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BeginChild(): added ImGuiChildFlags_AutoResizeX, ImGuiChildFlags_AutoResizeY, ImGuiChildFlags_AlwaysAutoResize + support for SetNextWindowSizeConstraints(). (#1666, #1395, #1496, #1710) + Demo

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Note that child don't report ideal content size to parent so nesting may be difficult.
Note 4e4042b simplified SkipItems logic.
Note e2035a5 standardizing WindowMinSize application on child
This commit is contained in:
ocornut
2023-10-17 17:39:56 +02:00
parent 44345c2108
commit 0d3b468cb3
4 changed files with 79 additions and 14 deletions
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18
imgui_demo.cpp
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@ -2779,6 +2779,23 @@ static void ShowDemoWindowLayout()
ImGui::EndChild();
}
// Child 4: auto-resizing height with a limit
ImGui::SeparatorText("Auto-resize with constraints");
{
static int draw_lines = 3;
static int max_height_in_lines = 10;
ImGui::SetNextItemWidth(ImGui::GetFontSize() * 8);
ImGui::DragInt("Lines Count", &draw_lines, 0.2f);
ImGui::SetNextItemWidth(ImGui::GetFontSize() * 8);
ImGui::DragInt("Max Height (in Lines)", &max_height_in_lines, 0.2f);
ImGui::SetNextWindowSizeConstraints(ImVec2(0.0f, ImGui::GetTextLineHeightWithSpacing() * 1), ImVec2(FLT_MAX, ImGui::GetTextLineHeightWithSpacing() * max_height_in_lines));
if (ImGui::BeginChild("ConstrainedChild", ImVec2(-FLT_MIN, 0.0f), ImGuiChildFlags_Border | ImGuiChildFlags_AutoResizeY))
for (int n = 0; n < draw_lines; n++)
ImGui::Text("Line %04d", n);
ImGui::EndChild();
}
ImGui::SeparatorText("Misc/Advanced");
// Demonstrate a few extra things
@ -6605,6 +6622,7 @@ void ImGui::ShowStyleEditor(ImGuiStyle* ref)
"Left-click on color square to open color picker,\n"
"Right-click to open edit options menu.");
ImGui::SetNextWindowSizeConstraints(ImVec2(0.0f, ImGui::GetTextLineHeightWithSpacing() * 10), ImVec2(FLT_MAX, FLT_MAX));
ImGui::BeginChild("##colors", ImVec2(0, 0), ImGuiChildFlags_Border, ImGuiWindowFlags_AlwaysVerticalScrollbar | ImGuiWindowFlags_AlwaysHorizontalScrollbar | ImGuiWindowFlags_NavFlattened);
ImGui::PushItemWidth(ImGui::GetFontSize() * -12);
for (int i = 0; i < ImGuiCol_COUNT; i++)