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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 "OverView.h"
#include "SampleCode.h"
#include "SkCanvas.h"
#include "SkView.h"
static const char gIsOverview[] = "is-overview";
static int to_lower(int c) {
if ('A' <= c && c <= 'Z') {
c = c - 'A' + 'a';
}
return c;
}
static void make_lc(SkString* str) {
char* ptr = str->writable_str();
while (*ptr) {
*ptr = to_lower(*ptr);
ptr += 1;
}
}
static bool case_insensitive_find(const SkString& base, const SkString& sub) {
SkString lcBase(base);
SkString lcSub(sub);
make_lc(&lcBase);
make_lc(&lcSub);
return lcBase.find(lcSub.c_str()) >= 0;
}
static bool draw_this_name(const SkString& name, const SkString& filter) {
if (filter.isEmpty()) {
return true;
}
return case_insensitive_find(name, filter);
}
class OverView : public SkView {
public:
OverView(int count, const SkViewFactory* factories[]);
virtual ~OverView();
protected:
bool onEvent(const SkEvent&) override;
bool onQuery(SkEvent* evt) override {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Overview");
return true;
}
if (evt->isType(gIsOverview)) {
return true;
}
SkUnichar uni;
if (SampleCode::CharQ(*evt, &uni)) {
fMatchStr.appendUnichar(uni);
this->inval(nullptr);
return true;
}
return this->INHERITED::onQuery(evt);
}
void onDraw(SkCanvas* canvas) override;
bool onSendClickToChildren(SkScalar x, SkScalar y, unsigned modi) override {
return false;
}
Click* onFindClickHandler(SkScalar cx, SkScalar cy, unsigned modi) override {
const SkRect crect = SkRect::MakeXYWH(cx - 0.5f, cy - 0.5f, 1, 1);
SkPoint loc = this->start();
for (int i = 0; i < fCount; ++i) {
if (draw_this_name(fNames[i], fMatchStr)) {
if (this->bounds(loc).intersects(crect)) {
SkEvent evt("set-curr-index");
evt.setFast32(i);
this->sendEventToParents(evt);
break;
}
this->next(&loc);
}
}
return nullptr;
}
private:
int fCount;
const SkViewFactory** fFactories;
SkString* fNames;
SkString fMatchStr;
SkPaint fNamePaint;
SkPaint::FontMetrics fNameMetrics;
SkScalar fNameW;
SkScalar fNameH;
SkRect bounds(const SkPoint& loc) const {
return SkRect::MakeXYWH(loc.x(), loc.y() + fNameMetrics.fAscent, fNameW, fNameH);
}
SkPoint start() const {
return SkPoint::Make(10, -fNameMetrics.fTop);
}
void next(SkPoint* loc) const {
loc->fY += fNameH;
if (loc->fY > this->height() - fNameMetrics.fBottom) {
loc->fY = -fNameMetrics.fTop;
loc->fX += fNameW;
}
}
typedef SkView INHERITED;
};
SkView* create_overview(int count, const SkViewFactory* factories[]) {
return new OverView(count, factories);
}
bool is_overview(SkView* view) {
SkEvent isOverview(gIsOverview);
return view->doQuery(&isOverview);
}
OverView::OverView(int count, const SkViewFactory* factories[]) {
fCount = count;
fFactories = factories;
fNames = new SkString[count];
for (int i = 0; i < count; ++i) {
SkView* view = (*fFactories[i])();
if (view) {
(void)SampleCode::RequestTitle(view, &fNames[i]);
if (0 == fNames[i].find("GM:")) {
fNames[i].remove(0, 3);
}
}
}
fNamePaint.setAntiAlias(true);
fNamePaint.setTextSize(12);
fNameW = 160;
fNameH = fNamePaint.getFontMetrics(&fNameMetrics);
}
OverView::~OverView() {
delete[] fNames;
}
bool OverView::onEvent(const SkEvent& evt) {
return this->INHERITED::onEvent(evt);
}
void OverView::onDraw(SkCanvas* canvas) {
SkPaint paint;
paint.setColor(0xFFF8F8F8);
canvas->drawPaint(paint);
SkPoint loc = this->start();
for (int i = 0; i < fCount; ++i) {
if (draw_this_name(fNames[i], fMatchStr)) {
canvas->drawRect(this->bounds(loc), paint);
canvas->drawText(fNames[i].c_str(), fNames[i].size(), loc.x(), loc.y(), fNamePaint);
this->next(&loc);
}
}
}
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