openmedialibrary_platform_w.../Lib/site-packages/win32/Demos/win32clipboard_bitmapdemo.py
2016-04-14 21:54:42 +02:00

85 lines
3.4 KiB
Python

import win32gui
import win32api
import win32clipboard
import win32con
import time
class ViewerWindow:
def __init__(self):
self.hwndNextViewer = None
def OnPaint(self, hwnd, msg, wp, lp):
dc, ps=win32gui.BeginPaint(hwnd)
wndrect = win32gui.GetClientRect(hwnd)
wndwidth = wndrect[2]-wndrect[0]
wndheight = wndrect[3]-wndrect[1]
win32clipboard.OpenClipboard()
try:
try:
hbitmap = win32clipboard.GetClipboardData(win32clipboard.CF_BITMAP)
except TypeError:
font=win32gui.LOGFONT()
font.lfHeight=15 #int(wndheight/20)
font.lfWidth=15 #font.lfHeight
# font.lfWeight=150
hf=win32gui.CreateFontIndirect(font)
win32gui.SelectObject(dc,hf)
win32gui.SetBkMode(dc, win32con.TRANSPARENT)
win32gui.SetTextColor(dc,win32api.RGB(0,0,0))
win32gui.DrawText(dc,'No bitmaps are in the clipboard\n(try pressing the PrtScn button)', -1,
(0,0, wndwidth, wndheight),
win32con.DT_CENTER)
else:
bminfo = win32gui.GetObject(hbitmap)
dcDC = win32gui.CreateCompatibleDC(None)
win32gui.SelectObject(dcDC, hbitmap)
win32gui.StretchBlt(dc, 0, 0, wndwidth, wndheight, dcDC, 0, 0, bminfo.bmWidth, bminfo.bmHeight, win32con.SRCCOPY)
win32gui.DeleteDC(dcDC)
win32gui.EndPaint(hwnd, ps)
finally:
win32clipboard.CloseClipboard()
return 0
def OnDrawClipboard(self, hwnd, msg, wp, lp):
win32gui.InvalidateRect(hwnd,None,True)
def OnChangeCBChain(self, hwnd, msg, wp, lp):
# If the next window is closing, repair the chain.
if wp == self.hwndNextViewer:
self.hwndNextViewer = lp
# Otherwise, pass the message to the next link.
elif self.hwndNextViewer:
win32gui.SendMessage(self.hwndNextViewer, msg, wp, lp)
def OnCreate(self, hwnd, msg, wp, lp):
self.hwndNextViewer = win32gui.SetClipboardViewer(hwnd);
def OnClose(self, hwnd, msg, wp, lp):
win32clipboard.ChangeClipboardChain(hwnd, self.hwndNextViewer)
win32gui.DestroyWindow(hwnd)
win32gui.PostQuitMessage(0)
def go(self):
wndproc={win32con.WM_PAINT: self.OnPaint,
win32con.WM_CLOSE: self.OnClose,
win32con.WM_CREATE: self.OnCreate,
win32con.WM_DRAWCLIPBOARD: self.OnDrawClipboard,
win32con.WM_CHANGECBCHAIN: self.OnChangeCBChain,
}
wc = win32gui.WNDCLASS()
wc.lpszClassName = 'test_win32clipboard_bmp'
wc.style = win32con.CS_GLOBALCLASS|win32con.CS_VREDRAW | win32con.CS_HREDRAW
wc.hbrBackground = win32con.COLOR_WINDOW+1
wc.lpfnWndProc=wndproc
class_atom=win32gui.RegisterClass(wc)
hwnd = win32gui.CreateWindowEx(0, class_atom,'ClipboardViewer',
win32con.WS_CAPTION|win32con.WS_VISIBLE|win32con.WS_THICKFRAME|win32con.WS_SYSMENU,
100,100,900,900, 0, 0, 0, None)
win32clipboard.SetClipboardViewer(hwnd)
win32gui.PumpMessages()
win32gui.UnregisterClass(class_atom,None)
if __name__=='__main__':
w = ViewerWindow()
w.go()