcon) self.drawPanel.SetCursor(wx.STANDARD_CURSOR) self._adjustMenus() def doChooseLineTool(self, event=None): """ Respond to the "Line Tool" menu command. """ self._setCurrentTool(self.lineIcon) self.drawPanel.SetCursor(wx.CROSS_CURSOR) self.deselectAll() self._adjustMenus() def doChooseRectTool(self, event=None): """ Respond to the "Rect Tool" menu command. """ self._setCurrentTool(self.rectIcon) self.drawPanel.SetCursor(wx.CROSS_CURSOR) self.deselectAll() self._adjustMenus() def doChooseEllipseTool(self, event=None): """ Respond to the "Ellipse Tool" menu command. """ self._setCurrentTool(self.ellipseIcon) self.drawPanel.SetCursor(wx.CROSS_CURSOR) self.deselectAll() self._adjustMenus() def doChooseTextTool(self, event=None): """ Respond to the "Text Tool" menu command. """ self._setCurrentTool(self.textIcon) self.drawPanel.SetCursor(wx.CROSS_CURSOR) self.deselectAll() self._adjustMenus() def doMoveForward(self, event): """ Respond to the "Move Forward" menu command. """ if len(self.selection) != 1: return self._saveUndoInfo() obj = self.selection[0] index = self.contents.index(obj) if index == 0: return del self.contents[index] self.contents.insert(index-1, obj) self.drawPanel.Refresh() self._adjustMenus() def doMoveToFront(self, event): """ Respond to the "Move to Front" menu command. """ if len(self.selection) != 1: return self._saveUndoInfo() obj = self.selection[0] self.contents.remove(obj) self.contents.insert(0, obj) self.drawPanel.Refresh() self._adjustMenus() def doMoveBackward(self, event): """ Respond to the "Move Backward" menu command. """ if len(self.selection) != 1: return self._saveUndoInfo() obj = self.selection[0] index = self.contents.index(obj) if index == len(self.contents) - 1: return del self.contents[index] self.contents.insert(index+1, obj) self.drawPanel.Refresh() self._adjustMenus() def doMoveToBack(self, event): """ Respond to the "Move to Back" menu command. """ if len(self.selection) != 1: return self._saveUndoInfo() obj = self.selection[0] self.contents.remove(obj) self.contents.append(obj) self.drawPanel.Refresh() self._adjustMenus() def doShowAbout(self, event): """ Respond to the "About pySketch" menu command. """ dialog = wx.Dialog(self, -1, "About pySketch") # , #style=wx.DIALOG_MODAL | wx.STAY_ON_TOP) dialog.SetBackgroundColour(wx.WHITE) panel = wx.Panel(dialog, -1) panel.SetBackgroundColour(wx.WHITE) panelSizer = wx.BoxSizer(wx.VERTICAL) boldFont = wx.Font(panel.GetFont().GetPointSize(), panel.GetFont().GetFamily(), wx.NORMAL, wx.BOLD) logo = wx.StaticBitmap(panel, -1, wx.Bitmap("images/logo.bmp", wx.BITMAP_TYPE_BMP)) lab1 = wx.StaticText(panel, -1, "pySketch") lab1.SetFont(wx.Font(36, boldFont.GetFamily(), wx.ITALIC, wx.BOLD)) lab1.SetSize(lab1.GetBestSize()) imageSizer = wx.BoxSizer(wx.HORIZONTAL) imageSizer.Add(logo, 0, wx.ALL | wx.ALIGN_CENTRE_VERTICAL, 5) imageSizer.Add(lab1, 0, wx.ALL | wx.ALIGN_CENTRE_VERTICAL, 5) lab2 = wx.StaticText(panel, -1, "A simple object-oriented drawing " + \ "program.") lab2.SetFont(boldFont) lab2.SetSize(lab2.GetBestSize()) lab3 = wx.StaticText(panel, -1, "pySketch is completely free " + \ "software; please") lab3.SetFont(boldFont) lab3.SetSize(lab3.GetBestSize()) lab4 = wx.StaticText(panel, -1, "feel free to adapt or use this " + \ "in any way you like.") lab4.SetFont(boldFont) lab4.SetSize(lab4.GetBestSize()) lab5 = wx.StaticText(panel, -1, "Author: Erik Westra " + \ "(ewestra@wave.co.nz)") lab5.SetFont(boldFont) lab5.SetSize(lab5.GetBestSize()) btnOK = wx.Button(panel, wx.ID_OK, "OK") panelSizer.Add(imageSizer, 0, wx.ALIGN_CENTRE) panelSizer.Add((10, 10)) # Spacer. panelSizer.Add(lab2, 0, wx.ALIGN_CENTRE) panelSizer.Add((10, 10)) # Spacer. panelSizer.Add(lab3, 0, wx.ALIGN_CENTRE) panelSizer.Add(lab4, 0, wx.ALIGN_CENTRE) panelSizer.Add((10, 10)) # Spacer. panelSizer.Add(lab5, 0, wx.ALIGN_CENTRE) panelSizer.Add((10, 10)) # Spacer. panelSizer.Add(btnOK, 0, wx.ALL | wx.ALIGN_CENTRE, 5) panel.SetAutoLayout(True) panel.SetSizer(panelSizer) panelSizer.Fit(panel) topSizer = wx.BoxSizer(wx.HORIZONTAL) topSizer.Add(panel, 0, wx.ALL, 10) dialog.SetAutoLayout(True) dialog.SetSizer(topSizer) topSizer.Fit(dialog) dialog.Centre() btn = dialog.ShowModal() dialog.Destroy() # ============================= # == Object Creation Methods == # ============================= def createLine(self, x1, y1, x2, y2): """ Create a new line object at the given position and size. """ self._saveUndoInfo() topLeftX = min(x1, x2) topLeftY = min(y1, y2) botRightX = max(x1, x2) botRightY = max(y1, y2) obj = DrawingObject(obj_LINE, position=wx.Point(topLeftX, topLeftY), size=wx.Size(botRightX-topLeftX, botRightY-topLeftY), penColour=self.penColour, fillColour=self.fillColour, lineSize=self.lineSize, startPt = wx.Point(x1 - topLeftX, y1 - topLeftY), endPt = wx.Point(x2 - topLeftX, y2 - topLeftY)) self.contents.insert(0, obj) self.dirty = True self.doChooseSelectTool() self.select(obj) def createRect(self, x, y, width, height): """ Create a new rectangle object at the given position and size. """ self._saveUndoInfo() obj = DrawingObject(obj_RECT, position=wx.Point(x, y), size=wx.Size(width, height), penColour=self.penColour, fillColour=self.fillColour, lineSize=self.lineSize) self.contents.insert(0, obj) self.dirty = True self.doChooseSelectTool() self.select(obj) def