qgraphicsview

I have a problem , that update() function in QGraphicsItem doesn't work. What I want to do is , when I move circle , other QGraphicsItem ( in the mean time roundrect ) changes color. This is a example, what I want to do: circle.cpp: void CircleItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event) { // RoundRect Object RectItem->SetBackGround(); QGraphicsItem::mouseMoveEvent( event ); } RoundRect.cpp: void RoundRectItem::SetBackGround() { ChangeBackground = true; update(); } void RoundRectItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) { QRectF rec =

I draw few rectangles inside the QGraphicsView ; I use custom stipple pattern for these by creating a QBrush with my QPixmap . This gets displayed with the default zoom level as expected. When I call view->scale() , the rectangles show up bigger or smaller as I expected. However Qt has scaled the individual bits of the stipple pattern which is not expected; I expected it to draw the larger or smaller rectangle again with the brush. Eg. If I had used a stipple pattern with one pixel dot and pixel space, after zooming in, I want to see a larger rectangle but I want the same stipple pattern with

I'm trying to make a simple draggable item using the graphics framework. Here's the code for what I did so far: Widget class: class Widget : public QWidget { Q_OBJECT public: Widget(QWidget *parent = 0); ~Widget(); }; Widget::Widget(QWidget *parent) : QWidget(parent) { DragScene *scene = new DragScene(); DragView *view = new DragView(); QHBoxLayout *layout = new QHBoxLayout(); DragItem *item = new DragItem(); view->setAcceptDrops(true); scene->addItem(item); view->setScene(scene); layout->addWidget(view); this->setLayout(layout); } Widget::~Widget() { } DragView class: class DragView : public

I've got an application where you can watch replays for a given 2D game : Basically, a vehicle is moving on a map. The view is centered on vehicle so the map is scrolling as replay is playing, something Micro Machines -like (it's just to give an idea, the actual game is not Micro Machines ). (source: randomracket.com ) In my scene, the map is static while the vehicle is moving around. The view is scrolling for each frame of the replay, so that vehicle is centered. For performance reason, the map is tiled in several QGraphicsPixmapItem s. Viewport update mode is set to QGraphicsView:

I'm messing around with QGraphicsView and QGraphicsScene to create a Tic Tac Toe clone. I add some QGraphicsLineItem s to my scene and override the resizeEvent method of the Widget that contains the view, so that when the window is resized, the view and its contents are scaled appropriately. This works fine, except for the first time that I run the program: Once I resize the window by any amount, the scene is scaled correctly: Here's the code: main.cpp: #include <QtGui> #include "TestApp.h" int main(int argv, char **args) { QApplication app(argv, args); TestApp window; window.show(); return

How to write text in a certain cordinate in QGraphicsScene? I was trying to do like this, but with no success. Text has blck borders but inside the letters it is white, and I can't make it be black. QPainterPath path; QFont font; font.setPixelSize(50); path.addText(100, 50, font, tr("Hello World!!!")); path.setFillRule(); m_graphScen->addPath(path); Variant 1 (not a good one): QFont font; font.setPixelSize(10); font.setBold(false); font.setFamily("Calibri"); path.addText(100, 50, font, "Hello World!!"); m_graphScen->addPath(path, QPen(QBrush(Qt::black), 1), QBrush(Qt::black)); Variant 2 (fine