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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkView.h"
#include "SkCanvas.h"
#include "SkTo.h"
static inline uint32_t SkSetClearShift(uint32_t bits, bool cond, unsigned shift) {
SkASSERT((int)cond == 0 || (int)cond == 1);
return (bits & ~(1 << shift)) | ((int)cond << shift);
}
////////////////////////////////////////////////////////////////////////
SkView::SkView(uint32_t flags) : fFlags(SkToU8(flags)) {
fWidth = fHeight = 0;
}
SkView::~SkView() {}
void SkView::setFlags(uint32_t flags) {
SkASSERT((flags & ~kAllFlagMasks) == 0);
fFlags = SkToU8(flags);
}
void SkView::setVisibleP(bool pred) {
this->setFlags(SkSetClearShift(fFlags, pred, kVisible_Shift));
}
void SkView::setClipToBounds(bool pred) {
this->setFlags(SkSetClearShift(fFlags, !pred, kNoClip_Shift));
}
void SkView::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 SkView::draw(SkCanvas* canvas) {
if (fWidth && fHeight && this->isVisible()) {
SkRect r;
r.set(0, 0, fWidth, fHeight);
if (this->isClipToBounds() && canvas->quickReject(r)) {
return;
}
SkAutoCanvasRestore as(canvas, true);
if (this->isClipToBounds()) {
canvas->clipRect(r);
}
int sc = canvas->save();
this->onDraw(canvas);
canvas->restoreToCount(sc);
}
}
////////////////////////////////////////////////////////////////////////////
SkView::Click::Click(SkView* target) {
SkASSERT(target);
fTargetID = target->getSinkID();
}
SkView::Click::~Click() {}
SkView::Click* SkView::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 SkView::DoClickDown(Click* click, int x, int y, unsigned modi) {
SkASSERT(click);
SkView* target = (SkView*)SkEventSink::FindSink(click->fTargetID);
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 SkView::DoClickMoved(Click* click, int x, int y, unsigned modi) {
SkASSERT(click);
SkView* target = (SkView*)SkEventSink::FindSink(click->fTargetID);
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 SkView::DoClickUp(Click* click, int x, int y, unsigned modi) {
SkASSERT(click);
SkView* target = (SkView*)SkEventSink::FindSink(click->fTargetID);
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 SkView::onDraw(SkCanvas* canvas) {}
void SkView::onSizeChange() {}
SkView::Click* SkView::onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) {
return nullptr;
}
bool SkView::onClick(Click*) {
return false;
}
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