createEllipse(self, x, y, width, height): """ Create a new ellipse object at the given position and size. """ self._saveUndoInfo() obj = DrawingObject(obj_ELLIPSE, position=wx.Point(x, y), size=wx.Size(width, height), penColour=self.penColour, fillColour=self.fillColour, lineSize=self.lineSize) self.contents.insert(0, obj) self.dirty = True self.doChooseSelectTool() self.select(obj) def createText(self, x, y, width, height): """ Create a new text object at the given position and size. """ editor = EditTextObjectDialog(self, "Create Text Object") if editor.ShowModal() == wx.ID_CANCEL: editor.Destroy() return self._saveUndoInfo() obj = DrawingObject(obj_TEXT, position=wx.Point(x, y), size=wx.Size(width, height)) editor.dialogToObject(obj) editor.Destroy() self.contents.insert(0, obj) self.dirty = True self.doChooseSelectTool() self.select(obj) # ======================= # == Selection Methods == # ======================= def selectAll(self): """ Select every DrawingObject in our document. """ self.selection = [] for obj in self.contents: self.selection.append(obj) self.drawPanel.Refresh() self._adjustMenus() def deselectAll(self): """ Deselect every DrawingObject in our document. """ self.selection = [] self.drawPanel.Refresh() self._adjustMenus() def select(self, obj): """ Select the given DrawingObject within our document. """ self.selection = [obj] self.drawPanel.Refresh() self._adjustMenus() def selectMany(self, objs): """ Select the given list of DrawingObjects. """ self.selection = objs self.drawPanel.Refresh() self._adjustMenus() def selectByRectangle(self, x, y, width, height): """ Select every DrawingObject in the given rectangular region. """ self.selection = [] for obj in self.contents: if obj.objectWithinRect(x, y, width, height): self.selection.append(obj) self.drawPanel.Refresh() self._adjustMenus() # ====================== # == File I/O Methods == # ====================== def loadContents(self): """ Load the contents of our document into memory. """ f = open(self.fileName, "rb") objData = cPickle.load(f) f.close() for type, data in objData: obj = DrawingObject(type) obj.setData(data) self.contents.append(obj) self.dirty = False self.selection = [] self.undoInfo = None self.drawPanel.Refresh() self._adjustMenus() def saveContents(self): """ Save the contents of our document to disk. """ objData = [] for obj in self.contents: objData.append([obj.getType(), obj.getData()]) f = open(self.fileName, "wb") cPickle.dump(objData, f) f.close() self.dirty = False def askIfUserWantsToSave(self, action): """ Give the user the opportunity to save the current document. 'action' is a string describing the action about to be taken. If the user wants to save the document, it is saved immediately. If the user cancels, we return False. """ if not self.dirty: return True # Nothing to do. response = wx.MessageBox("Save changes before " + action + "?", "Confirm", wx.YES_NO | wx.CANCEL, self) if response == wx.YES: if self.fileName == None: fileName = wx.FileSelector("Save File As", "Saving", default_extension="psk", wildcard="*.psk", flags = wx.SAVE | wx.OVERWRITE_PROMPT) if fileName == "": return False # User cancelled. self.fileName = fileName self.saveContents() return True elif response == wx.NO: return True # User doesn't want changes saved. elif response == wx.CANCEL: return False # User cancelled. # ===================== # == Private Methods == # ===================== def _adjustMenus(self): """ Adjust our menus and toolbar to reflect the current state of the world. """ canSave = (self.fileName != None) and self.dirty canRevert = (self.fileName != None) and self.dirty canUndo = self.undoInfo != None selection = len(self.selection) > 0 onlyOne = len(self.selection) == 1 isText = onlyOne and (self.selection[0].getType() == obj_TEXT) front = onlyOne and (self.selection[0] == self.contents[0]) back = onlyOne and (self.selection[0] == self.contents[-1]) # Enable/disable our menu items. self.fileMenu.Enable(wx.ID_SAVE, canSave) self.fileMenu.Enable(wx.ID_REVERT, canRevert) self.editMenu.Enable(menu_UNDO, canUndo) self.editMenu.Enable(menu_DUPLICATE, selection) self.editMenu.Enable(menu_EDIT_TEXT, isText) self.editMenu.Enable(menu_DELETE, selection) self.toolsMenu.Check(menu_SELECT, self.curTool == self.selectIcon) self.toolsMenu.Check(menu_LINE, self.curTool == self.lineIcon) self.toolsMenu.Check(menu_RECT, self.curTool == self.rectIcon) self.toolsMenu.Check(menu_ELLIPSE, self.curTool == self.ellipseIcon) self.toolsMenu.Check(menu_TEXT, self.curTool == self.textIcon) self.objectMenu.Enable(menu_MOVE_FORWARD, onlyOne and not front) self.objectMenu.Enable(menu_MOVE_TO_FRONT, onlyOne and not front) self.objectMenu.Enable(menu_MOVE_BACKWARD, onlyOne and not back) self.objectMenu.Enable(menu_MOVE_TO_BACK, onlyOne and not back) # Enable/disable our toolbar icons. self.toolbar.EnableTool(wx.ID_NEW, True) self.toolbar.EnableTool(wx.ID_OPEN, True) self.toolbar.EnableTool(wx.ID_SAVE, canSave) self.toolbar.EnableTool(menu_UNDO, canUndo) self.toolbar.EnableTool(menu_DUPLICATE, selection) self.toolbar.EnableTool(menu_MOVE_FORWARD, onlyOne and not front) self.toolbar.EnableTool(menu_MOVE_BACKWARD, onlyOne and not back) def _setCurrentTool(self, newToolIcon): """ Set the currently selected tool. """ if self.curTool == newToolIcon: return # Nothing to do. if self.curTool != None: self.curTool.deselect() newToolIcon.select() self.curTool = newToolIcon def _setPenColour(self, colour): """ Set the default or selected object's pen colour. """ if len(self.selection) > 0: self._saveUndoInfo() for obj in self.selection: obj.setPenColour(colour) self.drawPanel.Refresh() else: self.penColour = colour self.optionIndicator.setPenColour(colour) def _setFillColour(self, colour): """ Set the default or selected object's fill colour. """ if len(self.selection) > 0: self._saveUndoInfo() for obj in self.selection: obj.setFillColour(colour) self.drawPanel.Refresh() else: self.fillColour = colour self.optionIndicator.setFillColour(colour) def _setLineSize(self, size): """ Set the default or selected object's line size. """ if len(self.selection) > 0: self._saveUndoInfo() for obj in self.selection: obj.setLineSize(size) self.drawPanel.Refresh() else: self.lineSize = size self.optionIndicator.setLineSize(size) def _saveUndoInfo(self): """ Remember the current state of the document, to allow for undo. We make a copy of the document's contents, so that we can return to the previous contents if the user does something and then wants to undo the operation. """ savedContents = [] for obj in self.contents: savedContents.append([obj.getType(), obj.getData()]) savedSelection = [] for i in range(len(self.contents)): if self.contents[i] in self.selection: savedSelection.append(i) self.undoInfo = {"contents" : savedContents, "selection" : savedSelection} def _resizeObject(self, obj, anchorPt, oldPt, newPt): """ Resize the given object. 'anchorPt' is the unchanging corner of the object, while the opposite corner has been resized. 'oldPt' are the current coordinates for this corner, while 'newPt' are the new coordinates. The object should fit within the given dimensions, though if the new point is less than the anchor point the object will need to be moved as well as resized, to avoid giving it a negative size. """ if obj.getType() == obj_TEXT: # Not allowed to resize text objects -- they're sized to fit text. wx.Bell(); print "4" return self._saveUndoInfo() topLeft = wx.Point(min(anchorPt.x, newPt.x), min(anchorPt.y, newPt.y)) botRight = wx.Point(max(anchorPt.x, newPt.x), max(anchorPt.y, newPt.y)) newWidth = botRight.x - topLeft.x newHeight = botRight.y - topLeft.y if obj.getType() == obj_LINE: # Adjust the line so that its start and end points match the new # overall object size. startPt = obj.getStartPt() endPt = obj.getEndPt() slopesDown = ((startPt.x < endPt.x) and (startPt.y < endPt.y)) or \ ((startPt.x > endPt.x) and (startPt.y > endPt.y)) # Handle the user flipping the line. hFlip = ((anchorPt.x < oldPt.x) and (anchorPt.x > newPt.x)) or \ ((anchorPt.x > oldPt.x) and (anchorPt.x < newPt.x)) vFlip = ((anchorPt.y < oldPt.y) and (anchorPt.y > newPt.y)) or \ ((anchorPt.y > oldPt.y) and (anchorPt.y < newPt.y)) if (hFlip and not vFlip) or (vFlip and not hFlip): slopesDown = not slopesDown # Line flipped. if slopesDown: obj.setStartPt(wx.Point(0, 0)) obj.setEndPt(wx.Point(newWidth, newHeight)) else: obj.setStartPt(wx.Point(0, newHeight)) obj.setEndPt(wx.Point(newWidth, 0)) # Finally, adjust the bounds of the object to match the new dimensions. obj.setPosition(topLeft) obj.setSize(wx.Size(botRight.x - topLeft.x, botRight.y - topLeft.y)) self.drawPanel.Refresh() def _moveObject(self, offsetX, offsetY): """ Move the currently selected object(s) by the given offset. """ self._saveUndoInfo() for obj in self.selection: pos = obj.getPosition() pos.x = pos.x + offsetX pos.y = pos.y + offsetY obj.setPosition(pos) self.drawPanel.Refresh() def _buildLineSizePopup(self, lineSize): """ Build the pop-up menu used to set the line size. 'lineSize' is the current line size value. The corresponding item is checked in the pop-up menu. """ menu = wx.Menu() menu.Append(id_LINESIZE_0, "no line", kind=wx.ITEM_CHECK) menu.Append(id_LINESIZE_1, "1-pixel line", kind=wx.ITEM_CHECK) menu.Append(id_LINESIZE_2, "2-pixel line", kind=wx.ITEM_CHECK) menu.Append(id_LINESIZE_3, "3-pixel line", kind=wx.ITEM_CHECK) menu.Append(id_LINESIZE_4, "4-pixel line", kind=wx.ITEM_CHECK) menu.Append(id_LINESIZE_5, "5-pixel line", kind=wx.ITEM_CHECK) if lineSize == 0: menu.Check(id_LINESIZE_0, True) elif lineSize == 1: menu.Check(id_LINESIZE_1, True) elif lineSize == 2: menu.Check(id_LINESIZE_2, True) elif lineSize == 3: menu.Check(id_LINESIZE_3, True) elif lineSize == 4: menu.Check(id_LINESIZE_4, True) elif lineSize == 5: menu.Check(id_LINESIZE_5, True) self.Bind(wx.EVT_MENU, self._lineSizePopupSelected, id=id_LINESIZE_0, id2=id_LINESIZE_5) return menu def _lineSizePopupSelected(self, event): """ Respond to the user selecting an item from the line size popup menu """ id = event.GetId() if id == id_LINESIZE_0: self._setLineSize(0) elif id == id_LINESIZE_1: self._setLineSize(1) elif id == id_LINESIZE_2: self._setLineSize(2) elif id == id_LINESIZE_3: self._setLineSize(3) elif id == id_LINESIZE_4: self._setLineSize(4) elif id == id_LINESIZE_5: self._setLineSize(5) else: wx.Bell(); print "5" return self.optionIndicator.setLineSize(self.lineSize) def _getEventCoordinates(self, event): """ Return the coordinates associated with the given mouse event. The coordinates have to be adjusted to allow for the current