ff2e8fe65f
replace() {
if git grep -q "$1")";
then sed -i -e "s#${1}#${2}#g" $(git grep -l "$1");
fi
}
replace 'k\([A-Za-z]*\)_InputState' 'InputState::k\1'
replace '\(\(sk_app::\|\)Window\|Sample\|\)::InputState' 'InputState'
Change-Id: I4cc18814fb1fbdd1f240aabba05aae79c54a4841
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/227642
Commit-Queue: Hal Canary <halcanary@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
Auto-Submit: Hal Canary <halcanary@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
138 lines
4.1 KiB
C++
138 lines
4.1 KiB
C++
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef ImGuiLayer_DEFINED
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#define ImGuiLayer_DEFINED
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#include "include/core/SkPaint.h"
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#include "include/private/SkTArray.h"
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#include "tools/sk_app/Window.h"
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#include "imgui.h"
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namespace ImGui {
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// Helper object for drawing in a widget region, with draggable points
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struct DragCanvas {
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DragCanvas(const void* id, SkPoint tl = { 0.0f, 0.0f }, SkPoint br = { 1.0f, 1.0f },
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float aspect = -1.0f)
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: fID(0), fDragging(false) {
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ImGui::PushID(id);
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fDrawList = ImGui::GetWindowDrawList();
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// Logical size
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SkScalar w = SkTAbs(br.fX - tl.fX),
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h = SkTAbs(br.fY - tl.fY);
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// Determine aspect ratio automatically by default
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if (aspect < 0) {
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aspect = h / w;
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}
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float availWidth = SkTMax(ImGui::GetContentRegionAvailWidth(), 1.0f);
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fPos = ImGui::GetCursorScreenPos();
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fSize = ImVec2(availWidth, availWidth * aspect);
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SkPoint local[4] = {
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{ tl.fX, tl.fY },
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{ br.fX, tl.fY },
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{ tl.fX, br.fY },
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{ br.fX, br.fY },
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};
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SkPoint screen[4] = {
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{ fPos.x , fPos.y },
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{ fPos.x + fSize.x, fPos.y },
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{ fPos.x , fPos.y + fSize.y },
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{ fPos.x + fSize.x, fPos.y + fSize.y },
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};
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fLocalToScreen.setPolyToPoly(local, screen, 4);
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fScreenToLocal.setPolyToPoly(screen, local, 4);
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}
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~DragCanvas() {
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ImGui::SetCursorScreenPos(ImVec2(fPos.x, fPos.y + fSize.y));
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ImGui::Spacing();
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ImGui::PopID();
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}
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void fillColor(ImU32 color) {
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fDrawList->AddRectFilled(fPos, ImVec2(fPos.x + fSize.x, fPos.y + fSize.y), color);
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}
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void dragPoint(SkPoint* p, bool tooltip = false, ImU32 color = 0xFFFFFFFF) {
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// Transform points from logical coordinates to screen coordinates
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SkPoint center = fLocalToScreen.mapXY(p->fX, p->fY);
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// Invisible 10x10 button
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ImGui::PushID(fID++);
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ImGui::SetCursorScreenPos(ImVec2(center.fX - 5, center.fY - 5));
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ImGui::InvisibleButton("", ImVec2(10, 10));
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if (ImGui::IsItemActive() && ImGui::IsMouseDragging()) {
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// Update screen position to track mouse, clamped to our area
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ImGuiIO& io = ImGui::GetIO();
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center.set(SkTPin(io.MousePos.x, fPos.x, fPos.x + fSize.x),
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SkTPin(io.MousePos.y, fPos.y, fPos.y + fSize.y));
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// Update local coordinates for the caller
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*p = fScreenToLocal.mapXY(center.fX, center.fY);
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fDragging = true;
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}
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if (tooltip && ImGui::IsItemHovered()) {
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ImGui::SetTooltip("x: %.3f\ny: %.3f", p->fX, p->fY);
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}
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ImGui::PopID();
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fScreenPoints.push_back(ImVec2(center.fX, center.fY));
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fDrawList->AddCircle(fScreenPoints.back(), 5.0f, color);
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}
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ImDrawList* fDrawList;
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// Location and dimensions (in screen coordinates)
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ImVec2 fPos;
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ImVec2 fSize;
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// Screen coordinates of points (for additional user drawing)
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SkSTArray<4, ImVec2, true> fScreenPoints;
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// To simplify dragPoint
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SkMatrix fLocalToScreen;
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SkMatrix fScreenToLocal;
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int fID;
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bool fDragging;
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};
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}
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class ImGuiLayer : public sk_app::Window::Layer {
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public:
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ImGuiLayer();
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~ImGuiLayer() override;
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typedef std::function<void(SkCanvas*)> SkiaWidgetFunc;
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void skiaWidget(const ImVec2& size, SkiaWidgetFunc func);
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void onAttach(sk_app::Window* window) override;
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void onPrePaint() override;
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void onPaint(SkSurface*) override;
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bool onMouse(int x, int y, InputState state, ModifierKey modifiers) override;
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bool onMouseWheel(float delta, ModifierKey modifiers) override;
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bool onKey(sk_app::Window::Key key, InputState state, ModifierKey modifiers) override;
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bool onChar(SkUnichar c, ModifierKey modifiers) override;
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private:
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sk_app::Window* fWindow;
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SkPaint fFontPaint;
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SkTArray<SkiaWidgetFunc> fSkiaWidgetFuncs;
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};
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#endif
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