mirror of
https://github.com/mirkobrombin/raven.git
synced 2026-11-05 21:56:33 +00:00
Raymond Bennett
e1fef47bd6
Every pointer move over a caption or border recalculated the client area and erased and repainted the window and all its controls, so a dialog flickered while the pointer moved over its title. Only a caption button changes there, and only the frame is drawn again for it. Fixes #123 Assisted-by: Claude Code:claude-opus-5-5 AI-Scope: reproduction under Xvfb, the fix to hover_frame, the native_frame_hover test and fixture
72 lines
2.6 KiB
C
72 lines
2.6 KiB
C
#define WIN32_LEAN_AND_MEAN
|
|
#include <windows.h>
|
|
|
|
// A window with a caption and a close button over one control, as a dialog without WS_CLIPCHILDREN is. Once both have painted, the
|
|
// pointer crossing the caption and lighting the close button changes only the frame: neither window hears WM_NCCALCSIZE, WM_ERASEBKGND
|
|
// or WM_PAINT again. The host moves the pointer, then posts WM_APP, and the counts come back as the exit code.
|
|
static unsigned frames,erases,paints,child_paints;
|
|
|
|
static LRESULT CALLBACK child_procedure(HWND window,UINT message,WPARAM wparam,LPARAM lparam)
|
|
{
|
|
if (message==WM_PAINT) {
|
|
PAINTSTRUCT paint;
|
|
HDC dc=BeginPaint(window,&paint);
|
|
FillRect(dc,&paint.rcPaint,(HBRUSH)GetStockObject(BLACK_BRUSH));
|
|
EndPaint(window,&paint);
|
|
++child_paints;
|
|
return 0;
|
|
}
|
|
return DefWindowProcW(window,message,wparam,lparam);
|
|
}
|
|
|
|
static LRESULT CALLBACK procedure(HWND window,UINT message,WPARAM wparam,LPARAM lparam)
|
|
{
|
|
if (message==WM_NCCALCSIZE) ++frames;
|
|
if (message==WM_ERASEBKGND) ++erases;
|
|
if (message==WM_PAINT) {
|
|
PAINTSTRUCT paint;
|
|
HDC dc=BeginPaint(window,&paint);
|
|
FillRect(dc,&paint.rcPaint,(HBRUSH)GetStockObject(WHITE_BRUSH));
|
|
EndPaint(window,&paint);
|
|
++paints;
|
|
return 0;
|
|
}
|
|
if (message==WM_APP) {
|
|
PostQuitMessage(frames ? 10 : erases ? 11 : paints ? 12 : child_paints ? 13 : 0);
|
|
return 0;
|
|
}
|
|
return DefWindowProcW(window,message,wparam,lparam);
|
|
}
|
|
|
|
int raven_entry(void)
|
|
{
|
|
WNDCLASSW definition={0};
|
|
definition.lpfnWndProc=procedure;
|
|
definition.hInstance=GetModuleHandleW(NULL);
|
|
definition.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
|
|
definition.lpszClassName=L"raven.frame.hover";
|
|
if (!RegisterClassW(&definition)) return 1;
|
|
definition.lpfnWndProc=child_procedure;
|
|
definition.hbrBackground=NULL;
|
|
definition.lpszClassName=L"raven.frame.hover.child";
|
|
if (!RegisterClassW(&definition)) return 2;
|
|
HWND window=CreateWindowExW(0,L"raven.frame.hover",L"frame hover",WS_POPUP | WS_CAPTION | WS_SYSMENU,40,50,300,200,NULL,NULL,
|
|
definition.hInstance,NULL);
|
|
if (!window) return 3;
|
|
HWND child=CreateWindowExW(0,L"raven.frame.hover.child",NULL,WS_CHILD | WS_VISIBLE,20,20,100,40,window,NULL,definition.hInstance,NULL);
|
|
if (!child) return 4;
|
|
ShowWindow(window,SW_SHOW);
|
|
UpdateWindow(window);
|
|
UpdateWindow(child);
|
|
RECT pending;
|
|
if (GetUpdateRect(window,&pending,FALSE) || GetUpdateRect(child,&pending,FALSE) || !paints || !child_paints) return 5;
|
|
frames=erases=paints=child_paints=0;
|
|
MSG message;
|
|
while (GetMessageW(&message,NULL,0,0)>0) {
|
|
TranslateMessage(&message);
|
|
DispatchMessageW(&message);
|
|
}
|
|
DestroyWindow(window);
|
|
return (int)message.wParam;
|
|
}
|