X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/8a693e6e0460b6b3c32e4b6f114a3ab7b7cd24ea..f6bcfd974ef26faf6f91a62cac09827e09463fd1:/wxPython/demo/wxDragImage.py

diff --git a/wxPython/demo/wxDragImage.py b/wxPython/demo/wxDragImage.py
new file mode 100644
index 0000000000..19985b7dd3
--- /dev/null
+++ b/wxPython/demo/wxDragImage.py
@@ -0,0 +1,249 @@
+
+from wxPython.wx import *
+
+#----------------------------------------------------------------------
+
+class DragShape:
+    def __init__(self, bmp):
+        self.bmp = bmp
+        self.pos = wxPoint(0,0)
+        self.shown = true
+        self.text = None
+        self.fullscreen = false
+
+
+    def HitTest(self, pt):
+        rect = self.GetRect()
+        return rect.Inside(pt.x, pt.y)
+
+
+    def GetRect(self):
+        return wxRect(self.pos.x, self.pos.y,
+                      self.bmp.GetWidth(), self.bmp.GetHeight())
+
+
+    def Draw(self, dc, op = wxCOPY):
+        if self.bmp.Ok():
+            memDC = wxMemoryDC()
+            memDC.SelectObject(self.bmp)
+
+            dc.Blit(self.pos.x, self.pos.y,
+                    self.bmp.GetWidth(), self.bmp.GetHeight(),
+                    memDC, 0, 0, op, true)
+
+            return true
+        else:
+            return false
+
+
+
+#----------------------------------------------------------------------
+
+class DragCanvas(wxScrolledWindow):
+    def __init__(self, parent, ID):
+        wxScrolledWindow.__init__(self, parent, ID)
+        self.shapes = []
+        self.dragImage = None
+        self.dragShape = None
+
+        self.SetCursor(wxStockCursor(wxCURSOR_ARROW))
+        self.bg_bmp = wxBitmap('bitmaps/backgrnd.png', wxBITMAP_TYPE_PNG)
+
+
+        # Make a shape from an image and mask.  This one will demo
+        # dragging outside the window
+        bmp = wxBitmap('bitmaps/test_image.png', wxBITMAP_TYPE_PNG)
+        mask = wxMaskColour(bmp, wxWHITE)
+        bmp.SetMask(mask)
+        shape = DragShape(bmp)
+        shape.pos = wxPoint(5, 5)
+        shape.fullscreen = true
+        self.shapes.append(shape)
+
+
+        # Make a shape from some text
+        text = "Some Text"
+        font = wxFont(15, wxROMAN, wxNORMAL, wxBOLD)
+        textExtent = self.GetFullTextExtent(text, font)
+        bmp = wxEmptyBitmap(textExtent[0], textExtent[1])
+        dc = wxMemoryDC()
+        dc.SelectObject(bmp)
+        dc.Clear()
+        dc.SetTextForeground(wxRED)
+        dc.SetFont(font)
+        dc.DrawText(text, 0, 0)
+        dc.SelectObject(wxNullBitmap)
+        del dc
+        mask = wxMaskColour(bmp, wxWHITE)
+        bmp.SetMask(mask)
+        shape = DragShape(bmp)
+        shape.pos = wxPoint(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.gif', '10s.gif', '12h.gif', '13d.gif']:
+            bmp = wxBitmap('bitmaps/'+card, wxBITMAP_TYPE_GIF)
+            shape = DragShape(bmp)
+            shape.pos = wxPoint(x, 5)
+            self.shapes.append(shape)
+            x = x + 80
+
+
+        EVT_ERASE_BACKGROUND(self, self.OnEraseBackground)
+        EVT_PAINT(self, self.OnPaint)
+        EVT_LEFT_DOWN(self, self.OnLeftDown)
+        EVT_LEFT_UP(self, self.OnLeftUp)
+        EVT_MOTION(self, self.OnMotion)
+
+
+
+    def TileBackground(self, dc):
+        # tile the background bitmap
+        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
+
+
+    def DrawShapes(self, dc):
+        for shape in self.shapes:
+            if shape.shown:
+                shape.Draw(dc)
+
+
+    def FindShape(self, pt):
+        for shape in self.shapes:
+            if shape.HitTest(pt):
+                return shape
+        return None
+
+
+    def EraseShape(self, shape, dc):
+        r = shape.GetRect()