scroll position. """ originX, originY = self.drawPanel.GetViewStart() unitX, unitY = self.drawPanel.GetScrollPixelsPerUnit() return wx.Point(event.GetX() + (originX * unitX), event.GetY() + (originY * unitY)) def _getObjectAndSelectionHandleAt(self, pt): """ Return the object and selection handle at the given point. We draw selection handles (small rectangles) around the currently selected object(s). If the given point is within one of the selection handle rectangles, we return the associated object and a code indicating which selection handle the point is in. If the point isn't within any selection handle at all, we return the tuple (None, handle_NONE). """ for obj in self.selection: handle = obj.getSelectionHandleContainingPoint(pt.x, pt.y) if handle != handle_NONE: return obj, handle return None, handle_NONE def _getObjectAt(self, pt): """ Return the first object found which is at the given point. """ for obj in self.contents: if obj.objectContainsPoint(pt.x, pt.y): return obj return None def _drawObjectOutline(self, offsetX, offsetY): """ Draw an outline of the currently selected object. The selected object's outline is drawn at the object's position plus the given offset. Note that the outline is drawn by *inverting* the window's contents, so calling _drawObjectOutline twice in succession will restore the window's contents back to what they were previously. """ if len(self.selection) != 1: return position = self.selection[0].getPosition() size = self.selection[0].getSize() dc = wx.ClientDC(self.drawPanel) self.drawPanel.PrepareDC(dc) dc.BeginDrawing() dc.SetPen(wx.BLACK_DASHED_PEN) dc.SetBrush(wx.TRANSPARENT_BRUSH) dc.SetLogicalFunction(wx.INVERT) dc.DrawRectangle(position.x + offsetX, position.y + offsetY, size.width, size.height) dc.EndDrawing() def _drawVisualFeedback(self, startPt, endPt, type, dashedLine): """ Draw visual feedback for a drawing operation. The visual feedback consists of a line, ellipse, or rectangle based around the two given points. 'type' should be one of the following predefined feedback type constants: feedback_RECT -> draw rectangular feedback. feedback_LINE -> draw line feedback. feedback_ELLIPSE -> draw elliptical feedback. if 'dashedLine' is True, the feedback is drawn as a dashed rather than a solid line. Note that the feedback is drawn by *inverting* the window's contents, so calling _drawVisualFeedback twice in succession will restore the window's contents back to what they were previously. """ dc = wx.ClientDC(self.drawPanel) self.drawPanel.PrepareDC(dc) dc.BeginDrawing() if dashedLine: dc.SetPen(wx.BLACK_DASHED_PEN) else: dc.SetPen(wx.BLACK_PEN) dc.SetBrush(wx.TRANSPARENT_BRUSH) dc.SetLogicalFunction(wx.INVERT) if type == feedback_RECT: dc.DrawRectangle(startPt.x, startPt.y, endPt.x - startPt.x, endPt.y - startPt.y) elif type == feedback_LINE: dc.DrawLine(startPt.x, startPt.y, endPt.x, endPt.y) elif type == feedback_ELLIPSE: dc.DrawEllipse(startPt.x, startPt.y, endPt.x - startPt.x, endPt.y - startPt.y) dc.EndDrawing() #---------------------------------------------------------------------------- class DrawingObject: """ An object within the drawing panel. A pySketch document consists of a front-to-back ordered list of DrawingObjects. Each DrawingObject has the following properties: 'type' What type of object this is (text, line, etc). 'position' The position of the object within the document. 'size' The size of the object within the document. 'penColour' The colour to use for drawing the object's outline. 'fillColour' Colour to use for drawing object's interior. 'lineSize' Line width (in pixels) to use for object's outline. 'startPt' The point, relative to the object's position, where an obj_LINE object's line should start. 'endPt' The point, relative to the object's position, where an obj_LINE object's line should end. 'text' The object's text (obj_TEXT objects only). 'textFont' The text object's font name. 'textSize' The text object's point size. 'textBoldface' If True, this text object will be drawn in boldface. 'textItalic' If True, this text object will be drawn in italic. 'textUnderline' If True, this text object will be drawn underlined. """ # ================== # == Constructors == # ================== def __init__(self, type, position=wx.Point(0, 0), size=wx.Size(0, 0), penColour=wx.BLACK, fillColour=wx.WHITE, lineSize=1, text=None, startPt=wx.Point(0, 0), endPt=wx.Point(0,0)): """ Standard constructor. 'type' is the type of object being created. This should be one of the following constants: obj_LINE obj_RECT obj_ELLIPSE obj_TEXT The remaining parameters let you set various options for the newly created DrawingObject. """ self.type = type self.position = position self.size = size self.penColour = penColour self.fillColour = fillColour self.lineSize = lineSize self.startPt = startPt self.endPt = endPt self.text = text self.textFont = wx.SystemSettings_GetFont( wx.SYS_DEFAULT_GUI_FONT).GetFaceName() self.textSize = 12 self.textBoldface = False self.textItalic = False self.textUnderline = False # ============================= # == Object Property Methods == # ============================= def getData(self): """ Return a copy of the object's internal data. This is used to save this DrawingObject to disk. """ return [self.type, self.position.x, self.position.y, self.size.width, self.size.height, self.penColour.Red(), self.penColour.Green(), self.penColour.Blue(), self.fillColour.Red(), self.fillColour.Green(), self.fillColour.Blue(), self.lineSize, self.startPt.x, self.startPt.y, self.endPt.x, self.endPt.y, self.text, self.textFont, self.textSize, self.textBoldface, self.textItalic, self.textUnderline] def setData(self, data): """ Set the object's internal data. 