Use wxBufferedDC in the doodle sample
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15121 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Robin Dunn
parent
aae032a0a9
commit
9de06a7953
@ -32,8 +32,8 @@ class DoodleWindow(wxWindow):
|
||||
|
||||
|
||||
def __init__(self, parent, ID):
|
||||
wxWindow.__init__(self, parent, ID)
|
||||
self.SetBackgroundColour(wxWHITE)
|
||||
wxWindow.__init__(self, parent, ID, style=wxNO_FULL_REPAINT_ON_RESIZE)
|
||||
self.SetBackgroundColour("WHITE")
|
||||
self.listeners = []
|
||||
self.thickness = 1
|
||||
self.SetColour("Black")
|
||||
@ -41,18 +41,41 @@ class DoodleWindow(wxWindow):
|
||||
self.x = self.y = 0
|
||||
self.MakeMenu()
|
||||
|
||||
self.InitBuffer()
|
||||
|
||||
# hook some mouse events
|
||||
EVT_LEFT_DOWN(self, self.OnLeftDown)
|
||||
EVT_LEFT_UP(self, self.OnLeftUp)
|
||||
EVT_RIGHT_UP(self, self.OnRightUp)
|
||||
EVT_MOTION(self, self.OnMotion)
|
||||
|
||||
# the window resize event and idle events for managing the buffer
|
||||
EVT_SIZE(self, self.OnSize)
|
||||
EVT_IDLE(self, self.OnIdle)
|
||||
|
||||
# and the refresh event
|
||||
EVT_PAINT(self, self.OnPaint)
|
||||
|
||||
|
||||
def __del__(self):
|
||||
self.menu.Destroy()
|
||||
self.Cleanup()
|
||||
|
||||
|
||||
def Cleanup(self):
|
||||
if hasattr(self, "menu"):
|
||||
self.menu.Destroy()
|
||||
del self.menu
|
||||
|
||||
|
||||
def InitBuffer(self):
|
||||
"""Initialize the bitmap used for buffering the display."""
|
||||
size = self.GetClientSize()
|
||||
self.buffer = wxEmptyBitmap(size.width, size.height)
|
||||
dc = wxBufferedDC(None, self.buffer)
|
||||
dc.SetBackground(wxBrush(self.GetBackgroundColour()))
|
||||
dc.Clear()
|
||||
self.DrawLines(dc)
|
||||
self.reInitBuffer = false
|
||||
|
||||
|
||||
def SetColour(self, colour):
|
||||
@ -75,6 +98,7 @@ class DoodleWindow(wxWindow):
|
||||
|
||||
def SetLinesData(self, lines):
|
||||
self.lines = lines[:]
|
||||
self.InitBuffer()
|
||||
self.Refresh()
|
||||
|
||||
|
||||
@ -85,13 +109,13 @@ class DoodleWindow(wxWindow):
|
||||
keys.sort()
|
||||
for k in keys:
|
||||
text = self.menuColours[k]
|
||||
menu.Append(k, text, checkable=true)
|
||||
menu.Append(k, text, kind=wxITEM_CHECK)
|
||||
EVT_MENU_RANGE(self, 100, 200, self.OnMenuSetColour)
|
||||
EVT_UPDATE_UI_RANGE(self, 100, 200, self.OnCheckMenuColours)
|
||||
menu.Break()
|
||||
|
||||
for x in range(1, self.maxThickness+1):
|
||||
menu.Append(x, str(x), checkable=true)
|
||||
menu.Append(x, str(x), kind=wxITEM_CHECK)
|
||||
EVT_MENU_RANGE(self, 1, self.maxThickness, self.OnMenuSetThickness)
|
||||
EVT_UPDATE_UI_RANGE(self, 1, self.maxThickness, self.OnCheckMenuThickness)
|
||||
self.menu = menu
|
||||
@ -121,9 +145,10 @@ class DoodleWindow(wxWindow):
|
||||
|
||||
def OnLeftUp(self, event):
|
||||
"""called when the left mouse button is released"""
|
||||
self.lines.append( (self.colour, self.thickness, self.curLine) )
|
||||
self.curLine = []
|
||||
self.ReleaseMouse()
|
||||
if self.HasCapture():
|
||||
self.lines.append( (self.colour, self.thickness, self.curLine) )
|
||||
self.curLine = []
|
||||
self.ReleaseMouse()
|
||||
|
||||
|
||||
def OnRightUp(self, event):
|
||||
@ -140,7 +165,7 @@ class DoodleWindow(wxWindow):
|
||||
current one. Save the coordinants for redraws.
