我正在展示一个带动画的简单窗口(使用计时器)。
这是我正在使用的示例代码。当窗口显示时,它从右侧闪烁很多。虽然在隐藏期间,没有闪烁。此外,如果我删除WS_POPUP样式,则没有闪烁。
#include <windows.h>
#include <stdlib.h>
#include <string.h>
#include <tchar.h>
static TCHAR szWindowClass[] = _T("win32app");
HWND main_wnd_ = 0;
DWORD timer_id = 1000;
DWORD timer_id_2 = 1001;
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
BOOL
register_main_window_class(HINSTANCE hinstance) {
WNDCLASSEX wcx;
wcx.cbSize = sizeof(wcx);
wcx.style = CS_HREDRAW | CS_VREDRAW;
wcx.lpfnWndProc = WndProc;
wcx.cbClsExtra = 0;
wcx.cbWndExtra = 0;
wcx.hInstance = hinstance;
wcx.hIcon = 0;
wcx.hCursor = LoadCursor(NULL, IDC_ARROW);
wcx.hbrBackground = CreateSolidBrush(0xFF0000);
wcx.lpszMenuName = 0;
wcx.lpszClassName = _T("MainWndClass");
wcx.hIconSm = 0;
return RegisterClassEx(&wcx);
}
void CALLBACK show(HWND hwnd, UINT msg, UINT id, DWORD time) {
RECT r = { 0 };
::GetWindowRect(hwnd, &r);
if (r.left > 400) {
SetWindowPos(hwnd, 0, r.left - 10, r.top, r.right - r.left + 10, r.bottom - r.top, SWP_NOZORDER);
} else {
KillTimer(hwnd, timer_id);
}
}
void CALLBACK hide(HWND hwnd, UINT msg, UINT id, DWORD time) {
RECT r = { 0 };
::GetWindowRect(hwnd, &r);
if (r.left < 1500) {
SetWindowPos(hwnd, 0, r.left + 10, r.top, r.right - r.left - 10, r.bottom - r.top, SWP_NOZORDER);
} else {
DestroyWindow(hwnd);
KillTimer(hwnd, timer_id_2);
}
}
BOOL
create_main_window(HINSTANCE hinstance) {
main_wnd_ = CreateWindowEx(WS_EX_TOOLWINDOW | WS_EX_TOPMOST,
_T("MainWndClass"), _T(""),
WS_VISIBLE | WS_POPUP,
1500, 800, 0, 200,
0, 0, hinstance, 0);
if (!main_wnd_) {
return FALSE;
}
ShowWindow(main_wnd_, SW_SHOW);
UpdateWindow(main_wnd_);
SetTimer(main_wnd_, timer_id, 10, (TIMERPROC)show);
return TRUE;
}
int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
int x = 0;
if (!register_main_window_class(hInstance)) {
x = 0;
}
if (!create_main_window(hInstance)) {
x = 0;
}
MSG msg;
BOOL result;
while ((result = GetMessage(&msg, 0, 0, 0)) > 0) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 1;
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_DESTROY:
PostQuitMessage(0);
break;
case WM_LBUTTONDOWN:
SetTimer(main_wnd_, timer_id_2, 10, (TIMERPROC)hide);
break;
}
return DefWindowProc(hWnd, message, wParam, lParam);
}
答案 0 :(得分:1)
这是Win32 API中的一个严重问题。并没有简单的解决方案。
您可以尝试捕获toplevels WM_ENTERSIZEMOVE并使用WM_PRINT方法将控件绘制到位图中,然后使用(缩放的)位图并将对话框控件重绘为另一个位图,然后交换两个位图。
如果WM_PRINT不能用于某些第三方客户端控件(如所有MFC Feature Pack),则添加此双缓冲是很多工作并且不起作用。
但是当你完成它它工作正常。对于使MacOSX如此美观的所有其他快速GUI动画,您还需要这个。