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Added SetNextWindowSizeConstraint() + demo code (#668)

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This commit is contained in:
ocornut
2016-05-21 22:53:08 +02:00
parent 753bf5cefe
commit b7ebeb1610
4 changed files with 103 additions and 8 deletions
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42
imgui_demo.cpp
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@ -46,6 +46,7 @@
#endif
#define IM_ARRAYSIZE(_ARR) ((int)(sizeof(_ARR)/sizeof(*_ARR)))
#define IM_MAX(_A,_B) (((_A) >= (_B)) ? (_A) : (_B))
//-----------------------------------------------------------------------------
// DEMO CODE
@ -59,6 +60,7 @@ static void ShowExampleAppLayout(bool* p_open);
static void ShowExampleAppPropertyEditor(bool* p_open);
static void ShowExampleAppLongText(bool* p_open);
static void ShowExampleAppAutoResize(bool* p_open);
static void ShowExampleAppConstrainedResize(bool* p_open);
static void ShowExampleAppFixedOverlay(bool* p_open);
static void ShowExampleAppManipulatingWindowTitle(bool* p_open);
static void ShowExampleAppCustomRendering(bool* p_open);
@ -105,6 +107,7 @@ void ImGui::ShowTestWindow(bool* p_open)
static bool show_app_property_editor = false;
static bool show_app_long_text = false;
static bool show_app_auto_resize = false;
static bool show_app_constrained_resize = false;
static bool show_app_fixed_overlay = false;
static bool show_app_manipulating_window_title = false;
static bool show_app_custom_rendering = false;
@ -120,6 +123,7 @@ void ImGui::ShowTestWindow(bool* p_open)
if (show_app_property_editor) ShowExampleAppPropertyEditor(&show_app_property_editor);
if (show_app_long_text) ShowExampleAppLongText(&show_app_long_text);
if (show_app_auto_resize) ShowExampleAppAutoResize(&show_app_auto_resize);
if (show_app_constrained_resize) ShowExampleAppConstrainedResize(&show_app_constrained_resize);
if (show_app_fixed_overlay) ShowExampleAppFixedOverlay(&show_app_fixed_overlay);
if (show_app_manipulating_window_title) ShowExampleAppManipulatingWindowTitle(&show_app_manipulating_window_title);
if (show_app_custom_rendering) ShowExampleAppCustomRendering(&show_app_custom_rendering);
@ -183,6 +187,7 @@ void ImGui::ShowTestWindow(bool* p_open)
ImGui::MenuItem("Property editor", NULL, &show_app_property_editor);
ImGui::MenuItem("Long text display", NULL, &show_app_long_text);
ImGui::MenuItem("Auto-resizing window", NULL, &show_app_auto_resize);
ImGui::MenuItem("Constrained-resizing window", NULL, &show_app_constrained_resize);
ImGui::MenuItem("Simple overlay", NULL, &show_app_fixed_overlay);
ImGui::MenuItem("Manipulating window title", NULL, &show_app_manipulating_window_title);
ImGui::MenuItem("Custom rendering", NULL, &show_app_custom_rendering);
@ -1793,6 +1798,43 @@ static void ShowExampleAppAutoResize(bool* p_open)
ImGui::End();
}
static void ShowExampleAppConstrainedResize(bool* p_open)
{
struct CustomConstraints // Helper functions to demonstrate programmatic constraints
{
static void Square(ImGuiSizeConstraintCallbackData* data) { data->DesiredSize = ImVec2(IM_MAX(data->DesiredSize.x, data->DesiredSize.y), IM_MAX(data->DesiredSize.x, data->DesiredSize.y)); }
static void Step(ImGuiSizeConstraintCallbackData* data) { float step = (float)(int)data->UserData; data->DesiredSize = ImVec2((int)(data->DesiredSize.x / step + 0.5f) * step, (int)(data->DesiredSize.y / step + 0.5f) * step); }
};
static int type = 0;
if (type == 0) ImGui::SetNextWindowSizeConstraint(ImVec2(-1, 0), ImVec2(-1, FLT_MAX)); // Vertical only
if (type == 1) ImGui::SetNextWindowSizeConstraint(ImVec2(0, -1), ImVec2(FLT_MAX, -1)); // Horizontal only
if (type == 2) ImGui::SetNextWindowSizeConstraint(ImVec2(100, 100), ImVec2(FLT_MAX, FLT_MAX)); // Width > 100, Height > 100
if (type == 3) ImGui::SetNextWindowSizeConstraint(ImVec2(300, 0), ImVec2(400, FLT_MAX)); // Width 300-400
if (type == 4) ImGui::SetNextWindowSizeConstraint(ImVec2(0, 0), ImVec2(FLT_MAX, FLT_MAX), CustomConstraints::Square); // Always Square
if (type == 5) ImGui::SetNextWindowSizeConstraint(ImVec2(0, 0), ImVec2(FLT_MAX, FLT_MAX), CustomConstraints::Step, (void*)100);// Fixed Step
if (ImGui::Begin("Example: Constrained Resize", p_open))
{
const char* desc[] =
{
"Resize vertical only",
"Resize horizontal only",
"Width > 100, Height > 100",
"Width 300-400",
"Custom: Always Square",
"Custom: Fixed Steps (100)",
};
ImGui::Combo("Constraint", &type, desc, IM_ARRAYSIZE(desc));
if (ImGui::Button("200x200")) ImGui::SetWindowSize(ImVec2(200,200)); ImGui::SameLine();
if (ImGui::Button("500x500")) ImGui::SetWindowSize(ImVec2(500,500)); ImGui::SameLine();
if (ImGui::Button("800x200")) ImGui::SetWindowSize(ImVec2(800,200));
for (int i = 0; i < 10; i++)
ImGui::Text("Hello, sailor! Making this line long enough for the example.");
}
ImGui::End();
}
static void ShowExampleAppFixedOverlay(bool* p_open)
{
ImGui::SetNextWindowPos(ImVec2(10,10));