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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Sample.h"
#include "SkCanvas.h"
#include "SkString.h"
#if SK_SUPPORT_GPU
# include "GrContext.h"
#else
class GrContext;
#endif
//////////////////////////////////////////////////////////////////////////////
Sample::Event::Event() : Event("") {}
Sample::Event::Event(const Event& that) {
*this = that;
}
Sample::Event::Event(const char type[]) : fType(type), f32(0) {
SkASSERT(type);
}
Sample::Event::~Event() {}
bool Sample::Event::isType(const char type[]) const {
return fType.equals(type);
}
const char* Sample::kCharEvtName = "SampleCode_Char_Event";
const char* Sample::kTitleEvtName = "SampleCode_Title_Event";
bool Sample::CharQ(const Event& evt, SkUnichar* outUni) {
if (evt.isType(kCharEvtName)) {
if (outUni) {
*outUni = evt.getFast32();
}
return true;
}
return false;
}
bool Sample::TitleQ(const Event& evt) {
return evt.isType(kTitleEvtName);
}
void Sample::TitleR(Event* evt, const char title[]) {
SkASSERT(evt && TitleQ(*evt));
evt->setString(kTitleEvtName, title);
}
bool Sample::RequestTitle(Sample* view, SkString* title) {
Event evt(kTitleEvtName);
if (view->doQuery(&evt)) {
title->set(evt.findString(kTitleEvtName));
return true;
}
return false;
}
///////////////////////////////////////////////////////////////////////////////
bool Sample::doEvent(const Event& evt) {
return this->onEvent(evt);
}
bool Sample::onEvent(const Event&) {
return false;
}
bool Sample::doQuery(Event* evt) {
SkASSERT(evt);
return this->onQuery(evt);
}
bool Sample::onQuery(Sample::Event* evt) {
return false;
}
////////////////////////////////////////////////////////////////////////
void Sample::setSize(SkScalar width, SkScalar height) {
width = SkMaxScalar(0, width);
height = SkMaxScalar(0, height);
if (fWidth != width || fHeight != height)
{
fWidth = width;
fHeight = height;
this->onSizeChange();
}
}
void Sample::draw(SkCanvas* canvas) {
if (fWidth && fHeight) {
SkRect r;
r.set(0, 0, fWidth, fHeight);
if (canvas->quickReject(r)) {
return;
}
SkAutoCanvasRestore as(canvas, true);
int sc = canvas->save();
if (!fHaveCalledOnceBeforeDraw) {
fHaveCalledOnceBeforeDraw = true;
this->onOnceBeforeDraw();
}
this->onDrawBackground(canvas);
SkAutoCanvasRestore acr(canvas, true);
this->onDrawContent(canvas);
#if SK_SUPPORT_GPU
// Ensure the GrContext doesn't combine GrDrawOps across draw loops.
if (GrContext* context = canvas->getGrContext()) {
context->flush();
}
#endif
canvas->restoreToCount(sc);
}
}
////////////////////////////////////////////////////////////////////////////
Sample::Click::Click(Sample* target) {
SkASSERT(target);
fTarget = sk_ref_sp(target);
}
Sample::Click::~Click() {}
Sample::Click* Sample::findClickHandler(SkScalar x, SkScalar y, unsigned modi) {
if (x < 0 || y < 0 || x >= fWidth || y >= fHeight) {
return nullptr;
}
return this->onFindClickHandler(x, y, modi);
}
void Sample::DoClickDown(Click* click, int x, int y, unsigned modi) {
SkASSERT(click);
Sample* target = click->fTarget.get();
if (nullptr == target) {
return;
}
click->fIOrig.set(x, y);
click->fICurr = click->fIPrev = click->fIOrig;
click->fOrig.iset(x, y);
click->fPrev = click->fCurr = click->fOrig;
click->fState = Click::kDown_State;
click->fModifierKeys = modi;
target->onClick(click);
}
void Sample::DoClickMoved(Click* click, int x, int y, unsigned modi) {
SkASSERT(click);
Sample* target = click->fTarget.get();
if (nullptr == target) {
return;
}
click->fIPrev = click->fICurr;
click->fICurr.set(x, y);
click->fPrev = click->fCurr;
click->fCurr.iset(x, y);
click->fState = Click::kMoved_State;
click->fModifierKeys = modi;
target->onClick(click);
}
void Sample::DoClickUp(Click* click, int x, int y, unsigned modi) {
SkASSERT(click);
Sample* target = click->fTarget.get();
if (nullptr == target) {
return;
}
click->fIPrev = click->fICurr;
click->fICurr.set(x, y);
click->fPrev = click->fCurr;
click->fCurr.iset(x, y);
click->fState = Click::kUp_State;
click->fModifierKeys = modi;
target->onClick(click);
}
//////////////////////////////////////////////////////////////////////
void Sample::onSizeChange() {}
Sample::Click* Sample::onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) {
return nullptr;
}
bool Sample::onClick(Click*) {
return false;
}
void Sample::onDrawBackground(SkCanvas* canvas) {
canvas->drawColor(fBGColor);
}
// need to explicitly declare this, or we get some weird infinite loop llist
template SampleRegistry* SampleRegistry::gHead;
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