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from wxPython.wx import *
import images
BUFFERED = 1
#---------------------------------------------------------------------------
class MyCanvas(wxScrolledWindow):
def __init__(self, parent, id = -1, size = wxDefaultSize):
wxScrolledWindow.__init__(self, parent, id, wxPoint(0, 0), size, wxSUNKEN_BORDER)
self.lines = []
self.maxWidth = 1000
self.maxHeight = 1000
self.x = self.y = 0
self.curLine = []
self.drawing = False
self.SetBackgroundColour("WHITE")
self.SetCursor(wxStockCursor(wxCURSOR_PENCIL))
bmp = images.getTest2Bitmap()
mask = wxMaskColour(bmp, wxBLUE)
bmp.SetMask(mask)
self.bmp = bmp
self.SetScrollbars(20, 20, self.maxWidth/20, self.maxHeight/20)
if BUFFERED:
# Initialize the buffer bitmap. No real DC is needed at this point.
self.buffer = wxEmptyBitmap(self.maxWidth, self.maxHeight)
dc = wxBufferedDC(None, self.buffer)
dc.SetBackground(wxBrush(self.GetBackgroundColour()))
dc.Clear()
self.DoDrawing(dc)
EVT_LEFT_DOWN(self, self.OnLeftButtonEvent)
EVT_LEFT_UP(self, self.OnLeftButtonEvent)
EVT_MOTION(self, self.OnLeftButtonEvent)
EVT_PAINT(self, self.OnPaint)
##EVT_MOUSEWHEEL(self, self.OnWheel)
def getWidth(self):
return self.maxWidth
def getHeight(self):
return self.maxHeight
def OnPaint(self, event):
if BUFFERED:
# Create a buffered paint DC. It will create the real
# wxPaintDC and then blit the bitmap to it when dc is
# deleted. Since we don't need to draw anything else
# here that's all there is to it.
dc = wxBufferedPaintDC(self, self.buffer)
else:
dc = wxPaintDC(self)
self.PrepareDC(dc)
# since we're not buffering in this case, we have to
# paint the whole window, potentially very time consuming.
self.DoDrawing(dc)
def DoDrawing(self, dc, printing=False):
dc.BeginDrawing()
dc.SetPen(wxPen('RED'))
dc.DrawRectangle(5, 5, 50, 50)
dc.SetBrush(wxLIGHT_GREY_BRUSH)
dc.SetPen(wxPen('BLUE', 4))
dc.DrawRectangle(15, 15, 50, 50)
dc.SetFont(wxFont(14, wxSWISS, wxNORMAL, wxNORMAL))
dc.SetTextForeground(wxColour(0xFF, 0x20, 0xFF))
te = dc.GetTextExtent("Hello World")
dc.DrawText("Hello World", 60, 65)
dc.SetPen(wxPen('VIOLET', 4))
dc.DrawLine(5, 65+te[1], 60+te[0], 65+te[1])
lst = [(100,110), (150,110), (150,160), (100,160)]
dc.DrawLines(lst, -60)
dc.SetPen(wxGREY_PEN)
dc.DrawPolygon(lst, 75)
dc.SetPen(wxGREEN_PEN)
dc.DrawSpline(lst+[(100,100)])
dc.DrawBitmap(self.bmp, 200, 20, True)
dc.SetTextForeground(wxColour(0, 0xFF, 0x80))
dc.DrawText("a bitmap", 200, 85)
## dc.SetFont(wxFont(14, wxSWISS, wxNORMAL, wxNORMAL))
## dc.SetTextForeground("BLACK")
## dc.DrawText("TEST this STRING", 10, 200)
## print dc.GetFullTextExtent("TEST this STRING")
font = wxFont(20, wxSWISS, wxNORMAL, wxNORMAL)
dc.SetFont(font)
dc.SetTextForeground(wxBLACK)
for a in range(0, 360, 45):
dc.DrawRotatedText("Rotated text...", 300, 300, a)
dc.SetPen(wxTRANSPARENT_PEN)
dc.SetBrush(wxBLUE_BRUSH)
dc.DrawRectangle(50,500,50,50)
dc.DrawRectangle(100,500,50,50)
dc.SetPen(wxPen('RED'))
dc.DrawEllipticArc(200, 500, 50, 75, 0, 90)
if not printing:
