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Backends: Win32: fixed direct calls to platform_io.Platform_SetWindowPos()/Platform_SetWindowSize() on windows created by application (typically main viewport).

This commit is contained in:
ocornut 2024-09-16 13:56:25 +02:00
parent 8040c02b32
commit 44a74509af
2 changed files with 17 additions and 4 deletions
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19
backends/imgui_impl_win32.cpp
View File

@ -1158,11 +1158,20 @@ static ImVec2 ImGui_ImplWin32_GetWindowPos(ImGuiViewport* viewport)
return ImVec2((float)pos.x, (float)pos.y);
}
static void ImGui_ImplWin32_UpdateWin32StyleFromWindow(ImGuiViewport* viewport)
{
ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
vd->DwStyle = ::GetWindowLongW(vd->Hwnd, GWL_STYLE);
vd->DwExStyle = ::GetWindowLongW(vd->Hwnd, GWL_EXSTYLE);
}
static void ImGui_ImplWin32_SetWindowPos(ImGuiViewport* viewport, ImVec2 pos)
{
ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
IM_ASSERT(vd->Hwnd != 0);
RECT rect = { (LONG)pos.x, (LONG)pos.y, (LONG)pos.x, (LONG)pos.y };
if (viewport->Flags & ImGuiViewportFlags_OwnedByApp)
ImGui_ImplWin32_UpdateWin32StyleFromWindow(viewport); // Not our window, poll style before using
::AdjustWindowRectEx(&rect, vd->DwStyle, FALSE, vd->DwExStyle);
::SetWindowPos(vd->Hwnd, nullptr, rect.left, rect.top, 0, 0, SWP_NOZORDER | SWP_NOSIZE | SWP_NOACTIVATE);
}
@ -1181,6 +1190,8 @@ static void ImGui_ImplWin32_SetWindowSize(ImGuiViewport* viewport, ImVec2 size)
ImGui_ImplWin32_ViewportData* vd = (ImGui_ImplWin32_ViewportData*)viewport->PlatformUserData;
IM_ASSERT(vd->Hwnd != 0);
RECT rect = { 0, 0, (LONG)size.x, (LONG)size.y };
if (viewport->Flags & ImGuiViewportFlags_OwnedByApp)
ImGui_ImplWin32_UpdateWin32StyleFromWindow(viewport); // Not our window, poll style before using
::AdjustWindowRectEx(&rect, vd->DwStyle, FALSE, vd->DwExStyle); // Client to Screen
::SetWindowPos(vd->Hwnd, nullptr, 0, 0, rect.right - rect.left, rect.bottom - rect.top, SWP_NOZORDER | SWP_NOMOVE | SWP_NOACTIVATE);
}
@ -1227,14 +1238,14 @@ static void ImGui_ImplWin32_SetWindowAlpha(ImGuiViewport* viewport, float alpha)
IM_ASSERT(alpha >= 0.0f && alpha <= 1.0f);
if (alpha < 1.0f)
{
DWORD style = ::GetWindowLongW(vd->Hwnd, GWL_EXSTYLE) | WS_EX_LAYERED;
::SetWindowLongW(vd->Hwnd, GWL_EXSTYLE, style);
DWORD ex_style = ::GetWindowLongW(vd->Hwnd, GWL_EXSTYLE) | WS_EX_LAYERED;
::SetWindowLongW(vd->Hwnd, GWL_EXSTYLE, ex_style);
::SetLayeredWindowAttributes(vd->Hwnd, 0, (BYTE)(255 * alpha), LWA_ALPHA);
}
else
{
DWORD style = ::GetWindowLongW(vd->Hwnd, GWL_EXSTYLE) & ~WS_EX_LAYERED;
::SetWindowLongW(vd->Hwnd, GWL_EXSTYLE, style);
DWORD ex_style = ::GetWindowLongW(vd->Hwnd, GWL_EXSTYLE) & ~WS_EX_LAYERED;
::SetWindowLongW(vd->Hwnd, GWL_EXSTYLE, ex_style);
}
}

2
docs/CHANGELOG.txt
View File

@ -80,6 +80,8 @@ Docking+Viewports Branch:
- Viewports: fixed an issue where a window manually constrained to the main viewport while crossing
over main viewport bounds isn't translated properly. (#7985)
- Backends: Win32: fixed direct calls to platform_io.Platform_SetWindowPos()/Platform_SetWindowSize()
on windows created by application (typically main viewport).
- Backends: SDL3: added support for viewport->ParentViewportId field to support parenting
windows at OS level. (#7973) [@RT2code]