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#include "SampleCode.h" 8#include "SkView.h" 9#include "SkBlurMaskFilter.h" 10#include "SkCanvas.h" 11#include "SkColorShader.h" 12#include "SkGradientShader.h" 13#include "SkGraphics.h" 14#include "SkPath.h" 15#include "SkRandom.h" 16#include "SkRegion.h" 17#include "SkShader.h" 18#include "SkUtils.h" 19#include "SkColorPriv.h" 20#include "SkColorFilter.h" 21#include "SkTime.h" 22#include "SkTypeface.h" 23#include "SkTextBox.h" 24#include "SkOSFile.h" 25#include "SkStream.h" 26#include "SkKey.h" 27 28extern void skia_set_text_gamma(float blackGamma, float whiteGamma); 29 30#if defined(SK_BUILD_FOR_WIN) && defined(SK_FONTHOST_WIN_GDI) 31extern SkTypeface* SkCreateTypefaceFromLOGFONT(const LOGFONT&); 32#endif 33 34static const char gText[] = 35 "When in the Course of human events it becomes necessary for one people " 36 "to dissolve the political bands which have connected them with another " 37 "and to assume among the powers of the earth, the separate and equal " 38 "station to which the Laws of Nature and of Nature's God entitle them, " 39 "a decent respect to the opinions of mankind requires that they should " 40 "declare the causes which impel them to the separation."; 41 42class TextBoxView : public SampleView { 43public: 44 TextBoxView() { 45#if defined(SK_BUILD_FOR_WIN) && defined(SK_FONTHOST_WIN_GDI) 46 LOGFONT lf; 47 sk_bzero(&lf, sizeof(lf)); 48 lf.lfHeight = 9; 49 SkTypeface* tf0 = SkCreateTypefaceFromLOGFONT(lf); 50 lf.lfHeight = 12; 51 SkTypeface* tf1 = SkCreateTypefaceFromLOGFONT(lf); 52 // we assert that different sizes should not affect which face we get 53 SkASSERT(tf0 == tf1); 54 tf0->unref(); 55 tf1->unref(); 56#endif 57 } 58 59protected: 60 // overrides from SkEventSink 61 virtual bool onQuery(SkEvent* evt) { 62 if (SampleCode::TitleQ(*evt)) { 63 SampleCode::TitleR(evt, "TextBox"); 64 return true; 65 } 66 return this->INHERITED::onQuery(evt); 67 } 68 69 void drawTest(SkCanvas* canvas, SkScalar w, SkScalar h, SkColor fg, SkColor bg) { 70 SkAutoCanvasRestore acr(canvas, true); 71 72 canvas->clipRect(SkRect::MakeWH(w, h)); 73 canvas->drawColor(bg); 74 SkScalar margin = 20; 75 SkTextBox tbox; 76 tbox.setMode(SkTextBox::kLineBreak_Mode); 77 tbox.setBox(margin, margin, 78 w - margin, h - margin); 79 tbox.setSpacing(SkIntToScalar(3)/3, 0); 80 81 SkPaint paint; 82 paint.setAntiAlias(true); 83 paint.setLCDRenderText(true); 84 paint.setColor(fg); 85 tbox.setText(gText, strlen(gText), paint); 86 87 for (int i = 9; i < 24; i += 2) { 88 paint.setTextSize(SkIntToScalar(i)); 89 tbox.draw(canvas); 90 canvas->translate(0, tbox.getTextHeight() + paint.getFontSpacing()); 91 } 92 } 93 94 virtual void onDrawContent(SkCanvas* canvas) { 95 SkScalar width = this->width() / 3; 96 drawTest(canvas, width, this->height(), SK_ColorBLACK, SK_ColorWHITE); 97 canvas->translate(width, 0); 98 drawTest(canvas, width, this->height(), SK_ColorWHITE, SK_ColorBLACK); 99 canvas->translate(width, 0); 100 drawTest(canvas, width, this->height()/2, SK_ColorGRAY, SK_ColorWHITE); 101 canvas->translate(0, this->height()/2); 102 drawTest(canvas, width, this->height()/2, SK_ColorGRAY, SK_ColorBLACK); 103 } 104 105private: 106 typedef SampleView INHERITED; 107}; 108 109////////////////////////////////////////////////////////////////////////////// 110 111static SkView* MyFactory() { return new TextBoxView; } 112static SkViewRegister reg(MyFactory); 113