30a04aa8cc
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@44551 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
257 lines
8.4 KiB
Python
257 lines
8.4 KiB
Python
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import wx
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import images
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BUFFERED = 1
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#---------------------------------------------------------------------------
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class MyCanvas(wx.ScrolledWindow):
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def __init__(self, parent, id = -1, size = wx.DefaultSize):
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wx.ScrolledWindow.__init__(self, parent, id, (0, 0), size=size, style=wx.SUNKEN_BORDER)
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self.lines = []
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self.maxWidth = 1000
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self.maxHeight = 1000
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self.x = self.y = 0
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self.curLine = []
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self.drawing = False
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self.SetBackgroundColour("WHITE")
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self.SetCursor(wx.StockCursor(wx.CURSOR_PENCIL))
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bmp = images.getTest2Bitmap()
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mask = wx.Mask(bmp, wx.BLUE)
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bmp.SetMask(mask)
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self.bmp = bmp
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self.SetVirtualSize((self.maxWidth, self.maxHeight))
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self.SetScrollRate(20,20)
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if BUFFERED:
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# Initialize the buffer bitmap. No real DC is needed at this point.
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self.buffer = wx.EmptyBitmap(self.maxWidth, self.maxHeight)
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dc = wx.BufferedDC(None, self.buffer)
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dc.SetBackground(wx.Brush(self.GetBackgroundColour()))
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dc.Clear()
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self.DoDrawing(dc)
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self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftButtonEvent)
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self.Bind(wx.EVT_LEFT_UP, self.OnLeftButtonEvent)
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self.Bind(wx.EVT_MOTION, self.OnLeftButtonEvent)
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self.Bind(wx.EVT_PAINT, self.OnPaint)
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def getWidth(self):
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return self.maxWidth
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def getHeight(self):
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return self.maxHeight
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def OnPaint(self, event):
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if BUFFERED:
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# Create a buffered paint DC. It will create the real
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# wx.PaintDC and then blit the bitmap to it when dc is
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# deleted. Since we don't need to draw anything else
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# here that's all there is to it.
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dc = wx.BufferedPaintDC(self, self.buffer, wx.BUFFER_VIRTUAL_AREA)
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else:
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dc = wx.PaintDC(self)
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self.PrepareDC(dc)
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# since we're not buffering in this case, we have to
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# paint the whole window, potentially very time consuming.
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self.DoDrawing(dc)
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def DoDrawing(self, dc, printing=False):
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dc.BeginDrawing()
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dc.SetPen(wx.Pen('RED'))
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dc.DrawRectangle(5, 5, 50, 50)
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dc.SetBrush(wx.LIGHT_GREY_BRUSH)
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dc.SetPen(wx.Pen('BLUE', 4))
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dc.DrawRectangle(15, 15, 50, 50)
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dc.SetFont(wx.Font(14, wx.SWISS, wx.NORMAL, wx.NORMAL))
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dc.SetTextForeground(wx.Colour(0xFF, 0x20, 0xFF))
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te = dc.GetTextExtent("Hello World")
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dc.DrawText("Hello World", 60, 65)
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dc.SetPen(wx.Pen('VIOLET', 4))
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dc.DrawLine(5, 65+te[1], 60+te[0], 65+te[1])
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lst = [(100,110), (150,110), (150,160), (100,160)]
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dc.DrawLines(lst, -60)
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dc.SetPen(wx.GREY_PEN)
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dc.DrawPolygon(lst, 75)
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dc.SetPen(wx.GREEN_PEN)
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dc.DrawSpline(lst+[(100,100)])
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dc.DrawBitmap(self.bmp, 200, 20, True)
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dc.SetTextForeground(wx.Colour(0, 0xFF, 0x80))
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dc.DrawText("a bitmap", 200, 85)
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## dc.SetFont(wx.Font(14, wx.SWISS, wx.NORMAL, wx.NORMAL))
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## dc.SetTextForeground("BLACK")
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## dc.DrawText("TEST this STRING", 10, 200)
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## print dc.GetFullTextExtent("TEST this STRING")
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font = wx.Font(20, wx.SWISS, wx.NORMAL, wx.NORMAL)
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dc.SetFont(font)
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dc.SetTextForeground(wx.BLACK)
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for a in range(0, 360, 45):
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dc.DrawRotatedText("Rotated text...", 300, 300, a)
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dc.SetPen(wx.TRANSPARENT_PEN)
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dc.SetBrush(wx.BLUE_BRUSH)
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dc.DrawRectangle(50,500, 50,50)
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dc.DrawRectangle(100,500, 50,50)
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dc.SetPen(wx.Pen('RED'))
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dc.DrawEllipticArc(200,500, 50,75, 0, 90)
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if not printing:
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# This has troubles when used on a print preview in wxGTK,
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# probably something to do with the pen styles and the scaling
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# it does...
