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| 1 | |
| 2 /* | |
| 3 * Copyright 2011 Google Inc. | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 #include "SampleCode.h" | |
| 9 #include "SkView.h" | |
| 10 #include "SkCanvas.h" | |
| 11 #include "SkDevice.h" | |
| 12 #include "SkPaint.h" | |
| 13 #include "SkUnitMappers.h" | |
| 14 #include "SkCubicInterval.h" | |
| 15 | |
| 16 #include "SkWidgetViews.h" | |
| 17 | |
| 18 static SkStaticTextView* make_textview(SkView* parent, | |
| 19 const SkRect& bounds, | |
| 20 const SkPaint& paint) { | |
| 21 SkStaticTextView* view = new SkStaticTextView; | |
| 22 view->setMode(SkStaticTextView::kFixedSize_Mode); | |
| 23 view->setPaint(paint); | |
| 24 view->setVisibleP(true); | |
| 25 view->setSize(bounds.width(), bounds.height()); | |
| 26 view->setLoc(bounds.fLeft, bounds.fTop); | |
| 27 parent->attachChildToFront(view)->unref(); | |
| 28 return view; | |
| 29 } | |
| 30 | |
| 31 static void set_scalar(SkStaticTextView* view, SkScalar value) { | |
| 32 SkString str; | |
| 33 str.appendScalar(value); | |
| 34 view->setText(str); | |
| 35 } | |
| 36 | |
| 37 class UnitMapperView : public SampleView { | |
| 38 SkPoint fPts[4]; | |
| 39 SkMatrix fMatrix; | |
| 40 SkStaticTextView* fViews[4]; | |
| 41 | |
| 42 void setViews() { | |
| 43 set_scalar(fViews[0], fPts[1].fX); | |
| 44 set_scalar(fViews[1], fPts[1].fY); | |
| 45 set_scalar(fViews[2], fPts[2].fX); | |
| 46 set_scalar(fViews[3], fPts[2].fY); | |
| 47 } | |
| 48 | |
| 49 public: | |
| 50 UnitMapperView() { | |
| 51 fPts[0].set(0, 0); | |
| 52 fPts[1].set(SK_Scalar1 / 3, SK_Scalar1 / 3); | |
| 53 fPts[2].set(SK_Scalar1 * 2 / 3, SK_Scalar1 * 2 / 3); | |
| 54 fPts[3].set(SK_Scalar1, SK_Scalar1); | |
| 55 | |
| 56 fMatrix.setScale(SK_Scalar1 * 200, -SK_Scalar1 * 200); | |
| 57 fMatrix.postTranslate(SkIntToScalar(100), SkIntToScalar(300)); | |
| 58 | |
| 59 SkRect r = { | |
| 60 SkIntToScalar(350), SkIntToScalar(100), | |
| 61 SkIntToScalar(500), SkIntToScalar(130) | |
| 62 }; | |
| 63 SkPaint paint; | |
| 64 paint.setAntiAlias(true); | |
| 65 paint.setTextSize(SkIntToScalar(25)); | |
| 66 for (int i = 0; i < 4; i++) { | |
| 67 fViews[i] = make_textview(this, r, paint); | |
| 68 r.offset(0, r.height()); | |
| 69 } | |
| 70 this->setViews(); | |
| 71 } | |
| 72 | |
| 73 protected: | |
| 74 // overrides from SkEventSink | |
| 75 virtual bool onQuery(SkEvent* evt) { | |
| 76 if (SampleCode::TitleQ(*evt)) { | |
| 77 SampleCode::TitleR(evt, "UnitMapper"); | |
| 78 return true; | |
| 79 } | |
| 80 return this->INHERITED::onQuery(evt); | |
| 81 } | |
| 82 | |
| 83 virtual void onDrawContent(SkCanvas* canvas) { | |
| 84 SkPaint paint; | |
| 85 paint.setAntiAlias(true); | |
| 86 paint.setColor(0xFF8888FF); | |
| 87 | |
| 88 SkRect r = { 0, 0, SK_Scalar1, SK_Scalar1 }; | |
| 89 | |