'data' is a copy of the object's saved data, as returned by getData() above. This is used to restore a previously saved DrawingObject. """ #data = copy.deepcopy(data) # Needed? self.type = data[0] self.position = wx.Point(data[1], data[2]) self.size = wx.Size(data[3], data[4]) self.penColour = wx.Colour(red=data[5], green=data[6], blue=data[7]) self.fillColour = wx.Colour(red=data[8], green=data[9], blue=data[10]) self.lineSize = data[11] self.startPt = wx.Point(data[12], data[13]) self.endPt = wx.Point(data[14], data[15]) self.text = data[16] self.textFont = data[17] self.textSize = data[18] self.textBoldface = data[19] self.textItalic = data[20] self.textUnderline = data[21] def getType(self): """ Return this DrawingObject's type. """ return self.type def setPosition(self, position): """ Set the origin (top-left corner) for this DrawingObject. """ self.position = position def getPosition(self): """ Return this DrawingObject's position. """ return self.position def setSize(self, size): """ Set the size for this DrawingObject. """ self.size = size def getSize(self): """ Return this DrawingObject's size. """ return self.size def setPenColour(self, colour): """ Set the pen colour used for this DrawingObject. """ self.penColour = colour def getPenColour(self): """ Return this DrawingObject's pen colour. """ return self.penColour def setFillColour(self, colour): """ Set the fill colour used for this DrawingObject. """ self.fillColour = colour def getFillColour(self): """ Return this DrawingObject's fill colour. """ return self.fillColour def setLineSize(self, lineSize): """ Set the linesize used for this DrawingObject. """ self.lineSize = lineSize def getLineSize(self): """ Return this DrawingObject's line size. """ return self.lineSize def setStartPt(self, startPt): """ Set the starting point for this line DrawingObject. """ self.startPt = startPt def getStartPt(self): """ Return the starting point for this line DrawingObject. """ return self.startPt def setEndPt(self, endPt): """ Set the ending point for this line DrawingObject. """ self.endPt = endPt def getEndPt(self): """ Return the ending point for this line DrawingObject. """ return self.endPt def setText(self, text): """ Set the text for this DrawingObject. """ self.text = text def getText(self): """ Return this DrawingObject's text. """ return self.text def setTextFont(self, font): """ Set the typeface for this text DrawingObject. """ self.textFont = font def getTextFont(self): """ Return this text DrawingObject's typeface. """ return self.textFont def setTextSize(self, size): """ Set the point size for this text DrawingObject. """ self.textSize = size def getTextSize(self): """ Return this text DrawingObject's text size. """ return self.textSize def setTextBoldface(self, boldface): """ Set the boldface flag for this text DrawingObject. """ self.textBoldface = boldface def getTextBoldface(self): """ Return this text DrawingObject's boldface flag. """ return self.textBoldface def setTextItalic(self, italic): """ Set the italic flag for this text DrawingObject. """ self.textItalic = italic def getTextItalic(self): """ Return this text DrawingObject's italic flag. """ return self.textItalic def setTextUnderline(self, underline): """ Set the underling flag for this text DrawingObject. """ self.textUnderline = underline def getTextUnderline(self): """ Return this text DrawingObject's underline flag. """ return self.textUnderline # ============================ # == Object Drawing Methods == # ============================ def draw(self, dc, selected): """ Draw this DrawingObject into our window. 'dc' is the device context to use for drawing. If 'selected' is True, the object is currently selected and should be drawn as such. """ if self.type != obj_TEXT: if self.lineSize == 0: dc.SetPen(wx.Pen(self.penColour, self.lineSize, wx.TRANSPARENT)) else: dc.SetPen(wx.Pen(self.penColour, self.lineSize, wx.SOLID)) dc.SetBrush(wx.Brush(self.fillColour, wx.SOLID)) else: dc.SetTextForeground(self.penColour) dc.SetTextBackground(self.fillColour) self._privateDraw(dc, self.position, selected) # ======================= # == Selection Methods == # ======================= def objectContainsPoint(self, x, y): """ Returns True iff this object contains the given point. This is used to determine if the user clicked on the object. """ # Firstly, ignore any points outside of the object's bounds. if x < self.position.x: return False if x > self.position.x + self.size.x: return False if y < self.position.y: return False if y > self.position.y + self.size.y: return False if self.type in [obj_RECT, obj_TEXT]: # Rectangles and text are easy -- they're always selected if the # point is within their bounds. return True # Now things get tricky. There's no straightforward way of knowing # whether the point is within the object's bounds...to get around this, # we draw the object