Sources_For_Win/ParaView/Lib/site-packages/win32/Demos/win32gui_demo.py

# The start of a win32gui generic demo.
# Feel free to contribute more demos back ;-)

import win32gui, win32con, win32api
import time, math, random

def _MyCallback( hwnd, extra ):
    hwnds, classes = extra
    hwnds.append(hwnd)
    classes[win32gui.GetClassName(hwnd)] = 1

def TestEnumWindows():
    windows = []
    classes = {}
    win32gui.EnumWindows(_MyCallback, (windows, classes))
    print("Enumerated a total of %d windows with %d classes" % (len(windows),len(classes)))
    if "tooltips_class32" not in classes:
        print("Hrmmmm - I'm very surprised to not find a 'tooltips_class32' class.")


def OnPaint_1(hwnd, msg, wp, lp):
    dc, ps=win32gui.BeginPaint(hwnd)
    win32gui.SetGraphicsMode(dc, win32con.GM_ADVANCED)
    br=win32gui.CreateSolidBrush(win32api.RGB(255,0,0))
    win32gui.SelectObject(dc, br)
    angle=win32gui.GetWindowLong(hwnd, win32con.GWL_USERDATA)
    win32gui.SetWindowLong(hwnd, win32con.GWL_USERDATA, angle+2)
    r_angle=angle*(math.pi/180)
    win32gui.SetWorldTransform(dc,
        {'M11':math.cos(r_angle), 'M12':math.sin(r_angle), 'M21':math.sin(r_angle)*-1, 'M22':math.cos(r_angle),'Dx':250,'Dy':250})
    win32gui.MoveToEx(dc,250,250)
    win32gui.BeginPath(dc)
    win32gui.Pie(dc, 10, 70, 200, 200, 350, 350, 75, 10)
    win32gui.Chord(dc, 200, 200, 850, 0, 350, 350, 75, 10)
    win32gui.LineTo(dc, 300,300)
    win32gui.LineTo(dc, 100, 20)
    win32gui.LineTo(dc, 20, 100)
    win32gui.LineTo(dc, 400, 0)
    win32gui.LineTo(dc, 0, 400)
    win32gui.EndPath(dc)
    win32gui.StrokeAndFillPath(dc)
    win32gui.EndPaint(hwnd, ps)
    return 0
wndproc_1={win32con.WM_PAINT:OnPaint_1}

def OnPaint_2(hwnd, msg, wp, lp):
    dc, ps=win32gui.BeginPaint(hwnd)
    win32gui.SetGraphicsMode(dc, win32con.GM_ADVANCED)
    l,t,r,b=win32gui.GetClientRect(hwnd)
    
    for x in range(25):
        vertices=(
            {'x':int(random.random()*r), 'y':int(random.random()*b), 'Red':int(random.random()*0xff00), 'Green':0, 'Blue':0, 'Alpha':0},
            {'x':int(random.random()*r), 'y':int(random.random()*b), 'Red':0, 'Green':int(random.random()*0xff00), 'Blue':0, 'Alpha':0},
            {'x':int(random.random()*r), 'y':int(random.random()*b), 'Red':0, 'Green':0, 'Blue':int(random.random()*0xff00), 'Alpha':0},
            )
        mesh=((0,1,2),)
        win32gui.GradientFill(dc,vertices, mesh, win32con.GRADIENT_FILL_TRIANGLE)
    win32gui.EndPaint(hwnd, ps)
    return 0
wndproc_2={win32con.WM_PAINT:OnPaint_2}

def TestSetWorldTransform():
    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.lpfnWndProc=wndproc_1
    class_atom=win32gui.RegisterClass(wc)       
    hwnd = win32gui.CreateWindow(wc.lpszClassName,
        'Spin the Lobster!',
        win32con.WS_CAPTION|win32con.WS_VISIBLE,
        100,100,900,900, 0, 0, 0, None)
    for x in range(500):
        win32gui.InvalidateRect(hwnd,None,True)
        win32gui.PumpWaitingMessages()
        time.sleep(0.01)
    win32gui.DestroyWindow(hwnd)
    win32gui.UnregisterClass(wc.lpszClassName, None)

def TestGradientFill():
    wc = win32gui.WNDCLASS()
    wc.lpszClassName = 'test_win32gui_2'
    wc.style =  win32con.CS_GLOBALCLASS|win32con.CS_VREDRAW | win32con.CS_HREDRAW
    wc.hbrBackground = win32con.COLOR_WINDOW+1
    wc.lpfnWndProc=wndproc_2
    class_atom=win32gui.RegisterClass(wc)       
    hwnd = win32gui.CreateWindowEx(0, class_atom,'Kaleidoscope',
        win32con.WS_CAPTION|win32con.WS_VISIBLE|win32con.WS_THICKFRAME|win32con.WS_SYSMENU,
        100,100,900,900, 0, 0, 0, None)
    s=win32gui.GetWindowLong(hwnd,win32con.GWL_EXSTYLE)
    win32gui.SetWindowLong(hwnd, win32con.GWL_EXSTYLE, s|win32con.WS_EX_LAYERED)
    win32gui.SetLayeredWindowAttributes(hwnd, 0, 175, win32con.LWA_ALPHA)
    for x in range(30):
        win32gui.InvalidateRect(hwnd,None,True)
        win32gui.PumpWaitingMessages()
        time.sleep(0.3)
    win32gui.DestroyWindow(hwnd)
    win32gui.UnregisterClass(class_atom,None)

print("Enumerating all windows...")
TestEnumWindows()
print("Testing drawing functions ...")
TestSetWorldTransform()
TestGradientFill()
print("All tests done!")