24.02.2014, 19:13, "Sensei" <sense...@gmail.com>: > Dear all, > > in a previous post (Masked widget glitch) I asked suggestions about > making an arrow-like widget (see picture in [1]). The old and bad code > used a mask, but it had a glitch, as you see in the picture; however, > the workaround was easy: doing show, hide, show. Ugly but it worked. > > I was suggested to move my code to a new QWidget subclass, painting the > background, but now I'm finding it hard to create even the simplest form. > > What I've achieved so far is very lousy (see picture in [2]): the ugly > hack I've used before seems better than this one. > > Can anyone help me understand how to draw a good-looking widget?
You should enable antialiasing - it's generally impossible to draw good-looking triangular shapes without it. > > Thanks & Cheers! > > [1] https://dl.dropboxusercontent.com/u/15635416/mask.png > [2] https://dl.dropboxusercontent.com/u/15635416/paint.png > > ToolWindow::ToolWindow(QWidget *parent, QWidget *follow) : > QWidget(parent, Qt::FramelessWindowHint) > { > setAttribute(Qt::WA_TranslucentBackground); > } > > void ToolWindow::paintEvent(QPaintEvent *event) > { > QPainter p(this); > > const int h = 10; > const int w = 12; > > QPoint path[7]; > > path[0] = QPoint( 0, h); > path[1] = QPoint( w , h); > path[2] = QPoint( w * 2, 0); > path[3] = QPoint( w * 3, h); > path[4] = QPoint(width(), h); > path[5] = QPoint(width(), height()); > path[6] = QPoint( 0, height()); > > p.drawPolygon(path, 7); > } > _______________________________________________ > Interest mailing list > Interest@qt-project.org > http://lists.qt-project.org/mailman/listinfo/interest Regards, Konstantin _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
