QGraphicsView and Scrolling

[validator]

Hi. I add line with 5000 pixel into QGraphicsView then I scroll horizontallly but I can not come end of that line . I write my own scrollBar. Code is below

What is my problem . Do you know?

#include "mainwindow.h"
 
 
 
#include <QtGui>
 
MainWindow::MainWindow(QWidget *parent)
    : QWidget(parent)
{
 
	currentPosition = 0;
	populateScene();
 
	scene->addLine(QLineF(-100,0,5000,0),QPen(Qt::green));
	view1 = new QGraphicsView(scene);
 
 
 
     scrollbar = new QScrollBar(Qt::Horizontal, this);
 
 
 
 
	/*view1->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);*/
 
 
 
 
    QVBoxLayout *vertical = new QVBoxLayout(this);
    QWidget *subWidget = new QWidget(this);
    QHBoxLayout *layout = new QHBoxLayout(subWidget);
    layout->addWidget(view1);
 
    vertical->addWidget(subWidget);
    vertical->addWidget(scrollbar);
 
     connect(scrollbar, SIGNAL(sliderMoved(int)), this, SLOT(moveViews(int)));
 
 
}
 
void MainWindow::populateScene()
{
	scene = new QGraphicsScene;
}
 
void MainWindow:: moveViews(int value)
{
	int moveBy = value - currentPosition;
	view1->scroll(-moveBy, 0);
	view2->scroll(-moveBy, 0);
 
	currentPosition = value;                        
}

#include "mainwindow.h"



#include <QtGui>

MainWindow::MainWindow(QWidget *parent)
    : QWidget(parent)
{
    
	currentPosition = 0;
	populateScene();

	scene->addLine(QLineF(-100,0,5000,0),QPen(Qt::green));
	view1 = new QGraphicsView(scene);
 


     scrollbar = new QScrollBar(Qt::Horizontal, this);
	
	
	

	/*view1->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);*/
	


	
    QVBoxLayout *vertical = new QVBoxLayout(this);
    QWidget *subWidget = new QWidget(this);
    QHBoxLayout *layout = new QHBoxLayout(subWidget);
    layout->addWidget(view1);

    vertical->addWidget(subWidget);
    vertical->addWidget(scrollbar);
 
     connect(scrollbar, SIGNAL(sliderMoved(int)), this, SLOT(moveViews(int)));

   
}

void MainWindow::populateScene()
{
	scene = new QGraphicsScene;
}

void MainWindow:: moveViews(int value)
{
	int moveBy = value - currentPosition;
	view1->scroll(-moveBy, 0);
	view2->scroll(-moveBy, 0);
	
	currentPosition = value;                        
}

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[jpn]

Why don't you use the built-in scrollbar of QGraphicsView? The default range of QScrollBar is 0-99. Most likely it doesn't match too well with your view.

[validator]

I want to use two GraphicsView , when I set scrollbarvalue , I want to move both of them.
How can I do it.

[validator]

answer ???

[GUIDeveloper]

Connect one scrollbar's valueChanged(or similar) signal to another scroll bar's setValue(or similar) slot.

j

[d_stranz]

I am sure that after 9 years of waiting, the OP is absolutely delighted to see this reply.