-# 11/15/2003 - Jeff Grimmett (grimmtooth@softhome.net)
-#
-# o Updated for wx namespace
-#
-
-import wx
-import images
-
-#----------------------------------------------------------------------
-
-class DragShape:
- def __init__(self, bmp):
- self.bmp = bmp
- self.pos = (0,0)
- self.shown = True
- self.text = None
- self.fullscreen = False
-
- def HitTest(self, pt):
- rect = self.GetRect()
- return rect.InsideXY(pt.x, pt.y)
-
- def GetRect(self):
- return wx.Rect(self.pos[0], self.pos[1],
- self.bmp.GetWidth(), self.bmp.GetHeight())
-
- def Draw(self, dc, op = wx.COPY):
- if self.bmp.Ok():
- memDC = wx.MemoryDC()
- memDC.SelectObject(self.bmp)
-
- dc.Blit((self.pos[0], self.pos[1]),
- (self.bmp.GetWidth(), self.bmp.GetHeight()),
- memDC, (0, 0), op, True)
-
- return True
- else:
- return False
-
-
-
-#----------------------------------------------------------------------
-
-class DragCanvas(wx.ScrolledWindow):
- def __init__(self, parent, ID):
- wx.ScrolledWindow.__init__(self, parent, ID)
- self.shapes = []
- self.dragImage = None
- self.dragShape = None
- self.hiliteShape = None
-
- self.SetCursor(wx.StockCursor(wx.CURSOR_ARROW))
- self.bg_bmp = images.getBackgroundBitmap()
-
- # Make a shape from an image and mask. This one will demo
- # dragging outside the window
- bmp = images.getTestStarBitmap()
- shape = DragShape(bmp)
- shape.pos = (5, 5)
- shape.fullscreen = True
- self.shapes.append(shape)
-
- # Make a shape from some text
- text = "Some Text"
- bg_colour = wx.Colour(57, 115, 57) # matches the bg image
- font = wx.Font(15, wx.ROMAN, wx.NORMAL, wx.BOLD)
- textExtent = self.GetFullTextExtent(text, font)
-
- # create a bitmap the same size as our text
- bmp = wx.EmptyBitmap(textExtent[0], textExtent[1])
-
- # 'draw' the text onto the bitmap
- dc = wx.MemoryDC()
- dc.SelectObject(bmp)
- dc.SetBackground(wx.Brush(bg_colour, wx.SOLID))
- dc.Clear()
- dc.SetTextForeground(wx.RED)
- dc.SetFont(font)
- dc.DrawText(text, (0, 0))
- dc.SelectObject(wx.NullBitmap)
- mask = wx.MaskColour(bmp, bg_colour)
- bmp.SetMask(mask)
- shape = DragShape(bmp)
- shape.pos = (5, 100)
- shape.text = "Some dragging text"
- self.shapes.append(shape)
-
-
- # Make some shapes from some playing card images.
- x = 200
-
- for card in ['_01c_', '_12h_', '_13d_', '_10s_']:
- bmpFunc = getattr(images, "get%sBitmap" % card)
- bmp = bmpFunc()
- shape = DragShape(bmp)
- shape.pos = (x, 5)
- self.shapes.append(shape)
- x = x + 80
-
-
- self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
- self.Bind(wx.EVT_PAINT, self.OnPaint)
- self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftDown)
- self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)
- self.Bind(wx.EVT_MOTION, self.OnMotion)
- self.Bind(wx.EVT_LEAVE_WINDOW, self.OnLeaveWindow)
-
-
- # We're not doing anything here, but you might have reason to.
- # for example, if you were dragging something, you might elect to
- # 'drop it' when the cursor left the window.
- def OnLeaveWindow(self, evt):
- pass
-
-
- # tile the background bitmap
- def TileBackground(self, dc):
- sz = self.GetClientSize()
- w = self.bg_bmp.GetWidth()
- h = self.bg_bmp.GetHeight()
-
- x = 0
-
- while x < sz.width:
- y = 0
-
- while y < sz.height:
- dc.DrawBitmap(self.bg_bmp, (x, y))
- y = y + h
-
- x = x + w
-
-
- # Go through our list of shapes and draw them in whatever place they are.
- def DrawShapes(self, dc):
- for shape in self.shapes:
- if shape.shown:
- shape.Draw(dc)
-
- # This is actually a sophisticated 'hit test', but in this
- # case we're also determining which shape, if any, was 'hit'.
- def FindShape(self, pt):
- for shape in self.shapes:
- if shape.HitTest(pt):
- return shape
- return None
-
- # Remove a shape from the display
- def EraseShape(self, shape, dc):
- r = shape.GetRect()
- dc.SetClippingRect(r)
- self.TileBackground(dc)
- self.DrawShapes(dc)
- dc.DestroyClippingRegion()
-
- # Clears the background, then redraws it. If the DC is passed, then
- # we only do so in the area so designated. Otherwise, it's the whole thing.
- def OnEraseBackground(self, evt):
- dc = evt.GetDC()
-
- if not dc:
- dc = wxClientDC(self)
- rect = self.GetUpdateRegion().GetBox()
- dc.SetClippingRect(rect)
- self.TileBackground(dc)
-
- # Fired whenever a paint event occurs
- def OnPaint(self, evt):
- dc = wx.PaintDC(self)
- self.PrepareDC(dc)
- self.DrawShapes(dc)
-
- # Left mouse button is down.
- def OnLeftDown(self, evt):
- # Did the mouse go down on one of our shapes?
- shape = self.FindShape(evt.GetPosition())
-
- # If a shape was 'hit', then set that as the shape we're going to
- # drag around. Get our start position. Dragging has not yet started.