into a memory-based bitmap and see if the given # point was drawn. This could no doubt be done more efficiently by # some tricky maths, but this approach works and is simple enough. bitmap = wx.EmptyBitmap(self.size.x + 10, self.size.y + 10) dc = wx.MemoryDC() dc.SelectObject(bitmap) dc.BeginDrawing() dc.SetBackground(wx.WHITE_BRUSH) dc.Clear() dc.SetPen(wx.Pen(wx.BLACK, self.lineSize + 5, wx.SOLID)) dc.SetBrush(wx.BLACK_BRUSH) self._privateDraw(dc, wx.Point(5, 5), True) dc.EndDrawing() pixel = dc.GetPixel(x - self.position.x + 5, y - self.position.y + 5) if (pixel.Red() == 0) and (pixel.Green() == 0) and (pixel.Blue() == 0): return True else: return False def getSelectionHandleContainingPoint(self, x, y): """ Return the selection handle containing the given point, if any. We return one of the predefined selection handle ID codes. """ if self.type == obj_LINE: # We have selection handles at the start and end points. if self._pointInSelRect(x, y, self.position.x + self.startPt.x, self.position.y + self.startPt.y): return handle_START_POINT elif self._pointInSelRect(x, y, self.position.x + self.endPt.x, self.position.y + self.endPt.y): return handle_END_POINT else: return handle_NONE else: # We have selection handles at all four corners. if self._pointInSelRect(x, y, self.position.x, self.position.y): return handle_TOP_LEFT elif self._pointInSelRect(x, y, self.position.x + self.size.width, self.position.y): return handle_TOP_RIGHT elif self._pointInSelRect(x, y, self.position.x, self.position.y + self.size.height): return handle_BOTTOM_LEFT elif self._pointInSelRect(x, y, self.position.x + self.size.width, self.position.y + self.size.height): return handle_BOTTOM_RIGHT else: return handle_NONE def objectWithinRect(self, x, y, width, height): """ Return True iff this object falls completely within the given rect. """ if x > self.position.x: return False if x + width < self.position.x + self.size.width: return False if y > self.position.y: return False if y + height < self.position.y + self.size.height: return False return True # ===================== # == Utility Methods == # ===================== def fitToText(self): """ Resize a text DrawingObject so that it fits it's text exactly. """ if self.type != obj_TEXT: return if self.textBoldface: weight = wx.BOLD else: weight = wx.NORMAL if self.textItalic: style = wx.ITALIC else: style = wx.NORMAL font = wx.Font(self.textSize, wx.DEFAULT, style, weight, self.textUnderline, self.textFont) dummyWindow = wx.Frame(None, -1, "") dummyWindow.SetFont(font) width, height = dummyWindow.GetTextExtent(self.text) dummyWindow.Destroy() self.size = wx.Size(width, height) # ===================== # == Private Methods == # ===================== def _privateDraw(self, dc, position, selected): """ Private routine to draw this DrawingObject. 'dc' is the device context to use for drawing, while 'position' is the position in which to draw the object. If 'selected' is True, the object is drawn with selection handles. This private drawing routine assumes that the pen and brush have already been set by the caller. """ if self.type == obj_LINE: dc.DrawLine(position.x + self.startPt.x, position.y + self.startPt.y, position.x + self.endPt.x, position.y + self.endPt.y) elif self.type == obj_RECT: dc.DrawRectangle(position.x, position.y, self.size.width, self.size.height) elif self.type == obj_ELLIPSE: dc.DrawEllipse(position.x, position.y, self.size.width, self.size.height) elif self.type == obj_TEXT: if self.textBoldface: weight = wx.BOLD else: weight = wx.NORMAL if self.textItalic: style = wx.ITALIC else: style = wx.NORMAL font = wx.Font(self.textSize, wx.DEFAULT, style, weight, self.textUnderline, self.textFont) dc.SetFont(font) dc.DrawText(self.text, position.x, position.y) if selected: dc.SetPen(wx.TRANSPARENT_PEN) dc.SetBrush(wx.BLACK_BRUSH) if self.type == obj_LINE: # Draw selection handles at the start and end points. self._drawSelHandle(dc, position.x + self.startPt.x, position.y + self.startPt.y) self._drawSelHandle(dc, position.x + self.endPt.x, position.y + self.endPt.y) else: # Draw selection handles at all four corners. self._drawSelHandle(dc, position.x, position.y) self._drawSelHandle(dc, position.x + self.size.width, position.y) self._drawSelHandle(dc, position.x, position.y + self.size.height) self._drawSelHandle(dc, position.x + self.size.width, position.y + self.size.height) def _drawSelHandle(self, dc, x, y): """ Draw a selection handle around this DrawingObject. 'dc' is the device context to draw the selection handle within, while 'x' and 'y' are the coordinates to use for the centre of the selection handle. """ dc.DrawRectangle(x - 3, y - 3, 6, 6) def _pointInSelRect(self, x, y, rX, rY): """ Return True iff (x, y) is within the selection handle at (rX, ry). """ if x < rX - 3: return False elif x > rX + 3: return False elif y < rY - 3: return False elif y > rY + 3: return False else: return True #---------------------------------------------------------------------------- class ToolPaletteIcon(GenBitmapButton): """ An icon appearing in the tool palette area of our sketching window. Note that this is actually implemented as a wx.Bitmap rather than as a wx.Icon. wx.Icon has a very specific meaning, and isn't appropriate for this more general use. """ def __init__(self, parent, iconID, iconName, toolTip): """ Standard constructor. 