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Demo: Added a black and white gradient to Demo>Examples>Custom Rendering.

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This commit is contained in:
omar
2020-02-10 22:08:52 +01:00
parent d8948b5343
commit 70975fe44d
2 changed files with 25 additions and 2 deletions
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5
docs/CHANGELOG.txt
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@@ -38,7 +38,10 @@ Other Changes:
- ColorButton: Added ImGuiColorEditFlags_NoBorder flag to remove the border normally enforced
by default for standalone ColorButton.
- Backends: Added SDL2+Metal example application. (#3017) [@coding-jackalope]
- Demo: Added a black and white gradient to Demo>Examples>Custom Rendering.
- Backends: SDL: Added ImGui_ImplSDL2_InitForMetal() for API consistency (even though the function
currently does nothing).
- Examples: Added SDL2+Metal example application. (#3017) [@coding-jackalope]
-----------------------------------------------------------------------

22
imgui_demo.cpp
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@@ -4471,7 +4471,6 @@ static void ShowExampleAppCustomRendering(bool* p_open)
if (ImGui::SliderInt("Circle segments", &circle_segments_override_v, 3, 40))
circle_segments_override = true;
ImGui::ColorEdit4("Color", &colf.x);
ImGui::PopItemWidth();
const ImVec2 p = ImGui::GetCursorScreenPos();
const ImU32 col = ImColor(colf);
const float spacing = 10.0f;
@@ -4510,6 +4509,27 @@ static void ShowExampleAppCustomRendering(bool* p_open)
draw_list->AddRectFilled(ImVec2(x, y), ImVec2(x + 1, y + 1), col); x += sz; // Pixel (faster than AddLine)
draw_list->AddRectFilledMultiColor(ImVec2(x, y), ImVec2(x + sz, y + sz), IM_COL32(0, 0, 0, 255), IM_COL32(255, 0, 0, 255), IM_COL32(255, 255, 0, 255), IM_COL32(0, 255, 0, 255));
ImGui::Dummy(ImVec2((sz + spacing) * 9.8f, (sz + spacing) * 3));
// Draw black and white gradients
static int gradient_steps = 16;
ImGui::Separator();
ImGui::AlignTextToFramePadding();
ImGui::Text("Gradient steps");
ImGui::SameLine(); if (ImGui::RadioButton("16", gradient_steps == 16)) { gradient_steps = 16; }
ImGui::SameLine(); if (ImGui::RadioButton("32", gradient_steps == 32)) { gradient_steps = 32; }
ImGui::SameLine(); if (ImGui::RadioButton("256", gradient_steps == 256)) { gradient_steps = 256; }
ImVec2 gradient_size = ImVec2(ImGui::CalcItemWidth(), 64.0f);
x = ImGui::GetCursorScreenPos().x;
y = ImGui::GetCursorScreenPos().y;
for (int n = 0; n < gradient_steps; n++)
{
float f = n / (float)gradient_steps;
ImU32 col32 = ImGui::GetColorU32(ImVec4(f, f, f, 1.0f));
draw_list->AddRectFilled(ImVec2(x + gradient_size.x * (n / (float)gradient_steps), y), ImVec2(x + gradient_size.x * ((n+1) / (float)gradient_steps), y + gradient_size.y), col32);
}
ImGui::InvisibleButton("##gradient", gradient_size);
ImGui::PopItemWidth();
ImGui::EndTabItem();
}