reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame^] | 1 | #include "SkWidget.h" |
| 2 | #include "SkCanvas.h" |
| 3 | #include "SkShader.h" |
| 4 | #include "SkInterpolator.h" |
| 5 | #include "SkTime.h" |
| 6 | |
| 7 | SkProgressView::SkProgressView(uint32_t flags) : SkView(flags), fOnShader(NULL), fOffShader(NULL) |
| 8 | { |
| 9 | fValue = 0; |
| 10 | fMax = 0; |
| 11 | fInterp = NULL; |
| 12 | fDoInterp = false; |
| 13 | } |
| 14 | |
| 15 | SkProgressView::~SkProgressView() |
| 16 | { |
| 17 | delete fInterp; |
| 18 | fOnShader->safeUnref(); |
| 19 | fOffShader->safeUnref(); |
| 20 | } |
| 21 | |
| 22 | void SkProgressView::setMax(U16CPU max) |
| 23 | { |
| 24 | if (fMax != max) |
| 25 | { |
| 26 | fMax = SkToU16(max); |
| 27 | if (fValue > 0) |
| 28 | this->inval(NULL); |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | void SkProgressView::setValue(U16CPU value) |
| 33 | { |
| 34 | if (fValue != value) |
| 35 | { |
| 36 | if (fDoInterp) |
| 37 | { |
| 38 | if (fInterp) |
| 39 | delete fInterp; |
| 40 | fInterp = new SkInterpolator(1, 2); |
| 41 | SkScalar x = (SkScalar)(fValue << 8); |
| 42 | fInterp->setKeyFrame(0, SkTime::GetMSecs(), &x, 0); |
| 43 | x = (SkScalar)(value << 8); |
| 44 | fInterp->setKeyFrame(1, SkTime::GetMSecs() + 333, &x); |
| 45 | } |
| 46 | fValue = SkToU16(value); |
| 47 | this->inval(NULL); |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | void SkProgressView::onDraw(SkCanvas* canvas) |
| 52 | { |
| 53 | if (fMax == 0) |
| 54 | return; |
| 55 | |
| 56 | SkFixed percent; |
| 57 | |
| 58 | if (fInterp) |
| 59 | { |
| 60 | SkScalar x; |
| 61 | if (fInterp->timeToValues(SkTime::GetMSecs(), &x) == SkInterpolator::kFreezeEnd_Result) |
| 62 | { |
| 63 | delete fInterp; |
| 64 | fInterp = NULL; |
| 65 | } |
| 66 | percent = (SkFixed)x; // now its 16.8 |
| 67 | percent = SkMax32(0, SkMin32(percent, fMax << 8)); // now its pinned |
| 68 | percent = SkFixedDiv(percent, fMax << 8); // now its 0.16 |
| 69 | this->inval(NULL); |
| 70 | } |
| 71 | else |
| 72 | { |
| 73 | U16CPU value = SkMax32(0, SkMin32(fValue, fMax)); |
| 74 | percent = SkFixedDiv(value, fMax); |
| 75 | } |
| 76 | |
| 77 | |
| 78 | SkRect r; |
| 79 | SkPaint p; |
| 80 | |
| 81 | r.set(0, 0, this->width(), this->height()); |
| 82 | p.setAntiAlias(true); |
| 83 | |
| 84 | r.fRight = r.fLeft + SkScalarMul(r.width(), SkFixedToScalar(percent)); |
| 85 | p.setStyle(SkPaint::kFill_Style); |
| 86 | |
| 87 | p.setColor(SK_ColorDKGRAY); |
| 88 | p.setShader(fOnShader); |
| 89 | canvas->drawRect(r, p); |
| 90 | |
| 91 | p.setColor(SK_ColorWHITE); |
| 92 | p.setShader(fOffShader); |
| 93 | r.fLeft = r.fRight; |
| 94 | r.fRight = this->width() - SK_Scalar1; |
| 95 | if (r.width() > 0) |
| 96 | canvas->drawRect(r, p); |
| 97 | } |
| 98 | |
| 99 | #include "SkImageDecoder.h" |
| 100 | |
| 101 | static SkShader* inflate_shader(const char file[]) |
| 102 | { |
| 103 | SkBitmap bm; |
| 104 | |
| 105 | return SkImageDecoder::DecodeFile(file, &bm) ? |
| 106 | SkShader::CreateBitmapShader(bm, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode) : |
| 107 | NULL; |
| 108 | } |
| 109 | |
| 110 | void SkProgressView::onInflate(const SkDOM& dom, const SkDOM::Node* node) |
| 111 | { |
| 112 | this->INHERITED::onInflate(dom, node); |
| 113 | |
| 114 | const char* s; |
| 115 | |
| 116 | SkASSERT(fOnShader == NULL); |
| 117 | SkASSERT(fOffShader == NULL); |
| 118 | |
| 119 | if ((s = dom.findAttr(node, "src-on")) != NULL) |
| 120 | fOnShader = inflate_shader(s); |
| 121 | if ((s = dom.findAttr(node, "src-off")) != NULL) |
| 122 | fOffShader = inflate_shader(s); |
| 123 | (void)dom.findBool(node, "do-interp", &fDoInterp); |
| 124 | } |
| 125 | |