void WhiteBoardColorChooser::drawSwapPixmap()
{
const int arrowHeight = m_swapPixmap.height() / 4.0f;
const int arrowWidth = m_swapPixmap.width() / 2.0f;
const int imageHeight = m_swapPixmap.height();
const int imageWidth = m_swapPixmap.width();
const QPointF arrowLeftPolyGon[3] = {
QPointF(0, arrowHeight),
QPointF(arrowHeight, 0),
QPointF(arrowHeight, arrowHeight*2)
};
const QPointF arrowDownPolyGon[3] = {
QPointF(imageWidth-arrowWidth, imageHeight-arrowHeight-1),
QPointF(imageWidth, imageHeight-arrowHeight-1),
QPointF(imageWidth-arrowHeight, imageHeight-1)
};
m_swapPixmap.fill(Qt::transparent);
QPainter tPainter(&m_swapPixmap);
tPainter.setBrush(Qt::black);
tPainter.drawPolygon(arrowLeftPolyGon, 3);
tPainter.drawPolygon(arrowDownPolyGon, 3);
QPoint tCenterLine(imageWidth-arrowHeight, arrowHeight);
tPainter.drawLine(tCenterLine,QPoint(arrowHeight, arrowHeight));
tPainter.drawLine(tCenterLine,QPoint(imageWidth-arrowHeight, imageWidth-arrowHeight));
tPainter.end();
}
////////////////////////////////////////////////////////
//渲染支撑到图像上
void SimpleSupport::draw(QImage* pImage) {
int ihalfSize = mSize/2;
float ihalfbase = mSize/1.73205081;
QPointF points[4];
QPainter tPainter(pImage);
tPainter.setPen(QColor(255,255,255));
tPainter.setBrush(QBrush(QColor(255,255,255)));
tPainter.setBackgroundMode(Qt::OpaqueMode);
switch(mType) {
case st_CIRCLE:
tPainter.drawEllipse(mPoint.x()-ihalfSize,mPoint.y()-ihalfSize,mSize,mSize);
break;
case st_SQUARE:
tPainter.fillRect(mPoint.x()-ihalfSize,mPoint.y()-ihalfSize,mSize,mSize,Qt::white);
break;
case st_TRIANGLE:
points[0].setX( mPoint.x()); points[0].setY(-ihalfSize + mPoint.y());
points[1].setX( ihalfbase + mPoint.x()); points[1].setY( ihalfSize + mPoint.y());
points[2].setX(-ihalfbase + mPoint.x()); points[2].setY( ihalfSize + mPoint.y());
tPainter.drawPolygon(points, 3);
break;
case st_DIAMOND:
points[0].setX( mPoint.x()); points[0].setY(-ihalfSize + mPoint.y());
points[1].setX( ihalfbase + mPoint.x()); points[1].setY( mPoint.y());
points[2].setX( mPoint.x()); points[2].setY( ihalfSize + mPoint.y());
points[3].setX(-ihalfbase + mPoint.x()); points[3].setY( mPoint.y());
tPainter.drawPolygon(points, 4);
break;
default:
break;
}
}