|
||||
"""
|
||||
if event.Dragging() and event.LeftIsDown():
|
||||
dc = wxClientDC(self)
|
||||
dc = wxBufferedDC(wxClientDC(self), self.buffer)
|
||||
dc.BeginDrawing()
|
||||
dc.SetPen(self.pen)
|
||||
pos = event.GetPositionTuple()
|
||||
@ -151,12 +176,41 @@ class DoodleWindow(wxWindow):
|
||||
dc.EndDrawing()
|
||||
|
||||
|
||||
def OnSize(self, event):
|
||||
"""
|
||||
Called when the window is resized. We set a flag so the idle
|
||||
handler will resize the buffer.
|
||||
"""
|
||||
self.reInitBuffer = true
|
||||
|
||||
|
||||
def OnIdle(self, event):
|
||||
"""
|
||||
If the size was changed then resize the bitmap used for double
|
||||
buffering to match the window size. We do it in Idle time so
|
||||
there is only one refresh after resizing is done, not lots while
|
||||
it is happening.
|
||||
"""
|
||||
if self.reInitBuffer:
|
||||
self.InitBuffer()
|
||||
self.Refresh(FALSE)
|
||||
|
||||
|
||||
def OnPaint(self, event):
|
||||
"""
|
||||
Called when the window is exposed. Redraws all the lines that have
|
||||
been drawn already.
|
||||
Called when the window is exposed.
|
||||
"""
|
||||
# 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)
|
||||
|
||||
|
||||
def DrawLines(self, dc):
|
||||
"""
|
||||
Redraws all the lines that have been drawn already.
|
||||
"""
|
||||
dc = wxPaintDC(self)
|
||||
dc.BeginDrawing()
|
||||
for colour, thickness, line in self.lines:
|
||||
pen = wxPen(wxNamedColour(colour), thickness, wxSOLID)
|
||||
@ -189,9 +243,9 @@ class DoodleWindow(wxWindow):
|
||||
|
||||
class DoodleFrame(wxFrame):
|
||||
def __init__(self, parent):
|
||||
wxFrame.__init__(self, parent, -1, "Doodle Frame", size=(800,600))
|
||||
self.doodle = DoodleWindow(self, -1)
|
||||
|
||||
wxFrame.__init__(self, parent, -1, "Doodle Frame", size=(800,600),
|
||||
style=wxDEFAULT_FRAME_STYLE | wxNO_FULL_REPAINT_ON_RESIZE)
|
||||
doodle = DoodleWindow(self, -1)
|
||||
|
||||
#----------------------------------------------------------------------
|
||||
|
||||
|
||||
@ -35,7 +35,8 @@ class DoodleFrame(wxFrame):
|
||||
"""
|
||||
title = "Do a doodle"
|
||||
def __init__(self, parent):
|
||||
wxFrame.__init__(self, parent, -1, self.title, size=(800,600))
|
||||
wxFrame.__init__(self, parent, -1, self.title, size=(800,600),
|
||||
style=wxDEFAULT_FRAME_STYLE | wxNO_FULL_REPAINT_ON_RESIZE)
|
||||
self.CreateStatusBar()
|
||||
self.MakeMenu()
|
||||
self.filename = None
|
||||
@ -55,6 +56,13 @@ class DoodleFrame(wxFrame):
|
||||
self.SetAutoLayout(true)
|
||||
self.SetSizer(box)
|
||||
|
||||
EVT_CLOSE(self, self.OnCloseWindow)
|
||||
|
||||
|
||||
def OnCloseWindow(self, event):
|
||||
self.doodle.Cleanup()
|
||||
self.Destroy()
|
||||
|
||||
|
||||
def SaveFile(self):
|
||||
if self.filename:
|
||||
|
||||
Loading…
Reference in New Issue
Block a user