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 virtual ~OverView();
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 fMatchStr.appendUnichar(uni);
63 this->inval(NULL);
64 return true;
65 }
66 return this->INHERITED::onQuery(evt);
67 }
68
69 void onDraw(SkCanvas* canvas) override;
70
onSendClickToChildren(SkScalar x,SkScalar y,unsigned modi)71 bool onSendClickToChildren(SkScalar x, SkScalar y, unsigned modi) override {
72 return false;
73 }
74
onFindClickHandler(SkScalar cx,SkScalar cy,unsigned modi)75 Click* onFindClickHandler(SkScalar cx, SkScalar cy, unsigned modi) override {
76 const SkRect crect = SkRect::MakeXYWH(cx - 0.5f, cy - 0.5f, 1, 1);
77 SkPoint loc = this->start();
78 for (int i = 0; i < fCount; ++i) {
79 if (draw_this_name(fNames[i], fMatchStr)) {
80 if (this->bounds(loc).intersects(crect)) {
81 SkEvent evt("set-curr-index");
82 evt.setFast32(i);
83 this->sendEventToParents(evt);
84 break;
85 }
86 this->next(&loc);
87 }
88 }
89 return NULL;
90 }
91
92 private:
93 int fCount;
94 const SkViewFactory** fFactories;
95 SkString* fNames;
96 SkString fMatchStr;
97 SkPaint fNamePaint;
98 SkPaint::FontMetrics fNameMetrics;
99 SkScalar fNameW;
100 SkScalar fNameH;
101
bounds(const SkPoint & loc) const102 SkRect bounds(const SkPoint& loc) const {
103 return SkRect::MakeXYWH(loc.x(), loc.y() + fNameMetrics.fAscent, fNameW, fNameH);
104 }
105
start() const106 SkPoint start() const {
107 return SkPoint::Make(10, -fNameMetrics.fTop);
108 }
109
next(SkPoint * loc) const110 void next(SkPoint* loc) const {
111 loc->fY += fNameH;
112 if (loc->fY > this->height() - fNameMetrics.fBottom) {
113 loc->fY = -fNameMetrics.fTop;
114 loc->fX += fNameW;
115 }
116 }
117
118 typedef SkView INHERITED;
119 };
120
create_overview(int count,const SkViewFactory * factories[])121 SkView* create_overview(int count, const SkViewFactory* factories[]) {
122 return SkNEW_ARGS(OverView, (count, factories));
123 }
124
is_overview(SkView * view)125 bool is_overview(SkView* view) {
126 SkEvent isOverview(gIsOverview);
127 return view->doQuery(&isOverview);
128 }
129
OverView(int count,const SkViewFactory * factories[])130 OverView::OverView(int count, const SkViewFactory* factories[]) {
131 fCount = count;
132 fFactories = factories;
133
134 fNames = new SkString[count];
135 for (int i = 0; i < count; ++i) {
136 SkView* view = (*fFactories[i])();
137 if (view) {
138 (void)SampleCode::RequestTitle(view, &fNames[i]);
139 if (0 == fNames[i].find("GM:")) {
140 fNames[i].remove(0, 3);
141 }
142 }
143 }
144
145 fNamePaint.setAntiAlias(true);
146 fNamePaint.setTextSize(12);
147 fNameW = 160;
148 fNameH = fNamePaint.getFontMetrics(&fNameMetrics);
149 }
150
~OverView()151 OverView::~OverView() {
152 delete[] fNames;
153 }
154
onEvent(const SkEvent & evt)155 bool OverView::onEvent(const SkEvent& evt) {
156 return this->INHERITED::onEvent(evt);
157 }
158
onDraw(SkCanvas * canvas)159 void OverView::onDraw(SkCanvas* canvas) {
160 SkPaint paint;
161 paint.setColor(0xFFF8F8F8);
162 canvas->drawPaint(paint);
163
164 SkPoint loc = this->start();
165 for (int i = 0; i < fCount; ++i) {
166 if (draw_this_name(fNames[i], fMatchStr)) {
167 canvas->drawRect(this->bounds(loc), paint);
168 canvas->drawText(fNames[i].c_str(), fNames[i].size(), loc.x(), loc.y(), fNamePaint);
169 this->next(&loc);
170 }
171 }
172 }
173
174