// Tests scale mode with an additional copy for transparency. This will happen
// if we have a scaled textbox, for example. WebKit will create a new
// transparency layer, draw the text field, then draw the text into it, then
// composite this down with an opacity.
TEST(TransparencyWin, ScaleTransparency)
{
// Create an opaque white buffer.
OwnPtr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), 1));
FloatRect fullBuffer(0, 0, 16, 16);
src->context()->fillRect(fullBuffer, Color::white);
// Make another layer (which duplicates how WebKit will make this). We fill
// the top half with red, and have the layer be 50% opaque.
src->context()->beginTransparencyLayer(0.5);
FloatRect topHalf(0, 0, 16, 8);
src->context()->fillRect(topHalf, Color(0xFFFF0000));
// Scale by 2x.
src->context()->save();
AffineTransform scale;
scale.scale(2.0);
src->context()->concatCTM(scale);
// Make a layer inset two pixels (because of scaling, this is 2->14). And
// will it with 50% black.
{
TransparencyWin helper;
helper.init(src->context(),
TransparencyWin::OpaqueCompositeLayer,
TransparencyWin::ScaleTransform,
IntRect(1, 1, 6, 6));
helper.context()->fillRect(helper.drawRect(), Color(0x7f000000));
clearTopLayerAlphaChannel(helper.context());
helper.composite();
}
// Finish the layer.
src->context()->restore();
src->context()->endLayer();
Color redBackground(0xFFFF8080); // 50% red composited on white.
EXPECT_EQ(redBackground, getPixelAt(src->context(), 0, 0));
EXPECT_EQ(redBackground, getPixelAt(src->context(), 1, 1));
// Top half (minus two pixel border) should be 50% gray atop opaque
// red = 0xFF804141. Then that's composited with 50% transparency on solid
// white = 0xFFC0A1A1.
Color darkRed(0xFFBF8080);
EXPECT_EQ(darkRed, getPixelAt(src->context(), 2, 2));
EXPECT_EQ(darkRed, getPixelAt(src->context(), 7, 7));
// Bottom half (minus a two pixel border) should be a layer with 5% gray
// with another 50% opacity composited atop white.
Color darkWhite(0xFFBFBFBF);
EXPECT_EQ(darkWhite, getPixelAt(src->context(), 8, 8));
EXPECT_EQ(darkWhite, getPixelAt(src->context(), 13, 13));
Color white(0xFFFFFFFF); // Background in the lower-right.
EXPECT_EQ(white, getPixelAt(src->context(), 14, 14));
EXPECT_EQ(white, getPixelAt(src->context(), 15, 15));
}
//! [Quoting ModelView Tutorial]
// mymodel.cpp
QVariant MyModel::data(const QModelIndex &index, int role) const
{
int row = index.row();
int col = index.column();
// generate a log message when this method gets called
qDebug() << QString("row %1, col%2, role %3")
.arg(row).arg(col).arg(role);
switch(role){
case Qt::DisplayRole:
if (row == 0 && col == 1) return QString("<--left");
if (row == 1 && col == 1) return QString("right-->");
return QString("Row%1, Column%2")
.arg(row + 1)
.arg(col +1);
break;
case Qt::FontRole:
if (row == 0 && col == 0) //change font only for cell(0,0)
{
QFont boldFont;
boldFont.setBold(true);
return boldFont;
}
break;
case Qt::BackgroundRole:
if (row == 1 && col == 2) //change background only for cell(1,2)
{
QBrush redBackground(Qt::red);
return redBackground;
}
break;
case Qt::TextAlignmentRole:
if (row == 1 && col == 1) //change text alignment only for cell(1,1)
{
return Qt::AlignRight + Qt::AlignVCenter;
}
break;
case Qt::CheckStateRole:
if (row == 1 && col == 0) //add a checkbox to cell(1,0)
{
return Qt::Checked;
}
}
return QVariant();
}