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y = 20
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for style in [wx.DOT, wx.LONG_DASH, wx.SHORT_DASH, wx.DOT_DASH, wx.USER_DASH]:
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pen = wx.Pen("DARK ORCHID", 1, style)
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if style == wx.USER_DASH:
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pen.SetCap(wx.CAP_BUTT)
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pen.SetDashes([1,2])
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pen.SetColour("RED")
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dc.SetPen(pen)
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dc.DrawLine(300,y, 400,y)
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y = y + 10
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dc.SetBrush(wx.TRANSPARENT_BRUSH)
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dc.SetPen(wx.Pen(wx.Colour(0xFF, 0x20, 0xFF), 1, wx.SOLID))
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dc.DrawRectangle(450,50, 100,100)
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old_pen = dc.GetPen()
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new_pen = wx.Pen("BLACK", 5)
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dc.SetPen(new_pen)
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dc.DrawRectangle(470,70, 60,60)
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dc.SetPen(old_pen)
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dc.DrawRectangle(490,90, 20,20)
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dc.GradientFillLinear((20, 260, 50, 50),
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"red", "blue")
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dc.GradientFillConcentric((20, 325, 50, 50),
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"red", "blue", (25,25))
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self.DrawSavedLines(dc)
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dc.EndDrawing()
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def DrawSavedLines(self, dc):
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dc.SetPen(wx.Pen('MEDIUM FOREST GREEN', 4))
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for line in self.lines:
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for coords in line:
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apply(dc.DrawLine, coords)
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def SetXY(self, event):
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self.x, self.y = self.ConvertEventCoords(event)
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def ConvertEventCoords(self, event):
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newpos = self.CalcUnscrolledPosition(event.GetX(), event.GetY())
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return newpos
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def OnLeftButtonEvent(self, event):
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if event.LeftDown():
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self.SetFocus()
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self.SetXY(event)
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self.curLine = []
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self.CaptureMouse()
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self.drawing = True
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elif event.Dragging() and self.drawing:
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if BUFFERED:
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# If doing buffered drawing we'll just update the
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# buffer here and then refresh that portion of the
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# window, then that portion of the buffer will be
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# redrawn in the EVT_PAINT handler.
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dc = wx.BufferedDC(None, self.buffer)
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else:
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# otherwise we'll draw directly to a wx.ClientDC
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dc = wx.ClientDC(self)
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self.PrepareDC(dc)
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dc.SetPen(wx.Pen('MEDIUM FOREST GREEN', 4))
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coords = (self.x, self.y) + self.ConvertEventCoords(event)
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self.curLine.append(coords)
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dc.DrawLine(*coords)
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self.SetXY(event)
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if BUFFERED:
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# figure out what part of the window to refresh
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x1,y1, x2,y2 = dc.GetBoundingBox()
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x1,y1 = self.CalcScrolledPosition(x1, y1)
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x2,y2 = self.CalcScrolledPosition(x2, y2)
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# make a rectangle
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rect = wx.Rect()
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rect.SetTopLeft((x1,y1))
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rect.SetBottomRight((x2,y2))
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rect.Inflate(2,2)
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# refresh it
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self.RefreshRect(rect)
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elif event.LeftUp() and self.drawing:
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self.lines.append(self.curLine)
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self.curLine = []
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self.ReleaseMouse()
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self.drawing = False
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## This is an example of what to do for the EVT_MOUSEWHEEL event,
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## but since wx.ScrolledWindow does this already it's not
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## necessary to do it ourselves. You would need to add an event table
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## entry to __init__() to direct wheelmouse events to this handler.
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## wheelScroll = 0
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## def OnWheel(self, evt):
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## delta = evt.GetWheelDelta()
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## rot = evt.GetWheelRotation()
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## linesPer = evt.GetLinesPerAction()
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## print delta, rot, linesPer
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## ws = self.wheelScroll
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## ws = ws + rot
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## lines = ws / delta
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## ws = ws - lines * delta
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## self.wheelScroll = ws
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## if lines != 0:
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## lines = lines * linesPer
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## vsx, vsy = self.GetViewStart()
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## scrollTo = vsy - lines
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## self.Scroll(-1, scrollTo)
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#---------------------------------------------------------------------------
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def runTest(frame, nb, log):
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win = MyCanvas(nb)
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return win
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#---------------------------------------------------------------------------
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overview = """
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<html>
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<body>
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The wx.ScrolledWindow class manages scrolling for its client area, transforming the
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coordinates according to the scrollbar positions, and setting the scroll positions,
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thumb sizes and ranges according to the area in view.
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</body>
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</html>
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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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