- # That will happen once the mouse moves, OR the mouse is released.
- if shape:
- self.dragShape = shape
- self.dragStartPos = evt.GetPosition()
-
- # Left mouse button up.
- def OnLeftUp(self, evt):
- if not self.dragImage or not self.dragShape:
- self.dragImage = None
- self.dragShape = None
- return
-
- # Hide the image, end dragging, and nuke out the drag image.
- self.dragImage.Hide()
- self.dragImage.EndDrag()
- self.dragImage = None
-
- dc = wx.ClientDC(self)
-
- if self.hiliteShape:
- self.hiliteShape.Draw(dc)
- self.hiliteShape = None
-
- # reposition and draw the shape
-
- # Note by jmg 11/28/03
- # Here's the original:
- #
- # self.dragShape.pos = self.dragShape.pos + evt.GetPosition() - self.dragStartPos
- #
- # So if there are any problems associated with this, use that as
- # a starting place in your investigation. I've tried to simulate the
- # wx.Point __add__ method here -- it won't work for tuples as we
- # have now from the various methods
- #
- # There must be a better way to do this :-)
- #
-
- self.dragShape.pos = (
- self.dragShape.pos[0] + evt.GetPosition()[0] - self.dragStartPos[0],
- self.dragShape.pos[1] + evt.GetPosition()[1] - self.dragStartPos[1]
- )
-
- self.dragShape.shown = True
- self.dragShape.Draw(dc)
- self.dragShape = None
-
- # The mouse is moving
- def OnMotion(self, evt):
- # Ignore mouse movement if we're not dragging.
- if not self.dragShape or not evt.Dragging() or not evt.LeftIsDown():
- return
-
- # if we have a shape, but haven't started dragging yet
- if self.dragShape and not self.dragImage:
-
- # only start the drag after having moved a couple pixels
- tolerance = 2
- pt = evt.GetPosition()
- dx = abs(pt.x - self.dragStartPos.x)
- dy = abs(pt.y - self.dragStartPos.y)
- if dx <= tolerance and dy <= tolerance:
- return
-
- # erase the shape since it will be drawn independently now
- dc = wx.ClientDC(self)
- self.dragShape.shown = False
- self.EraseShape(self.dragShape, dc)
-
-
- if self.dragShape.text:
- self.dragImage = wx.DragString(self.dragShape.text,
- wx.StockCursor(wx.CURSOR_HAND))
- else:
- self.dragImage = wx.DragImage(self.dragShape.bmp,
- wx.StockCursor(wx.CURSOR_HAND))
-
- hotspot = self.dragStartPos - self.dragShape.pos
- self.dragImage.BeginDrag(hotspot, self, self.dragShape.fullscreen)
-
- self.dragImage.Move(pt)
- self.dragImage.Show()
-
-
- # if we have shape and image then move it, posibly highlighting another shape.
- elif self.dragShape and self.dragImage:
- onShape = self.FindShape(evt.GetPosition())
- unhiliteOld = False
- hiliteNew = False
-
- # figure out what to hilite and what to unhilite
- if self.hiliteShape:
- if onShape is None or self.hiliteShape is not onShape:
- unhiliteOld = True
-
- if onShape and onShape is not self.hiliteShape and onShape.shown:
- hiliteNew = True
-
- # if needed, hide the drag image so we can update the window
- if unhiliteOld or hiliteNew:
- self.dragImage.Hide()
-
- if unhiliteOld:
- dc = wx.ClientDC(self)
- self.hiliteShape.Draw(dc)
- self.hiliteShape = None
-
- if hiliteNew:
- dc = wx.ClientDC(self)
- self.hiliteShape = onShape
- self.hiliteShape.Draw(dc, wx.INVERT)
-
- # now move it and show it again if needed
- self.dragImage.Move(evt.GetPosition())
- if unhiliteOld or hiliteNew:
- self.dragImage.Show()
-
-
-#----------------------------------------------------------------------
-
-def runTest(frame, nb, log):
-
- win = wx.Panel(nb, -1)
- canvas = DragCanvas(win, -1)
-
- def onSize(evt, panel=win, canvas=canvas):
- canvas.SetSize(panel.GetSize())
-
- win.Bind(wx.EVT_SIZE, onSize)
- return win
-
-#----------------------------------------------------------------------
-
-
-
-overview = """\
-DragImage is used when you wish to drag an object on the screen, and a simple
-cursor is not enough.
-
-On Windows, the WIN32 API is used to do achieve smooth dragging. On other
-platforms, <code>GenericDragImage</code> is used. Applications may also prefer to use
-<code>GenericDragImage</code> on Windows, too.
-
-<b>wxPython note</b>: wxPython uses <code>GenericDragImage</code> on all
-platforms, but uses the <code>DragImage</code> name.
-
-To use this class, when you wish to start dragging an image, create a
-<code>DragImage</code> object and store it somewhere you can access it as the
-drag progresses. Call BeginDrag to start, and EndDrag to stop the drag. To move
-the image, initially call Show and then Move. If you wish to update the screen
-contents during the drag (for example, highlight an item as in the example), first
-call Hide, update the screen, call Move, and then call Show.
-
-You can drag within one window, or you can use full-screen dragging either across
-the whole screen, or just restricted to one area of the screen to save resources.
-If you want the user to drag between two windows, then you will need to use
-full-screen dragging.
-
-"""
-
-
-if __name__ == '__main__':
- import sys,os
- import run
- run.main(['', os.path.basename(sys.argv[0])])
-
projects / wxWidgets.git / blobdiff