d0cf5da20d
Sets UIPinchGestureRecognizer and UISwipeGestureRecognizers and passes the result down to the sk_app::Window. To simplify detection, swipes take precedence over pans, and pans require a single touch. This is less flexible for the app, but in most cases I think is what we want. Bug: skia:8737 Change-Id: Ib031b6ad465d3a353da29d7e0b48a666d4ff8b9a Reviewed-on: https://skia-review.googlesource.com/c/skia/+/239776 Commit-Queue: Jim Van Verth <jvanverth@google.com> Reviewed-by: Brian Osman <brianosman@google.com>
127 lines
3.6 KiB
C++
127 lines
3.6 KiB
C++
/*
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* Copyright 2016 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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#include "include/core/SkCanvas.h"
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#include "include/core/SkString.h"
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#include "samplecode/Sample.h"
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#if SK_SUPPORT_GPU
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# include "include/gpu/GrContext.h"
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#else
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class GrContext;
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#endif
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//////////////////////////////////////////////////////////////////////////////
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void Sample::setSize(SkScalar width, SkScalar height) {
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width = SkMaxScalar(0, width);
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height = SkMaxScalar(0, height);
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if (fWidth != width || fHeight != height)
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{
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fWidth = width;
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fHeight = height;
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this->onSizeChange();
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}
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}
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void Sample::draw(SkCanvas* canvas) {
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if (fWidth && fHeight) {
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SkRect r;
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r.setLTRB(0, 0, fWidth, fHeight);
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if (canvas->quickReject(r)) {
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return;
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}
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SkAutoCanvasRestore as(canvas, true);
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int sc = canvas->save();
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if (!fHaveCalledOnceBeforeDraw) {
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fHaveCalledOnceBeforeDraw = true;
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this->onOnceBeforeDraw();
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}
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this->onDrawBackground(canvas);
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SkAutoCanvasRestore acr(canvas, true);
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this->onDrawContent(canvas);
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#if SK_SUPPORT_GPU
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// Ensure the GrContext doesn't combine GrDrawOps across draw loops.
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if (GrContext* context = canvas->getGrContext()) {
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context->flush();
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}
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#endif
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canvas->restoreToCount(sc);
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}
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}
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////////////////////////////////////////////////////////////////////////////
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bool Sample::mouse(SkPoint point, skui::InputState clickState, skui::ModifierKey modifierKeys) {
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switch (clickState) {
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case skui::InputState::kDown:
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fClick = nullptr;
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if (point.x() < 0 || point.y() < 0 || point.x() >= fWidth || point.y() >= fHeight) {
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return false;
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}
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fClick.reset(this->onFindClickHandler(point.x(), point.y(), modifierKeys));
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if (!fClick) {
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return false;
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}
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fClick->fPrev = fClick->fCurr = fClick->fOrig = point;
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fClick->fState = skui::InputState::kDown;
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fClick->fModifierKeys = modifierKeys;
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this->onClick(fClick.get());
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return true;
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case skui::InputState::kMove:
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if (fClick) {
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fClick->fPrev = fClick->fCurr;
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fClick->fCurr = point;
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fClick->fState = skui::InputState::kMove;
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fClick->fModifierKeys = modifierKeys;
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return this->onClick(fClick.get());
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}
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return false;
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case skui::InputState::kUp:
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if (fClick) {
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fClick->fPrev = fClick->fCurr;
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fClick->fCurr = point;
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fClick->fState = skui::InputState::kUp;
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fClick->fModifierKeys = modifierKeys;
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bool result = this->onClick(fClick.get());
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fClick = nullptr;
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return result;
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}
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return false;
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default:
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// Ignore other cases
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SkASSERT(false);
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break;
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}
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SkASSERT(false);
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return false;
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}
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//////////////////////////////////////////////////////////////////////
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void Sample::onSizeChange() {}
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Sample::Click* Sample::onFindClickHandler(SkScalar x, SkScalar y, skui::ModifierKey modi) {
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return nullptr;
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}
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bool Sample::onClick(Click*) {
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return false;
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}
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void Sample::onDrawBackground(SkCanvas* canvas) {
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canvas->drawColor(fBGColor);
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}
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// need to explicitly declare this, or we get some weird infinite loop llist
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template SampleRegistry* SampleRegistry::gHead;
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