# This has troubles when used on a print preview in wxGTK,
# probably something to do with the pen styles and the scaling
# it does...
y = 20
for style in [wxDOT, wxLONG_DASH, wxSHORT_DASH, wxDOT_DASH, wxUSER_DASH]:
pen = wxPen("DARK ORCHID", 1, style)
if style == wxUSER_DASH:
pen.SetCap(wxCAP_BUTT)
pen.SetDashes([1,2])
pen.SetColour("RED")
dc.SetPen(pen)
dc.DrawLine(300, y, 400, y)
y = y + 10
dc.SetBrush(wxTRANSPARENT_BRUSH)
dc.SetPen(wxPen(wxColour(0xFF, 0x20, 0xFF), 1, wxSOLID))
dc.DrawRectangle(450, 50, 100, 100)
old_pen = dc.GetPen()
new_pen = wxPen("BLACK", 5)
dc.SetPen(new_pen)
dc.DrawRectangle(470, 70, 60, 60)
dc.SetPen(old_pen)
dc.DrawRectangle(490, 90, 20, 20)
self.DrawSavedLines(dc)
dc.EndDrawing()
def DrawSavedLines(self, dc):
dc.SetPen(wxPen('MEDIUM FOREST GREEN', 4))
for line in self.lines:
for coords in line:
apply(dc.DrawLine, coords)
def SetXY(self, event):
self.x, self.y = self.ConvertEventCoords(event)
def ConvertEventCoords(self, event):
xView, yView = self.GetViewStart()
xDelta, yDelta = self.GetScrollPixelsPerUnit()
return (event.GetX() + (xView * xDelta),
event.GetY() + (yView * yDelta))
def OnLeftButtonEvent(self, event):
if event.LeftDown():
self.SetFocus()
self.SetXY(event)
self.curLine = []
self.CaptureMouse()
self.drawing = True
elif event.Dragging() and self.drawing:
if BUFFERED:
# If doing buffered drawing, create the buffered DC, giving it
# it a real DC to blit to when done.
cdc = wxClientDC(self)
self.PrepareDC(cdc)
dc = wxBufferedDC(cdc, self.buffer)
else:
dc = wxClientDC(self)
self.PrepareDC(dc)
dc.BeginDrawing()
dc.SetPen(wxPen('MEDIUM FOREST GREEN', 4))
coords = (self.x, self.y) + self.ConvertEventCoords(event)
self.curLine.append(coords)
apply(dc.DrawLine, coords)
self.SetXY(event)
dc.EndDrawing()
elif event.LeftUp() and self.drawing:
self.lines.append(self.curLine)
self.curLine = []
self.ReleaseMouse()
self.drawing = False
## This is an example of what to do for the EVT_MOUSEWHEEL event,
## but since wxScrolledWindow does this already it's not
## necessary to do it ourselves.
## wheelScroll = 0
## def OnWheel(self, evt):
## delta = evt.GetWheelDelta()
## rot = evt.GetWheelRotation()
## linesPer = evt.GetLinesPerAction()
## print delta, rot, linesPer
## ws = self.wheelScroll
## ws = ws + rot
## lines = ws / delta
## ws = ws - lines * delta
## self.wheelScroll = ws
## if lines != 0:
## lines = lines * linesPer
## vsx, vsy = self.GetViewStart()
## scrollTo = vsy - lines
## self.Scroll(-1, scrollTo)
#---------------------------------------------------------------------------
def runTest(frame, nb, log):
win = MyCanvas(nb)
return win
#---------------------------------------------------------------------------
overview = """\
"""
if __name__ == '__main__':
import sys,os
import run
run.main(['', os.path.basename(sys.argv[0])])
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