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Demo: Rework Clipping section. Fix for static analysis. Added bindings in Readme.
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@ -2684,23 +2684,66 @@ static void ShowDemoWindowLayout()
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if (ImGui::TreeNode("Clipping"))
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{
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static ImVec2 size(100, 100), offset(50, 20);
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ImGui::TextWrapped(
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"On a per-widget basis we are occasionally clipping text CPU-side if it won't fit in its frame. "
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"Otherwise we are doing coarser clipping + passing a scissor rectangle to the renderer. "
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"The system is designed to try minimizing both execution and CPU/GPU rendering cost.");
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static ImVec2 size(100.0f, 100.0f);
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static ImVec2 offset(30.0f, 30.0f);
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ImGui::DragFloat2("size", (float*)&size, 0.5f, 1.0f, 200.0f, "%.0f");
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ImGui::TextWrapped("(Click and drag)");
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ImVec2 pos = ImGui::GetCursorScreenPos();
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ImVec4 clip_rect(pos.x, pos.y, pos.x + size.x, pos.y + size.y);
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ImGui::InvisibleButton("##empty", size);
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if (ImGui::IsItemActive() && ImGui::IsMouseDragging(0))
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ImGui::TextWrapped("(Click and drag to scroll)");
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for (int n = 0; n < 3; n++)
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{
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offset.x += ImGui::GetIO().MouseDelta.x;
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offset.y += ImGui::GetIO().MouseDelta.y;
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if (n > 0)
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ImGui::SameLine();
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ImGui::PushID(n);
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ImGui::BeginGroup(); // Lock X position
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ImGui::InvisibleButton("##empty", size);
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if (ImGui::IsItemActive() && ImGui::IsMouseDragging(ImGuiMouseButton_Left))
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{
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offset.x += ImGui::GetIO().MouseDelta.x;
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offset.y += ImGui::GetIO().MouseDelta.y;
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}
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const ImVec2 p0 = ImGui::GetItemRectMin();
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const ImVec2 p1 = ImGui::GetItemRectMax();
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const char* text_str = "Line 1 hello\nLine 2 clip me!";
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const ImVec2 text_pos = ImVec2(p0.x + offset.x, p0.y + offset.y);
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ImDrawList* draw_list = ImGui::GetWindowDrawList();
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switch (n)
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{
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case 0:
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HelpMarker(
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"Using ImGui::PushClipRect():\n"
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"Will alter ImGui hit-testing logic + ImDrawList rendering.\n"
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"(use this if you want your clipping rectangle to affect interactions)");
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ImGui::PushClipRect(p0, p1, true);
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draw_list->AddRectFilled(p0, p1, IM_COL32(90, 90, 120, 255));
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draw_list->AddText(text_pos, IM_COL32_WHITE, text_str);
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ImGui::PopClipRect();
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break;
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case 1:
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HelpMarker(
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"Using ImDrawList::PushClipRect():\n"
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"Will alter ImDrawList rendering only.\n"
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"(use this as a shortcut if you are only using ImDrawList calls)");
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draw_list->PushClipRect(p0, p1, true);
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draw_list->AddRectFilled(p0, p1, IM_COL32(90, 90, 120, 255));
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draw_list->AddText(text_pos, IM_COL32_WHITE, text_str);
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draw_list->PopClipRect();
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break;
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case 2:
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HelpMarker(
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"Using ImDrawList::AddText() with a fine ClipRect:\n"
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"Will alter only this specific ImDrawList::AddText() rendering.\n"
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"(this is often used internally to avoid altering the clipping rectangle and minimize draw calls)");
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ImVec4 clip_rect(p0.x, p0.y, p1.x, p1.y); // AddText() takes a ImVec4* here so let's convert.
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draw_list->AddRectFilled(p0, p1, IM_COL32(90, 90, 120, 255));
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draw_list->AddText(ImGui::GetFont(), ImGui::GetFontSize(), text_pos, IM_COL32_WHITE, text_str, NULL, 0.0f, &clip_rect);
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break;
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}
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ImGui::EndGroup();
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ImGui::PopID();
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}
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ImGui::GetWindowDrawList()->AddRectFilled(pos, ImVec2(pos.x + size.x, pos.y + size.y), IM_COL32(90, 90, 120, 255));
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ImGui::GetWindowDrawList()->AddText(ImGui::GetFont(), ImGui::GetFontSize()*2.0f, ImVec2(pos.x + offset.x, pos.y + offset.y), IM_COL32_WHITE, "Line 1 hello\nLine 2 clip me!", NULL, 0.0f, &clip_rect);
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ImGui::TreePop();
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}
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}
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