+        dc.SetClippingRegion(r.x, r.y, r.width, r.height)
+        self.TileBackground(dc)
+        self.DrawShapes(dc)
+        dc.DestroyClippingRegion()
+
+
+
+
+    def OnEraseBackground(self, evt):
+        dc = evt.GetDC()
+        if not dc:
+            dc = wxClientDC(self)
+        self.TileBackground(dc)
+
+
+    def OnPaint(self, evt):
+        dc = wxPaintDC(self)
+        self.PrepareDC(dc)
+        self.DrawShapes(dc)
+
+
+    def OnLeftDown(self, evt):
+        shape = self.FindShape(evt.GetPosition())
+        if shape:
+            # get ready to start dragging, but wait for the user to
+            # move it a bit first
+            self.dragShape = shape
+            self.dragStartPos = evt.GetPosition()
+
+
+    def OnLeftUp(self, evt):
+        if not self.dragImage or not self.dragShape:
+            self.dragImage = None
+            self.dragShape = None
+            return
+
+        # end the dragging
+        self.dragImage.Hide()
+        self.dragImage.EndDrag()
+        self.dragImage = None
+
+        # reposition and draw the shape
+        pt = evt.GetPosition()
+        newPos = wxPoint(self.dragShape.pos.x + (pt.x - self.dragStartPos.x),
+                         self.dragShape.pos.y + (pt.y - self.dragStartPos.y))
+
+        dc = wxClientDC(self)
+        self.dragShape.pos = newPos
+        self.dragShape.shown = true
+        self.dragShape.Draw(dc)
+        self.dragShape = None
+
+
+    def OnMotion(self, evt):
+        if not self.dragShape or not evt.Dragging() or not evt.LeftIsDown():
+            return
+
+        # if we have a shape, but havn't started dragging yet
+        if self.dragShape and not self.dragImage:
+
+            # only start the drag after having moved a couple pixels
+            tolerance = 4
+            pt = evt.GetPosition()
+            dx = abs(pt.x - self.dragStartPos.x)
+            dy = abs(pt.y - self.dragStartPos.y)
+            if dx <= tolerance and dy <= tolerance:
+                return
+
+            if self.dragShape.text:
+                self.dragImage = wxDragString(self.dragShape.text,
+                                              wxStockCursor(wxCURSOR_HAND))
+            else:
+                self.dragImage = wxDragImage(self.dragShape.bmp,
+                                             wxStockCursor(wxCURSOR_HAND))
+
+            newPos = wxPoint(self.dragShape.pos.x + (pt.x - self.dragStartPos.x),
+                             self.dragShape.pos.y + (pt.y - self.dragStartPos.y))
+
+            if self.dragShape.fullscreen:
+                newPos = self.ClientToScreen(newPos)
+                self.dragImage.BeginDrag((0,0), self, true)
+            else:
+                self.dragImage.BeginDrag((0,0), self)
+
+
+            # erase the shape since it will be drawn independently now
+            dc = wxClientDC(self)
+            self.dragShape.shown = false
+            self.EraseShape(self.dragShape, dc)
+
+            self.dragImage.Move(newPos)
+            self.dragImage.Show()
+
+
+        # if we have shape and image then move it.
+        elif self.dragShape and self.dragImage:
+            pt = evt.GetPosition()
+            newPos = wxPoint(self.dragShape.pos.x + (pt.x - self.dragStartPos.x),
+                             self.dragShape.pos.y + (pt.y - self.dragStartPos.y))
+            if self.dragShape.fullscreen:
+                newPos = self.ClientToScreen(newPos)
+
+            self.dragImage.Move(newPos)
+
+
+#----------------------------------------------------------------------
+
+def runTest(frame, nb, log):
+    win = DragCanvas(nb, -1)
+    return win
+
+#----------------------------------------------------------------------
+
+
+
+overview = """\
+"""