'parent' is the parent window this icon will be part of. 'iconID' is the internal ID used for this icon. 'iconName' is the name used for this icon. 'toolTip' is the tool tip text to show for this icon. The icon name is used to get the appropriate bitmap for this icon. """ bmp = wx.Bitmap("images/" + iconName + "Icon.bmp", wx.BITMAP_TYPE_BMP) GenBitmapButton.__init__(self, parent, iconID, bmp, wx.DefaultPosition, wx.Size(bmp.GetWidth(), bmp.GetHeight())) self.SetToolTip(wx.ToolTip(toolTip)) self.iconID = iconID self.iconName = iconName self.isSelected = False def select(self): """ Select the icon. The icon's visual representation is updated appropriately. """ if self.isSelected: return # Nothing to do! bmp = wx.Bitmap("images/" + self.iconName + "IconSel.bmp", wx.BITMAP_TYPE_BMP) self.SetBitmapLabel(bmp) self.isSelected = True def deselect(self): """ Deselect the icon. The icon's visual representation is updated appropriately. """ if not self.isSelected: return # Nothing to do! bmp = wx.Bitmap("images/" + self.iconName + "Icon.bmp", wx.BITMAP_TYPE_BMP) self.SetBitmapLabel(bmp) self.isSelected = False #---------------------------------------------------------------------------- class ToolOptionIndicator(wx.Window): """ A visual indicator which shows the current tool options. """ def __init__(self, parent): """ Standard constructor. """ wx.Window.__init__(self, parent, -1, wx.DefaultPosition, wx.Size(52, 32)) self.penColour = wx.BLACK self.fillColour = wx.WHITE self.lineSize = 1 self.Bind(wx.EVT_PAINT, self.OnPaint) def setPenColour(self, penColour): """ Set the indicator's current pen colour. """ self.penColour = penColour self.Refresh() def setFillColour(self, fillColour): """ Set the indicator's current fill colour. """ self.fillColour = fillColour self.Refresh() def setLineSize(self, lineSize): """ Set the indicator's current pen colour. """ self.lineSize = lineSize self.Refresh() def OnPaint(self, event): """ Paint our tool option indicator. """ dc = wx.PaintDC(self) dc.BeginDrawing() if self.lineSize == 0: dc.SetPen(wx.Pen(self.penColour, self.lineSize, wx.TRANSPARENT)) else: dc.SetPen(wx.Pen(self.penColour, self.lineSize, wx.SOLID)) dc.SetBrush(wx.Brush(self.fillColour, wx.SOLID)) dc.DrawRectangle(5, 5, self.GetSize().width - 10, self.GetSize().height - 10) dc.EndDrawing() #---------------------------------------------------------------------------- class EditTextObjectDialog(wx.Dialog): """ Dialog box used to edit the properties of a text object. The user can edit the object's text, font, size, and text style. """ def __init__(self, parent, title): """ Standard constructor. """ wx.Dialog.__init__(self, parent, -1, title) self.textCtrl = wx.TextCtrl(self, 1001, "", style=wx.TE_PROCESS_ENTER, validator=TextObjectValidator()) extent = self.textCtrl.GetFullTextExtent("Hy") lineHeight = extent[1] + extent[3] self.textCtrl.SetSize(wx.Size(-1, lineHeight * 4)) self.Bind(wx.EVT_TEXT_ENTER, self._doEnter, id=1001) fonts = wx.FontEnumerator() fonts.EnumerateFacenames() self.fontList = fonts.GetFacenames() self.fontList.sort() fontLabel = wx.StaticText(self, -1, "Font:") self._setFontOptions(fontLabel, weight=wx.BOLD) self.fontCombo = wx.ComboBox(self, -1, "", wx.DefaultPosition, wx.DefaultSize, self.fontList, style = wx.CB_READONLY) self.fontCombo.SetSelection(0) # Default to first available font. self.sizeList = ["8", "9", "10", "12", "14", "16", "18", "20", "24", "32", "48", "72"] sizeLabel = wx.StaticText(self, -1, "Size:") self._setFontOptions(sizeLabel, weight=wx.BOLD) self.sizeCombo = wx.ComboBox(self, -1, "", wx.DefaultPosition, wx.DefaultSize, self.sizeList, style=wx.CB_READONLY) self.sizeCombo.SetSelection(3) # Default to 12 point text. gap = wx.LEFT | wx.TOP | wx.RIGHT comboSizer = wx.BoxSizer(wx.HORIZONTAL) comboSizer.Add(fontLabel, 0, gap | wx.ALIGN_CENTRE_VERTICAL, 5) comboSizer.Add(self.fontCombo, 0, gap, 5) comboSizer.Add((5, 5)) # Spacer. comboSizer.Add(sizeLabel, 0, gap | wx.ALIGN_CENTRE_VERTICAL, 5) comboSizer.Add(self.sizeCombo, 0, gap, 5) self.boldCheckbox = wx.CheckBox(self, -1, "Bold") self.italicCheckbox = wx.CheckBox(self, -1, "Italic") self.underlineCheckbox = wx.CheckBox(self, -1, "Underline") self._setFontOptions(self.boldCheckbox, weight=wx.BOLD) self._setFontOptions(self.italicCheckbox, style=wx.ITALIC) self._setFontOptions(self.underlineCheckbox, underline=True) styleSizer = wx.BoxSizer(wx.HORIZONTAL) styleSizer.Add(self.boldCheckbox, 0, gap, 5) styleSizer.Add(self.italicCheckbox, 0, gap, 5) styleSizer.Add(self.underlineCheckbox, 0, gap, 5) self.okButton = wx.Button(self, wx.ID_OK, "OK") self.cancelButton = wx.Button(self, wx.ID_CANCEL, "Cancel") btnSizer = wx.BoxSizer(wx.HORIZONTAL) btnSizer.Add(self.okButton, 0, gap, 5) btnSizer.Add(self.cancelButton, 0, gap, 5) sizer = wx.BoxSizer(wx.VERTICAL) sizer.Add(self.textCtrl, 1, gap | wx.EXPAND, 5) sizer.Add((10, 10)) # Spacer. sizer.Add(comboSizer, 0, gap | wx.ALIGN_CENTRE, 5) sizer.Add(styleSizer, 0, gap | wx.ALIGN_CENTRE, 5) sizer.Add((10, 10)) # Spacer. sizer.Add(btnSizer, 0, gap | wx.ALIGN_CENTRE, 5) self.SetAutoLayout(True) self.SetSizer(sizer) sizer.Fit(self) self.textCtrl.SetFocus() def objectToDialog(self, obj): """ Copy the properties of the given text object