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comparison: gfx/skia/trunk/src/views/SkProgressView.cpp
gfx/skia/trunk/src/views/SkProgressView.cpp
- changeset 0
- 6474c204b198
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| -1:000000000000 | 0:30c9af153b31 |
|---|---|
| 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 "SkWidget.h" | |
| 9 #include "SkCanvas.h" | |
| 10 #include "SkMath.h" | |
| 11 #include "SkShader.h" | |
| 12 #include "SkInterpolator.h" | |
| 13 #include "SkTime.h" | |
| 14 | |
| 15 SkProgressView::SkProgressView(uint32_t flags) : SkView(flags), fOnShader(NULL), fOffShader(NULL) | |
| 16 { | |
| 17 fValue = 0; | |
| 18 fMax = 0; | |
| 19 fInterp = NULL; | |
| 20 fDoInterp = false; | |
| 21 } | |
| 22 | |
| 23 SkProgressView::~SkProgressView() | |
| 24 { | |
| 25 delete fInterp; | |
| 26 SkSafeUnref(fOnShader); | |
| 27 SkSafeUnref(fOffShader); | |
| 28 } | |
| 29 | |
| 30 void SkProgressView::setMax(U16CPU max) | |
| 31 { | |
| 32 if (fMax != max) | |
| 33 { | |
| 34 fMax = SkToU16(max); | |
| 35 if (fValue > 0) | |
| 36 this->inval(NULL); | |
| 37 } | |
| 38 } | |
| 39 | |
| 40 void SkProgressView::setValue(U16CPU value) | |
| 41 { | |
| 42 if (fValue != value) | |
| 43 { | |
| 44 if (fDoInterp) | |
| 45 { | |
| 46 if (fInterp) | |
| 47 delete fInterp; | |
| 48 fInterp = new SkInterpolator(1, 2); | |
| 49 SkScalar x = (SkScalar)(fValue << 8); | |
| 50 fInterp->setKeyFrame(0, SkTime::GetMSecs(), &x, 0); | |
| 51 x = (SkScalar)(value << 8); | |
| 52 fInterp->setKeyFrame(1, SkTime::GetMSecs() + 333, &x); | |
| 53 } | |
| 54 fValue = SkToU16(value); | |
| 55 this->inval(NULL); | |
| 56 } | |
| 57 } | |
| 58 | |
| 59 void SkProgressView::onDraw(SkCanvas* canvas) | |
| 60 { | |
| 61 if (fMax == 0) | |
| 62 return; | |
| 63 | |
| 64 SkFixed percent; | |
| 65 | |
| 66 if (fInterp) | |
| 67 { | |
| 68 SkScalar x; | |
| 69 if (fInterp->timeToValues(SkTime::GetMSecs(), &x) == SkInterpolator::kFreezeEnd_Result) | |
| 70 { | |
| 71 delete fInterp; | |
| 72 fInterp = NULL; | |
| 73 } | |
| 74 percent = (SkFixed)x; // now its 16.8 | |
| 75 percent = SkMax32(0, SkMin32(percent, fMax << 8)); // now its pinned | |
| 76 percent = SkFixedDiv(percent, fMax << 8); // now its 0.16 | |
| 77 this->inval(NULL); | |
| 78 } | |
| 79 else | |
| 80 { | |
| 81 U16CPU value = SkMax32(0, SkMin32(fValue, fMax)); | |
| 82 percent = SkFixedDiv(value, fMax); | |
| 83 } | |
| 84 | |
| 85 | |
| 86 SkRect r; | |
| 87 SkPaint p; | |
| 88 | |
| 89 r.set(0, 0, this->width(), this->height()); | |
| 90 p.setAntiAlias(true); | |
| 91 | |
| 92 r.fRight = r.fLeft + SkScalarMul(r.width(), SkFixedToScalar(percent)); | |
| 93 p.setStyle(SkPaint::kFill_Style); | |
| 94 | |
| 95 p.setColor(SK_ColorDKGRAY); | |
| 96 p.setShader(fOnShader); | |
| 97 canvas->drawRect(r, p); | |
| 98 | |
| 99 p.setColor(SK_ColorWHITE); | |
| 100 p.setShader(fOffShader); | |
| 101 r.fLeft = r.fRight; | |
| 102 r.fRight = this->width() - SK_Scalar1; | |
| 103 if (r.width() > 0) | |
| 104 canvas->drawRect(r, p); | |
| 105 } | |
| 106 | |
| 107 #include "SkImageDecoder.h" | |
| 108 | |
| 109 static SkShader* inflate_shader(const char file[]) | |
| 110 { | |
| 111 SkBitmap bm; | |
| 112 | |
| 113 return SkImageDecoder::DecodeFile(file, &bm) ? | |
| 114 SkShader::CreateBitmapShader(bm, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode) : | |
| 115 NULL; | |
| 116 } | |
| 117 | |
| 118 void SkProgressView::onInflate(const SkDOM& dom, const SkDOM::Node* node) | |
| 119 { | |
| 120 this->INHERITED::onInflate(dom, node); | |
| 121 | |
| 122 const char* s; | |
| 123 | |
| 124 SkASSERT(fOnShader == NULL); | |
| 125 SkASSERT(fOffShader == NULL); | |
| 126 | |
| 127 if ((s = dom.findAttr(node, "src-on")) != NULL) | |
| 128 fOnShader = inflate_shader(s); | |
| 129 if ((s = dom.findAttr(node, "src-off")) != NULL) | |
| 130 fOffShader = inflate_shader(s); | |
| 131 (void)dom.findBool(node, "do-interp", &fDoInterp); | |
| 132 } |
