drawfont.cpp

几个qt-linux的练习小程序

#include "drawfont.h"

DrawWidget::DrawWidget()
{
    draw = new Drawwidget(this);
    draw->ReSize(750, 550);
    draw->SetBackGroundColor(green);
//    update();
    resize(800, 600);
}
/*绘制字体*/

void DrawWidget::drawFonts( QPainter *p )
{
    static const char *fonts[] = { "Helvetica", "Courier", "Times", 0 };
    static int sizes[] = { 10, 12, 18, 24, 36, 0 };
    int f = 0;
    int y = 0;
    while ( fonts[f] ) {
        int s = 0;
        while ( sizes[s] ) {
            QFont font( fonts[f], sizes[s] );
            p->setFont( font );
            QFontMetrics fm = p->fontMetrics();
            y += fm.ascent();
            p->drawText( 10, y, "This is Draw Fonts funtions!" );
            y += fm.descent();
            s++;
        }
        f++;
    }
}
void DrawWidget::drawIt( QPainter *p )
{
    drawFonts(p);
}

void DrawWidget::paintEvent( QPaintEvent *)
{
    QPainter paint( draw );
    drawIt( &paint );
}

int main( int argc, char **argv )
{
    QApplication app( argc, argv );
    DrawWidget   draw;
    app.setMainWidget( &draw );
    draw.setCaption("Qt");
    draw.show();
    return app.exec();
}