into the dialog box. """ self.textCtrl.SetValue(obj.getText()) self.textCtrl.SetSelection(0, len(obj.getText())) for i in range(len(self.fontList)): if self.fontList[i] == obj.getTextFont(): self.fontCombo.SetSelection(i) break for i in range(len(self.sizeList)): if self.sizeList[i] == str(obj.getTextSize()): self.sizeCombo.SetSelection(i) break self.boldCheckbox.SetValue(obj.getTextBoldface()) self.italicCheckbox.SetValue(obj.getTextItalic()) self.underlineCheckbox.SetValue(obj.getTextUnderline()) def dialogToObject(self, obj): """ Copy the properties from the dialog box into the given text object. """ obj.setText(self.textCtrl.GetValue()) obj.setTextFont(self.fontCombo.GetValue()) obj.setTextSize(int(self.sizeCombo.GetValue())) obj.setTextBoldface(self.boldCheckbox.GetValue()) obj.setTextItalic(self.italicCheckbox.GetValue()) obj.setTextUnderline(self.underlineCheckbox.GetValue()) obj.fitToText() # ====================== # == Private Routines == # ====================== def _setFontOptions(self, ctrl, family=None, pointSize=-1, style=wx.NORMAL, weight=wx.NORMAL, underline=False): """ Change the font settings for the given control. The meaning of the 'family', 'pointSize', 'style', 'weight' and 'underline' parameters are the same as for the wx.Font constructor. If the family and/or pointSize isn't specified, the current default value is used. """ if family == None: family = ctrl.GetFont().GetFamily() if pointSize == -1: pointSize = ctrl.GetFont().GetPointSize() ctrl.SetFont(wx.Font(pointSize, family, style, weight, underline)) ctrl.SetSize(ctrl.GetBestSize()) # Adjust size to reflect font change. def _doEnter(self, event): """ Respond to the user hitting the ENTER key. We simulate clicking on the "OK" button. """ if self.Validate(): self.Show(False) #---------------------------------------------------------------------------- class TextObjectValidator(wx.PyValidator): """ This validator is used to ensure that the user has entered something into the text object editor dialog's text field. """ def __init__(self): """ Standard constructor. """ wx.PyValidator.__init__(self) def Clone(self): """ Standard cloner. Note that every validator must implement the Clone() method. """ return TextObjectValidator() def Validate(self, win): """ Validate the contents of the given text control. """ textCtrl = self.GetWindow() text = textCtrl.GetValue() if len(text) == 0: wx.MessageBox("A text object must contain some text!", "Error") return False else: return True def TransferToWindow(self): """ Transfer data from validator to window. The default implementation returns False, indicating that an error occurred. We simply return True, as we don't do any data transfer. """ return True # Prevent wx.Dialog from complaining. def TransferFromWindow(self): """ Transfer data from window to validator. The default implementation returns False, indicating that an error occurred. We simply return True, as we don't do any data transfer. """ return True # Prevent wx.Dialog from complaining. #---------------------------------------------------------------------------- class ExceptionHandler: """ A simple error-handling class to write exceptions to a text file. Under MS Windows, the standard DOS console window doesn't scroll and closes as soon as the application exits, making it hard to find and view Python exceptions. This utility class allows you to handle Python exceptions in a more friendly manner. """ def __init__(self): """ Standard constructor. """ self._buff = "" if os.path.exists("errors.txt"): os.remove("errors.txt") # Delete previous error log, if any. def write(self, s): """ Write the given error message to a text file. Note that if the error message doesn't end in a carriage return, we have to buffer up the inputs until a carriage return is received. """ if (s[-1] != "\n") and (s[-1] != "\r"): self._buff = self._buff + s return try: s = self._buff + s self._buff = "" if s[:9] == "Traceback": # Tell the user than an exception occurred. wx.MessageBox("An internal error has occurred.\nPlease " + \ "refer to the 'errors.txt' file for details.", "Error", wx.OK | wx.CENTRE | wx.ICON_EXCLAMATION) f = open("errors.txt", "a") f.write(s) f.close() except: pass # Don't recursively crash on errors. #---------------------------------------------------------------------------- class SketchApp(wx.App): """ The main pySketch application object. """ def OnInit(self): """ Initialise the application. """ global _docList _docList = [] if len(sys.argv) == 1: # No file name was specified on the command line -> start with a # blank document. frame = DrawingFrame(None, -1, "Untitled") frame.Centre() frame.Show(True) _docList.append(frame) else: # Load the file(s) specified on the command line. for arg in sys.argv[1:]: fileName = os.path.join(os.getcwd(), arg) if os.path.isfile(fileName): frame = DrawingFrame(None, -1, os.path.basename(fileName), fileName=fileName) frame.Show(True) _docList.append(frame) return True #---------------------------------------------------------------------------- def main(): """ Start up the pySketch application. """ global _app # Redirect python exceptions to a log file. sys.stderr = ExceptionHandler() # Create and start the pySketch application. _app = SketchApp(0) _app.MainLoop() if __name__ == "__main__": main()