How to draw a line with tiled images with QPainter?

[MadBear]

Greetings,

I would like to know if it is possible to draw a line with tiled images as a background on it. I have tried to use QPen (width=20) with QBrush and Qt:TexturePattern, but this did not work correctly. Is there another way?

Thank you,
MadBear

[Santosh Reddy]

try using QPen width 0 and QBrush::TexturePattern


...but this did not work correctly. Is there another way?
What you mean by this, show the sample output, so that someone can point out the problem.

[MadBear]

Greetings,

Thank you for your reply. Ok I will try to explain what I am trying to do. I must create QGraphicsItem that is like police tape (you see it in crime scenes) that prevents civilians to cross (it is a tape that says "POLICE - STOP" in constant intervals). My idea is that user clicks control points and then I create QPainterPath with lines through those control points. Control points can also be moved around QGraphicsScene. The problem is that line betwen control points. How can I create line that looks like that police tape. I have tried with texture for QBrush, but that created something like:

PO
LI
CE
-
ST
OP

Is there perhaps a different way how I can create this?

Thank you,
MadBear

[Santosh Reddy]

Will this work




MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, Ui::MainWindow()
{
setupUi(this);

QGraphicsScene * scene = new QGraphicsScene(this);
graphicsView->setScene(scene);

QPoint point1(0, 0);
QPoint point2(1000, 0);

addBanner(scene, point1, point2, "POLICE - STOP");
}

void MainWindow::addBanner(QGraphicsScene * scene
, const QPoint & start
, const QPoint & end
, const QString & text) const
{
const int height = 25;
const int spaceing = 40;
QPen pen(Qt::black, 2, Qt::SolidLine, Qt::FlatCap, Qt::MiterJoin);
QBrush brush(Qt::yellow);
QFont font("Arial", 12);
QPoint pos(start);

QRect rect = QRect(start, QPoint(end.x(), end.y() + height));
QGraphicsRectItem * rect_item = scene->addRect(rect ,pen, brush);
rect_item->setFlag(QGraphicsItem::ItemClipsChildrenToShape);

while(pos.x() < end.x())
{
QGraphicsTextItem * item = new QGraphicsTextItem(text, rect_item, scene);
item->setFont(font);
item->setPos(pos);
item->clipPath();
pos.setX(pos.x() + spaceing + item->boundingRect().right());
}
}

[MadBear]

Greetings,
Thank you for your reply. But it does not work quite the way I wanted it. I did not notice, that this forum erased all my spaces in my example. So that was supposed to be a diagonal line (not vertical). And when I changed point2 to (1000, 30) the program didn't work anymore.
Thank you again.

Regards,
MadBear

[Santosh Reddy]

The example I post will work only for horizontal banners, you need to modify it for drawing to diagonal, using QPainterPath (you cannot use QGraphicsRectItem and QGraphicsTextItem)

I was only trying to give an example :)