pywin32
The pywin32 package provides access to various Windows APIs within Python. These APIs can be used to create UI objects (windows, dialogs, etc..), interface to native or 3rd party libraries using COM, access low-level OS functionality, and much more.
Installation:
- Go to the pywin32 download page and download the latest version of the pywin32 installer. Use the table below to determine which version of Python your Vizard installation uses:
- Vizard 2.x uses Python 2.3
- Vizard 3.x uses Python 2.4
- Vizard 4.x uses Python 2.7
- Vizard 5.x uses Python 2.7
- Run the installer. It should automatically detect Vizard's Python installation. If you have multiple Python installations on your computer, make sure you select the Vizard Python installation.
Once pywin32 is installed, you can browse the installation folder for documentation and sample scripts. The pywin32 package provides a wealth of functionality that cannot be completely covered by this article.
Here is one example that uses the pywin32 package to create a window and draw some simple shapes:
import win32gui, win32con, win32api
import time
def OnPaint(hwnd, msg, wp, lp):
"""Windows needs repainting"""
dc, ps=win32gui.BeginPaint(hwnd)
#Draw red circle
br=win32gui.CreateSolidBrush(win32api.RGB(255,0,0))
win32gui.SelectObject(dc, br)
win32gui.Ellipse(dc, 20,20,120,120)
#Draw green rectangle
br=win32gui.CreateSolidBrush(win32api.RGB(0,255,0))
win32gui.SelectObject(dc, br)
win32gui.Rectangle(dc, 150,20,300,120)
#Draw blue triangle
br=win32gui.CreateSolidBrush(win32api.RGB(0,0,255))
win32gui.SelectObject(dc, br)
win32gui.Polygon(dc, [(400,20), (350,120), (450,120)] )
win32gui.EndPaint(hwnd, ps)
return 0
def OnClose(hwnd, msg, wparam, lparam):
"""Destroy window when it is closed by user"""
win32gui.DestroyWindow(hwnd)
def OnDestroy(hwnd, msg, wparam, lparam):
"""Quit application when window is destroyed"""
win32gui.PostQuitMessage(0)
#Define message map for window
wndproc = { win32con.WM_PAINT:OnPaint,
win32con.WM_CLOSE:OnClose,
win32con.WM_DESTROY:OnDestroy
}
def CreateWindow(title,message_map,(l,t,r,b)):
"""Create a window with defined title, message map, and rectangle"""
wc = win32gui.WNDCLASS()
wc.lpszClassName = 'test_win32gui_1'
wc.style = win32con.CS_GLOBALCLASS|win32con.CS_VREDRAW | win32con.CS_HREDRAW
wc.hbrBackground = win32con.COLOR_WINDOW+1
wc.hCursor = win32gui.LoadCursor( 0, win32con.IDC_ARROW )
wc.lpfnWndProc=message_map
class_atom=win32gui.RegisterClass(wc)
hwnd = win32gui.CreateWindow(wc.lpszClassName,
title,
win32con.WS_CAPTION|win32con.WS_VISIBLE|win32con.WS_SYSMENU,
l,t,r,b, 0, 0, 0, None)
while win32gui.PumpWaitingMessages() == 0:
time.sleep(0.01)
win32gui.UnregisterClass(wc.lpszClassName, None)
#Display sample window
CreateWindow('Pywin32 sample',wndproc,(100,100,500,200))
import time
def OnPaint(hwnd, msg, wp, lp):
"""Windows needs repainting"""
dc, ps=win32gui.BeginPaint(hwnd)
#Draw red circle
br=win32gui.CreateSolidBrush(win32api.RGB(255,0,0))
win32gui.SelectObject(dc, br)
win32gui.Ellipse(dc, 20,20,120,120)
#Draw green rectangle
br=win32gui.CreateSolidBrush(win32api.RGB(0,255,0))
win32gui.SelectObject(dc, br)
win32gui.Rectangle(dc, 150,20,300,120)
#Draw blue triangle
br=win32gui.CreateSolidBrush(win32api.RGB(0,0,255))
win32gui.SelectObject(dc, br)
win32gui.Polygon(dc, [(400,20), (350,120), (450,120)] )
win32gui.EndPaint(hwnd, ps)
return 0
def OnClose(hwnd, msg, wparam, lparam):
"""Destroy window when it is closed by user"""
win32gui.DestroyWindow(hwnd)
def OnDestroy(hwnd, msg, wparam, lparam):
"""Quit application when window is destroyed"""
win32gui.PostQuitMessage(0)
#Define message map for window
wndproc = { win32con.WM_PAINT:OnPaint,
win32con.WM_CLOSE:OnClose,
win32con.WM_DESTROY:OnDestroy
}
def CreateWindow(title,message_map,(l,t,r,b)):
"""Create a window with defined title, message map, and rectangle"""
wc = win32gui.WNDCLASS()
wc.lpszClassName = 'test_win32gui_1'
wc.style = win32con.CS_GLOBALCLASS|win32con.CS_VREDRAW | win32con.CS_HREDRAW
wc.hbrBackground = win32con.COLOR_WINDOW+1
wc.hCursor = win32gui.LoadCursor( 0, win32con.IDC_ARROW )
wc.lpfnWndProc=message_map
class_atom=win32gui.RegisterClass(wc)
hwnd = win32gui.CreateWindow(wc.lpszClassName,
title,
win32con.WS_CAPTION|win32con.WS_VISIBLE|win32con.WS_SYSMENU,
l,t,r,b, 0, 0, 0, None)
while win32gui.PumpWaitingMessages() == 0:
time.sleep(0.01)
win32gui.UnregisterClass(wc.lpszClassName, None)
#Display sample window
CreateWindow('Pywin32 sample',wndproc,(100,100,500,200))