gm/internal_links.cpp

   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 }