ce6b371d14
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41932 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
336 lines
11 KiB
Python
336 lines
11 KiB
Python
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import wx
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import images
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#----------------------------------------------------------------------
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class DragShape:
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def __init__(self, bmp):
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self.bmp = bmp
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self.pos = (0,0)
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self.shown = True
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self.text = None
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self.fullscreen = False
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def HitTest(self, pt):
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rect = self.GetRect()
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return rect.InsideXY(pt.x, pt.y)
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def GetRect(self):
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return wx.Rect(self.pos[0], self.pos[1],
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self.bmp.GetWidth(), self.bmp.GetHeight())
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def Draw(self, dc, op = wx.COPY):
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if self.bmp.Ok():
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memDC = wx.MemoryDC()
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memDC.SelectObject(self.bmp)
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dc.Blit(self.pos[0], self.pos[1],
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self.bmp.GetWidth(), self.bmp.GetHeight(),
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memDC, 0, 0, op, True)
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return True
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else:
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return False
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#----------------------------------------------------------------------
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class DragCanvas(wx.ScrolledWindow):
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def __init__(self, parent, ID):
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wx.ScrolledWindow.__init__(self, parent, ID)
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self.shapes = []
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self.dragImage = None
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self.dragShape = None
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self.hiliteShape = None
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self.SetCursor(wx.StockCursor(wx.CURSOR_ARROW))
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self.bg_bmp = images.getBackgroundBitmap()
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self.SetBackgroundStyle(wx.BG_STYLE_CUSTOM)
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# Make a shape from an image and mask. This one will demo
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# dragging outside the window
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bmp = images.getTestStarBitmap()
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#bmp = wx.Bitmap('bitmaps/toucan.png')
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shape = DragShape(bmp)
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shape.pos = (5, 5)
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shape.fullscreen = True
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self.shapes.append(shape)
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# Make a shape from some text
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text = "Some Text"
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bg_colour = wx.Colour(57, 115, 57) # matches the bg image
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font = wx.Font(15, wx.ROMAN, wx.NORMAL, wx.BOLD)
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textExtent = self.GetFullTextExtent(text, font)
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# create a bitmap the same size as our text
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bmp = wx.EmptyBitmap(textExtent[0], textExtent[1])
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# 'draw' the text onto the bitmap
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dc = wx.MemoryDC()
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dc.SelectObject(bmp)
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dc.SetBackground(wx.Brush(bg_colour, wx.SOLID))
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dc.Clear()
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dc.SetTextForeground(wx.RED)
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dc.SetFont(font)
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dc.DrawText(text, 0, 0)
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dc.SelectObject(wx.NullBitmap)
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mask = wx.Mask(bmp, bg_colour)
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bmp.SetMask(mask)
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shape = DragShape(bmp)
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shape.pos = (5, 100)
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shape.text = "Some dragging text"
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self.shapes.append(shape)
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bmp = images.getTheKidBitmap()
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shape = DragShape(bmp)
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shape.pos = (200, 5)
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self.shapes.append(shape)
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self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
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self.Bind(wx.EVT_PAINT, self.OnPaint)
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self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftDown)
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self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)
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self.Bind(wx.EVT_MOTION, self.OnMotion)
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self.Bind(wx.EVT_LEAVE_WINDOW, self.OnLeaveWindow)
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# We're not doing anything here, but you might have reason to.
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# for example, if you were dragging something, you might elect to
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# 'drop it' when the cursor left the window.
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def OnLeaveWindow(self, evt):
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pass
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# tile the background bitmap
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def TileBackground(self, dc):
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sz = self.GetClientSize()
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w = self.bg_bmp.GetWidth()
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h = self.bg_bmp.GetHeight()
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x = 0
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while x < sz.width:
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y = 0
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while y < sz.height:
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dc.DrawBitmap(self.bg_bmp, x, y)
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y = y + h
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x = x + w
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# Go through our list of shapes and draw them in whatever place they are.
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def DrawShapes(self, dc):
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for shape in self.shapes:
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if shape.shown:
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shape.Draw(dc)
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# This is actually a sophisticated 'hit test', but in this
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# case we're also determining which shape, if any, was 'hit'.
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def FindShape(self, pt):
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for shape in self.shapes:
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if shape.HitTest(pt):
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return shape
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return None
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# Remove a shape from the display
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def EraseShape(self, shape, dc):
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r = shape.GetRect()
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dc.SetClippingRect(r)
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self.TileBackground(dc)
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self.DrawShapes(dc)
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dc.DestroyClippingRegion()
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# Clears the background, then redraws it. If the DC is passed, then
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# we only do so in the area so designated. Otherwise, it's the whole thing.
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def OnEraseBackground(self, evt):
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dc = evt.GetDC()
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if not dc:
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dc = wx.ClientDC(self)
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rect = self.GetUpdateRegion().GetBox()
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dc.SetClippingRect(rect)
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self.TileBackground(dc)
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# Fired whenever a paint event occurs
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def OnPaint(self, evt):
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dc = wx.PaintDC(self)
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self.PrepareDC(dc)
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self.DrawShapes(dc)
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# Left mouse button is down.
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def OnLeftDown(self, evt):
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# Did the mouse go down on one of our shapes?
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shape = self.FindShape(evt.GetPosition())
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# If a shape was 'hit', then set that as the shape we're going to
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# drag around. Get our start position. Dragging has not yet started.
