I have a QDialog that contains several dock widgets and one QGraphicsView. The widget layout is set to grid, the QGraphicsView size policy is set to fixed on the 2 axes and it the QGraphicsView is center in the empty zone of the QDialog.
I would like to resize my QGraphicsView and let it at the center of the empty zone of the QDialog.
I have tried this code:
// resize QGraphicsView
ui->mProjectView->resize(mProject->getSize() + QSize(2,2));
But QGraphicsView is adjusting its size to QDialog when resizing QDialog.
I'va tried then this:
// resize QGraphicsView
ui->mProjectView->resize(mProject->getSize() + QSize(2,2));
// Adjust size of QDialog to fit new widget's size
ui->centralWidget->adjustSize();
But this does not work. QGraphics View keeps last size...
I'm sure the way to achieve it is simple but I'm missing something. Can you help please?
You could try
ui->mProjectView->setFixedSize(mProject->getSize() + QSize(2,2));
instead.
Related
I have a QMainWindow with a center widget and a number of dockable widgets. The size of the various widgets get manipulated by the sliders between the dockables. I would like to fix the center widget's height to it's minimumSize height and not allow it to be made larger by the user. The width should remain relative to the QMainWindow (I only allow top and bottom dockables, so the center widget is stretched to the width of the main window).
The center widget is a QDockWidget, containing a QWidget with a QVBoxLayout (containing more stuff).
I have tried deriving from the QVBoxLayout and overriding maximumSize, but it wasn't respected. Overriding expandingDirections also didn't make any difference.
Any advise on how to achieve this?
Got it, thanks to Johannes Schaub.
I thought the QDockWidget propagates the constraints to its contained widget, which it does not. Setting maximumHeight on the inner Widget does the trick.
I have a QWidget that I want to include within a scroll-area so that when the designated QWidget size is exceeded vertically, the user can scroll up and down to see more.
QWidget renameWidget;
QScrollArea scrollarea.
How do I go about doing this? I set the widget inside the scroll-area on the UI editor but it didn't work.
Any ideas?
Thanks.
Think of QScrollArea as another layout. Add the scroll area to your main widget and put everything else inside it with setWidget().
QScrollArea is QWidget, so you can even use it as a top level widget:
QScrollArea *scrollArea = new QScrollArea();
scrollArea->resize(250, 250);
QWidget *widget = new QWidget(scrollArea);
widget->setBackgroundRole(QPalette::Dark);
widget->resize(200, 200);
scrollArea->setWidget(widget);
scrollArea->show();
QScrollArea provides a scrolling view onto another widget. It is used to display the contents of a child widget within a frame. If the widget exceeds the size of the frame, the view can provide scroll bars so that the entire area of the child widget can be viewed.
An example:
QScrollArea *scrollArea = new QScrollArea(this);
scrollArea->setBackgroundRole(QPalette::Dark);
scrollArea->setWidget(renameWidget);
I have a QMainWindow whose central widget has been set to a QGraphicsView viewing a black scene (for test purposes). Note that in the code below, I use my class derived from QGraphicsView, called CQtGlView, which reimplements only the resizeEvent function.
Regardless of whether I add the view directly,
CQtMainWindow::CQtMainWindow() {
m_glView = new CQtGlView();
setCentralWidget(m_glView);
}
or stick it in a layout with margins of 0 in a dummy widget,
CQtMainWindow::CQtMainWindow() {
m_glView = new CQtGlView();
QWidget* dummy = new QWidget();
QHBoxLayout* l = new QHBoxLayout();
l->setContentsMargins(0,0,0,0);
l->addWidget(m_glView);
dummy->setLayout(l);
setCentralWidget(dummy);
}
I get an unwanted grey border around the widget.
The screenshot below illustrates the problem, visible between my scene and the windows aero border.
This would not be a problem if my application did not allow switching to full screen. The border is very obvious once the rest of the screen is black.
It's possible this area represents the DockWidgetAreas around the outside of the central widget.
Is there anything I can do to solve this other than not use QMainWindow? (Undesirable due to my use of menuBar, tool bars, and statusBar.)
It turns out that QGraphicsView derives from QFrame, where I assumed it was only a QWidget.
The solution to this problem was to call setFrameStyle(QFrame::NoFrame); in the constructor of my QGraphicsView subclass. Or if it was not a subclass,
m_glView->setFrameStyle(QFrame::NoFrame);
Have you tried setFrameShape(QFrame::NoFrame) on the QGraphicsView?
I'm trying to write a map editor in Qt, using QGraphicsView and QGraphicsScene for both the map and tile sheets.
The problem I'm having right now is with making a good widget for importing tiles. For this, I'm using a QTabWidget (for different tile sheets), and TileWidget as the widget for each tab, which contains the QGraphicsScene and QGraphicsView.
It's working to a rough degree, but not all the tiles (or TileObjects, which are implementations of QGraphicsItem) are visible. I'm even calling view->ensureVisible(scene->sceneRect()), but still not all of the QGraphicsScene is not visible, even with scroll bars.
I understand this is due to limiting the maximum size of my QTabWidget, but that is necessary.
This happens mainly when I import a larger tile sheet.
I have a TileWidget as the QWidget for the QTabWidget, which has both the QGraphicsScene and the QGraphicsView.
TileWidget::TileWidget(QWidget *parent)
: QWidget(parent)
{
scene = new QGraphicsScene;
view = new TileView(scene, this);
connect(view, SIGNAL(newBrushSelected(TileObject *b)), this, SLOT(selectNewBrush(TileObject *b)));
}
TileView is simply a QGraphicsView re-implemented to handle mouse release events.
To add tiles, I simply call scene->addItem().
I have no other code for TileView. When I use
void TileWidget::showEvent(QShowEvent *event)
{
view->fitInView(scene->itemsBoundingRect(), Qt::KeepAspectRatio);
}
I get something like this.
It's okay for smaller tile sheets, but not for larger ones. What should I add to keep the size of the tiles normal, and navigate TileView using scroll bars?
Nevermind, figured it out. Just me being stupid.
You need something like:
p_myGraphicsView->fitInView(
myGraphicsView->scene()->itemsBoundingRect(),
Qt::KeepAspectRatio);
I am new to QT and I am creating a widget that has a gridlayout. The gridlayout contains a matrix of QLineEdit widgets. The window resizes to fit the layout but when layout is large it goes off screen. When I maximize the screen, the QLineEdit widgets are resized to fit the screen and for large layouts they become extremely small.
I want to be able to resize the window without resizing the QLineEdit widgets and add scroll bars to navigate.
I tried the following with no luck:
Window->resize(QSize(500,500));
QScrollArea *scrollArea = new QScrollArea;
scrollArea->setWidget(Window);
where window is the widget containing the layout. Also, the window closes when after executing "scrollArea->setWidget(Window);" and I dont why.
If someone can help me out I would really appreciate it.
Thank You!
For disabling the vertical resize on the widgets, why don't you just use the setFixedHeight() method on the widgets?
For the menu bar, why don't you take it out of the widget that is scrollable. You can have a layout for the window that contains the menu bar and then the widget that contains everything else (scrollable part). Is that what you are looking for?
I fixed my problem by creating a QMainWindow with the menu bar. Then created a widget which includes the layout, set the Scroll Area to the widget. Finally set the central widget of the main widow to the scroll area.