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      1 /*
      2  * Copyright 2013 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 "gm.h"
      8 #include "sk_tool_utils.h"
      9 
     10 #include "SkAnnotation.h"
     11 #include "SkData.h"
     12 
     13 namespace skiagm {
     14 
     15 /** Draws two rectangles. In output formats that support internal links (PDF),
     16  *  clicking the one labeled "Link to A" should take you to the one labeled
     17  *  "Target A". Note that you'll need to zoom your PDF viewer in a fair bit in
     18  *  order for the scrolling to not be blocked by the edge of the document.
     19  */
     20 class InternalLinksGM : public GM {
     21 public:
     22     InternalLinksGM() {
     23         this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
     24     }
     25 
     26 protected:
     27     virtual SkString onShortName() {
     28         return SkString("internal_links");
     29     }
     30 
     31     virtual SkISize onISize() {
     32         return SkISize::Make(700, 500);
     33     }
     34 
     35     virtual void onDraw(SkCanvas* canvas) {
     36         sk_sp<SkData> name(SkData::MakeWithCString("target-a"));
     37 
     38         canvas->save();
     39         canvas->translate(SkIntToScalar(100), SkIntToScalar(100));
     40         drawLabeledRect(canvas, "Link to A", 0, 0);
     41         SkRect rect = SkRect::MakeXYWH(0, 0, SkIntToScalar(50), SkIntToScalar(20));
     42         SkAnnotateLinkToDestination(canvas, rect, name.get());
     43         canvas->restore();
     44 
     45         canvas->save();
     46         canvas->translate(SkIntToScalar(200), SkIntToScalar(200));
     47         SkPoint point = SkPoint::Make(SkIntToScalar(100), SkIntToScalar(50));
     48         drawLabeledRect(canvas, "Target A", point.x(), point.y());
     49         SkAnnotateNamedDestination(canvas, point, name.get());
     50         canvas->restore();
     51     }
     52 
     53 private:
     54     /** Draw an arbitrary rectangle at a given location and label it with some
     55      *  text. */
     56     void drawLabeledRect(SkCanvas* canvas, const char* text, SkScalar x, SkScalar y) {
     57         SkPaint paint;
     58         paint.setColor(SK_ColorBLUE);
     59         SkRect rect = SkRect::MakeXYWH(x, y,
     60                                        SkIntToScalar(50), SkIntToScalar(20));
     61         canvas->drawRect(rect, paint);
     62 
     63         paint.setAntiAlias(true);
     64         sk_tool_utils::set_portable_typeface(&paint);
     65         paint.setTextSize(SkIntToScalar(25));
     66         paint.setColor(SK_ColorBLACK);
     67         canvas->drawString(text, x, y, paint);
     68     }
     69 
     70     typedef GM INHERITED;
     71 };
     72 
     73 //////////////////////////////////////////////////////////////////////////////
     74 
     75 static GM* MyFactory(void*) { return new InternalLinksGM; }
     76 static GMRegistry reg(MyFactory);
     77 
     78 }
     79