| 90 canvas->concat(fMatrix); | |
| 91 canvas->drawRect(r, paint); | |
| 92 | |
| 93 paint.setColor(SK_ColorBLACK); | |
| 94 paint.setStyle(SkPaint::kStroke_Style); | |
| 95 paint.setStrokeWidth(0); | |
| 96 paint.setStrokeCap(SkPaint::kRound_Cap); | |
| 97 | |
| 98 SkPath path; | |
| 99 path.moveTo(fPts[0]); | |
| 100 path.cubicTo(fPts[1], fPts[2], fPts[3]); | |
| 101 canvas->drawPath(path, paint); | |
| 102 | |
| 103 paint.setColor(SK_ColorRED); | |
| 104 paint.setStrokeWidth(0); | |
| 105 canvas->drawLine(0, 0, SK_Scalar1, SK_Scalar1, paint); | |
| 106 | |
| 107 paint.setColor(SK_ColorBLUE); | |
| 108 paint.setStrokeWidth(SK_Scalar1 / 60); | |
| 109 for (int i = 0; i < 50; i++) { | |
| 110 SkScalar x = i * SK_Scalar1 / 49; | |
| 111 canvas->drawPoint(x, SkEvalCubicInterval(&fPts[1], x), paint); | |
| 112 } | |
| 113 | |
| 114 paint.setStrokeWidth(SK_Scalar1 / 20); | |
| 115 paint.setColor(SK_ColorGREEN); | |
| 116 canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, &fPts[1], paint); | |
| 117 } | |
| 118 | |
| 119 bool invertPt(SkScalar x, SkScalar y, SkPoint* result) { | |
| 120 if (NULL == result) | |
| 121 return true; | |
| 122 | |
| 123 SkMatrix m; | |
| 124 if (!fMatrix.invert(&m)) { | |
| 125 return false; | |
| 126 } | |
| 127 | |
| 128 m.mapXY(x, y, result); | |
| 129 return true; | |
| 130 } | |
| 131 | |
| 132 int hittest(SkScalar x, SkScalar y) { | |
| 133 SkPoint target = { x, y }; | |
| 134 SkPoint pts[2] = { fPts[1], fPts[2] }; | |
| 135 fMatrix.mapPoints(pts, 2); | |
| 136 for (int i = 0; i < 2; i++) { | |
| 137 if (SkPoint::Distance(pts[i], target) < SkIntToScalar(4)) { | |
| 138 return i + 1; | |
| 139 } | |
| 140 } | |
| 141 return -1; | |
| 142 } | |
| 143 | |
| 144 virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned)
SK_OVERRIDE { | |
| 145 fDragIndex = hittest(x, y); | |
| 146 return fDragIndex >= 0 ? new Click(this) : NULL; | |
| 147 } | |
| 148 | |
| 149 virtual bool onClick(Click* click) { | |
| 150 if (fDragIndex >= 0) { | |
| 151 if (!invertPt(click->fCurr.fX, click->fCurr.fY, | |
| 152 &fPts[fDragIndex])) { | |
| 153 return false; | |
| 154 } | |
| 155 | |
| 156 this->setViews(); | |
| 157 this->inval(NULL); | |
| 158 return true; | |
| 159 } | |
| 160 return false; | |
| 161 } | |
| 162 | |
| 163 private: | |
| 164 int fDragIndex; | |
| 165 | |
| 166 typedef SampleView INHERITED; | |
| 167 }; | |
| 168 | |
| 169 ////////////////////////////////////////////////////////////////////////////// | |
| 170 | |
| 171 static SkView* MyFactory() { return new UnitMapperView; } | |
| 172 static SkViewRegister reg(MyFactory); | |
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Chromium Code Reviews
Issue 288343009:
Remove unused (by clients) SkUnitMapper (https://codereview.chromium.org/283273002/) (Closed)
Base URL: https://skia.googlecode.com/svn/trunk