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# That will happen once the mouse moves, OR the mouse is released.
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if shape:
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self.dragShape = shape
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self.dragStartPos = evt.GetPosition()
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# Left mouse button up.
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def OnLeftUp(self, evt):
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if not self.dragImage or not self.dragShape:
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self.dragImage = None
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self.dragShape = None
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return
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# Hide the image, end dragging, and nuke out the drag image.
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self.dragImage.Hide()
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self.dragImage.EndDrag()
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self.dragImage = None
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if self.hiliteShape:
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self.RefreshRect(self.hiliteShape.GetRect())
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self.hiliteShape = None
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# reposition and draw the shape
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# Note by jmg 11/28/03
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# Here's the original:
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#
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# self.dragShape.pos = self.dragShape.pos + evt.GetPosition() - self.dragStartPos
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#
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# So if there are any problems associated with this, use that as
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# a starting place in your investigation. I've tried to simulate the
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# wx.Point __add__ method here -- it won't work for tuples as we
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# have now from the various methods
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#
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# There must be a better way to do this :-)
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#
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self.dragShape.pos = (
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self.dragShape.pos[0] + evt.GetPosition()[0] - self.dragStartPos[0],
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self.dragShape.pos[1] + evt.GetPosition()[1] - self.dragStartPos[1]
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)
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self.dragShape.shown = True
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self.RefreshRect(self.dragShape.GetRect())
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self.dragShape = None
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# The mouse is moving
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def OnMotion(self, evt):
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# Ignore mouse movement if we're not dragging.
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if not self.dragShape or not evt.Dragging() or not evt.LeftIsDown():
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return
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# if we have a shape, but haven't started dragging yet
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if self.dragShape and not self.dragImage:
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# only start the drag after having moved a couple pixels
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tolerance = 2
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pt = evt.GetPosition()
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dx = abs(pt.x - self.dragStartPos.x)
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dy = abs(pt.y - self.dragStartPos.y)
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if dx <= tolerance and dy <= tolerance:
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return
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# erase the shape since it will be drawn independently now
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dc = wx.ClientDC(self)
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self.dragShape.shown = False
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self.EraseShape(self.dragShape, dc)
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if self.dragShape.text:
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self.dragImage = wx.DragString(self.dragShape.text,
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wx.StockCursor(wx.CURSOR_HAND))
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else:
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self.dragImage = wx.DragImage(self.dragShape.bmp,
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wx.StockCursor(wx.CURSOR_HAND))
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hotspot = self.dragStartPos - self.dragShape.pos
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self.dragImage.BeginDrag(hotspot, self, self.dragShape.fullscreen)
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self.dragImage.Move(pt)
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self.dragImage.Show()
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# if we have shape and image then move it, posibly highlighting another shape.
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elif self.dragShape and self.dragImage:
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onShape = self.FindShape(evt.GetPosition())
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unhiliteOld = False
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hiliteNew = False
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# figure out what to hilite and what to unhilite
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if self.hiliteShape:
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if onShape is None or self.hiliteShape is not onShape:
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unhiliteOld = True
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if onShape and onShape is not self.hiliteShape and onShape.shown:
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hiliteNew = True
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# if needed, hide the drag image so we can update the window
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if unhiliteOld or hiliteNew:
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self.dragImage.Hide()
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if unhiliteOld:
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dc = wx.ClientDC(self)
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self.hiliteShape.Draw(dc)
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self.hiliteShape = None
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if hiliteNew:
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dc = wx.ClientDC(self)
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self.hiliteShape = onShape
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self.hiliteShape.Draw(dc, wx.INVERT)
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# now move it and show it again if needed
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self.dragImage.Move(evt.GetPosition())
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if unhiliteOld or hiliteNew:
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self.dragImage.Show()
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#----------------------------------------------------------------------
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def runTest(frame, nb, log):
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win = wx.Panel(nb, -1)
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canvas = DragCanvas(win, -1)
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def onSize(evt, panel=win, canvas=canvas):
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canvas.SetSize(panel.GetSize())
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win.Bind(wx.EVT_SIZE, onSize)
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return win
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#----------------------------------------------------------------------
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overview = """\
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DragImage is used when you wish to drag an object on the screen, and a simple
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cursor is not enough.
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On Windows, the WIN32 API is used to do achieve smooth dragging. On other
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platforms, <code>GenericDragImage</code> is used. Applications may also prefer to use
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<code>GenericDragImage</code> on Windows, too.
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<b>wxPython note</b>: wxPython uses <code>GenericDragImage</code> on all
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platforms, but uses the <code>DragImage</code> name.
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To use this class, when you wish to start dragging an image, create a
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<code>DragImage</code> object and store it somewhere you can access it as the
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drag progresses. Call BeginDrag to start, and EndDrag to stop the drag. To move
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the image, initially call Show and then Move. If you wish to update the screen
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contents during the drag (for example, highlight an item as in the example), first
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call Hide, update the screen, call Move, and then call Show.
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You can drag within one window, or you can use full-screen dragging either across
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the whole screen, or just restricted to one area of the screen to save resources.
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If you want the user to drag between two windows, then you will need to use
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full-screen dragging.
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"""
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if __name__ == '__main__':
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import sys,os
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import run
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run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
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