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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkWidget.h"
#include "SkCanvas.h"
#include "SkMath.h"
#include "SkShader.h"
#include "SkInterpolator.h"
#include "SkTime.h"
SkProgressView::SkProgressView(uint32_t flags) : SkView(flags), fOnShader(NULL), fOffShader(NULL)
{
fValue = 0;
fMax = 0;
fInterp = NULL;
fDoInterp = false;
}
SkProgressView::~SkProgressView()
{
delete fInterp;
SkSafeUnref(fOnShader);
SkSafeUnref(fOffShader);
}
void SkProgressView::setMax(U16CPU max)
{
if (fMax != max)
{
fMax = SkToU16(max);
if (fValue > 0)
this->inval(NULL);
}
}
void SkProgressView::setValue(U16CPU value)
{
if (fValue != value)
{
if (fDoInterp)
{
if (fInterp)
delete fInterp;
fInterp = new SkInterpolator(1, 2);
SkScalar x = (SkScalar)(fValue << 8);
fInterp->setKeyFrame(0, SkTime::GetMSecs(), &x, 0);
x = (SkScalar)(value << 8);
fInterp->setKeyFrame(1, SkTime::GetMSecs() + 333, &x);
}
fValue = SkToU16(value);
this->inval(NULL);
}
}
void SkProgressView::onDraw(SkCanvas* canvas)
{
if (fMax == 0)
return;
SkFixed percent;
if (fInterp)
{
SkScalar x;
if (fInterp->timeToValues(SkTime::GetMSecs(), &x) == SkInterpolator::kFreezeEnd_Result)
{
delete fInterp;
fInterp = NULL;
}
percent = (SkFixed)x; // now its 16.8
percent = SkMax32(0, SkMin32(percent, fMax << 8)); // now its pinned
percent = SkFixedDiv(percent, fMax << 8); // now its 0.16
this->inval(NULL);
}
else
{
U16CPU value = SkMax32(0, SkMin32(fValue, fMax));
percent = SkFixedDiv(value, fMax);
}
SkRect r;
SkPaint p;
r.set(0, 0, this->width(), this->height());
p.setAntiAlias(true);
r.fRight = r.fLeft + SkScalarMul(r.width(), SkFixedToScalar(percent));
p.setStyle(SkPaint::kFill_Style);
p.setColor(SK_ColorDKGRAY);
p.setShader(fOnShader);
canvas->drawRect(r, p);
p.setColor(SK_ColorWHITE);
p.setShader(fOffShader);
r.fLeft = r.fRight;
r.fRight = this->width() - SK_Scalar1;
if (r.width() > 0)
canvas->drawRect(r, p);
}
#include "SkImageDecoder.h"
static SkShader* inflate_shader(const char file[])
{
SkBitmap bm;
return SkImageDecoder::DecodeFile(file, &bm) ?
SkShader::CreateBitmapShader(bm, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode) :
NULL;
}
void SkProgressView::onInflate(const SkDOM& dom, const SkDOM::Node* node)
{
this->INHERITED::onInflate(dom, node);
const char* s;
SkASSERT(fOnShader == NULL);
SkASSERT(fOffShader == NULL);
if ((s = dom.findAttr(node, "src-on")) != NULL)
fOnShader = inflate_shader(s);
if ((s = dom.findAttr(node, "src-off")) != NULL)
fOffShader = inflate_shader(s);
(void)dom.findBool(node, "do-interp", &fDoInterp);
}
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