1 /*
2 * Copyright 2011 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "OverView.h"
9 #include "SampleCode.h"
10 #include "SkCanvas.h"
11 #include "SkView.h"
12
13 static const char gIsOverview[] = "is-overview";
14
to_lower(int c)15 static int to_lower(int c) {
16 if ('A' <= c && c <= 'Z') {
17 c = c - 'A' + 'a';
18 }
19 return c;
20 }
21
make_lc(SkString * str)22 static void make_lc(SkString* str) {
23 char* ptr = str->writable_str();
24 while (*ptr) {
25 *ptr = to_lower(*ptr);
26 ptr += 1;
27 }
28 }
29
case_insensitive_find(const SkString & base,const SkString & sub)30 static bool case_insensitive_find(const SkString& base, const SkString& sub) {
31 SkString lcBase(base);
32 SkString lcSub(sub);
33 make_lc(&lcBase);
34 make_lc(&lcSub);
35 return lcBase.find(lcSub.c_str()) >= 0;
36 }
37
draw_this_name(const SkString & name,const SkString & filter)38 static bool draw_this_name(const SkString& name, const SkString& filter) {
39 if (filter.isEmpty()) {
40 return true;
41 }
42 return case_insensitive_find(name, filter);
43 }
44
45 class OverView : public SkView {
46 public:
47 OverView(int count, const SkViewFactory* factories[]);
48 ~OverView() override;
49
50 protected:
51 bool onEvent(const SkEvent&) override;
onQuery(SkEvent * evt)52 bool onQuery(SkEvent* evt) override {
53 if (SampleCode::TitleQ(*evt)) {
54 SampleCode::TitleR(evt, "Overview");
55 return true;
56 }
57 if (evt->isType(gIsOverview)) {
58 return true;
59 }
60 SkUnichar uni;
61 if (SampleCode::CharQ(*evt, &uni)) {
62 if (uni >= ' ') {
63 fMatchStr.appendUnichar(uni);
64 }
65 this->inval(nullptr);
66 return true;
67 }
68 return this->INHERITED::onQuery(evt);
69 }
70
71 void onDraw(SkCanvas* canvas) override;
72
onSendClickToChildren(SkScalar x,SkScalar y,unsigned modi)73 bool onSendClickToChildren(SkScalar x, SkScalar y, unsigned modi) override {
74 return false;
75 }
76
onFindClickHandler(SkScalar cx,SkScalar cy,unsigned modi)77 Click* onFindClickHandler(SkScalar cx, SkScalar cy, unsigned modi) override {
78 const SkRect crect = SkRect::MakeXYWH(cx - 0.5f, cy - 0.5f, 1, 1);
79 SkPoint loc = this->start();
80 for (int i = 0; i < fCount; ++i) {
81 if (draw_this_name(fNames[i], fMatchStr)) {
82 if (this->bounds(loc).intersects(crect)) {
83 SkEvent evt("set-curr-index");
84 evt.setFast32(i);
85 this->sendEventToParents(evt);
86 break;
87 }
88 this->next(&loc);
89 }
90 }
91 return nullptr;
92 }
93
94 private:
95 int fCount;
96 const SkViewFactory** fFactories;
97 SkString* fNames;
98 SkString fMatchStr;
99 SkPaint fNamePaint;
100 SkPaint::FontMetrics fNameMetrics;
101 SkScalar fNameW;
102 SkScalar fNameH;
103
bounds(const SkPoint & loc) const104 SkRect bounds(const SkPoint& loc) const {
105 return SkRect::MakeXYWH(loc.x(), loc.y() + fNameMetrics.fAscent, fNameW, fNameH);
106 }
107
start() const108 SkPoint start() const {
109 return SkPoint::Make(10, -fNameMetrics.fTop);
110 }
111
next(SkPoint * loc) const112 void next(SkPoint* loc) const {
113 loc->fY += fNameH;
114 if (loc->fY > this->height() - fNameMetrics.fBottom) {
115 loc->fY = -fNameMetrics.fTop;
116 loc->fX += fNameW;
117 }
118 }
119
120 typedef SkView INHERITED;
121 };
122
create_overview(int count,const SkViewFactory * factories[])123 SkView* create_overview(int count, const SkViewFactory* factories[]) {
124 return new OverView(count, factories);
125 }
126
is_overview(SkView * view)127 bool is_overview(SkView* view) {
128 SkEvent isOverview(gIsOverview);
129 return view->doQuery(&isOverview);
130 }
131
OverView(int count,const SkViewFactory * factories[])132 OverView::OverView(int count, const SkViewFactory* factories[]) {
133 fCount = count;
134 fFactories = factories;
135
136 fNames = new SkString[count];
137 for (int i = 0; i < count; ++i) {
138 SkView* view = (*fFactories[i])();
139 if (view) {
140 (void)SampleCode::RequestTitle(view, &fNames[i]);
141 if (0 == fNames[i].find("GM:")) {
142 fNames[i].remove(0, 3);
143 }
144 }
145 }
146
147 fNamePaint.setAntiAlias(true);
148 fNamePaint.setTextSize(12);
149 fNameW = 160;
150 fNameH = fNamePaint.getFontMetrics(&fNameMetrics);
151 }
152
~OverView()153 OverView::~OverView() {
154 delete[] fNames;
155 }
156
onEvent(const SkEvent & evt)157 bool OverView::onEvent(const SkEvent& evt) {
158 return this->INHERITED::onEvent(evt);
159 }
160
onDraw(SkCanvas * canvas)161 void OverView::onDraw(SkCanvas* canvas) {
162 SkPaint paint;
163 paint.setColor(0xFFF8F8F8);
164 canvas->drawPaint(paint);
165
166 SkPoint loc = this->start();
167 for (int i = 0; i < fCount; ++i) {
168 if (draw_this_name(fNames[i], fMatchStr)) {
169 canvas->drawRect(this->bounds(loc), paint);
170 canvas->drawString(fNames[i], loc.x(), loc.y(), fNamePaint);
171 this->next(&loc);
172 }
173 }
174 }
175