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Demo: fixed resizing while maintaining aspect constraint

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in ShowExampleAppConstrainedResize
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imdongye 2024-09-30 02:42:18 +09:00 committed by GitHub
parent 29cff2be06
commit f59da1956e
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1 changed files with 24 additions and 2 deletions
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26
imgui_demo.cpp
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@ -9117,11 +9117,33 @@ static void ShowExampleAppConstrainedResize(bool* p_open)
static void AspectRatio(ImGuiSizeCallbackData* data) static void AspectRatio(ImGuiSizeCallbackData* data)
{ {
float aspect_ratio = *(float*)data->UserData; float aspect_ratio = *(float*)data->UserData;
data->DesiredSize.y = (float)(int)(data->DesiredSize.x / aspect_ratio); int current_cursor = ImGui::GetMouseCursor();
if(current_cursor == ImGuiMouseCursor_ResizeNWSE || current_cursor == ImGuiMouseCursor_ResizeNESW)
{
if(aspect_ratio > data->DesiredSize.x / data->DesiredSize.y)
data->DesiredSize.x = aspect_ratio * data->DesiredSize.y;
else
data->DesiredSize.y = data->DesiredSize.x / aspect_ratio;
}
else if(current_cursor == ImGuiMouseCursor_ResizeNS)
data->DesiredSize.x = aspect_ratio * data->DesiredSize.y;
else if(current_cursor == ImGuiMouseCursor_ResizeEW)
data->DesiredSize.y = data->DesiredSize.x / aspect_ratio;
} }
static void Square(ImGuiSizeCallbackData* data) static void Square(ImGuiSizeCallbackData* data)
{ {
data->DesiredSize.x = data->DesiredSize.y = IM_MAX(data->DesiredSize.x, data->DesiredSize.y); int current_cursor = ImGui::GetMouseCursor();
if(current_cursor == ImGuiMouseCursor_ResizeNWSE || current_cursor == ImGuiMouseCursor_ResizeNESW)
{
if(1.f > data->DesiredSize.x / data->DesiredSize.y)
data->DesiredSize.x = data->DesiredSize.y;
else
data->DesiredSize.y = data->DesiredSize.x;
}
else if(current_cursor == ImGuiMouseCursor_ResizeNS)
data->DesiredSize.x = data->DesiredSize.y;
else if(current_cursor == ImGuiMouseCursor_ResizeEW)
data->DesiredSize.y = data->DesiredSize.x;
} }
static void Step(ImGuiSizeCallbackData* data) static void Step(ImGuiSizeCallbackData* data)
{ {