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