I pragrammaticaly create a QTreeWidget.
Then I pragrammaticaly add some items.
Then I add two QLabel widgets to two items (QTreeWidgetItem) by
myTree->setItemWidget(item1, 0, myLabel1);
myTree->setItemWidget(item2, 0, myLabel2);
And then I try to resize the row of the item pragrammaticaly.
If I use an
item1->setSizeHint(0, QSize(myWidth, myHeight) );
the row chaged. But myLabel1 is not.
If I use an
item1->setSizeHint(0, QSize(myWidth, myHeight) );
myLabel->resize(myWidth, myHeight);
everething is ok but the row of myLabel2 mis adjusting to label by position.
Can I do something to auto-adjusting a widget (by size and position) to a cell of QTreeWidget?
P.S. After any resizing of tree (resize by width or expand/collapse node) widgets updates correctly.
In view of the fact that autofit start after resizing QTreeWidget, there is some method inside that resize widgets in cells.
So I opened QTreeWidget description (https://doc.qt.io/qt-5/qtreewidget.html) and red all of Public Functions and Public Slots. When I did not find any useful function I looked at a parent class (QTreeView). And found
myTree->resizeColumnToContent(0);
Call resizeColumnToContent after resizing any row in a QTreeWidget and widgets will be always fit to cells.
P.S. I am the OP.
you can try adding/updating a widget as an item, for example:
QWidget* wdg = new QWidget;
QPushButton* btIcon = new QPushButton();
QLabel* lb = new QLabel();
QHBoxLayout* layout = new QHBoxLayout(wdg);
layout->addWidget(btIcon);
layout->addWidget(lb);
layout->setAlignment( Qt::AlignCenter );
wdg->setLayout(layout);
myTree->setItemWidget(item1, 0, wdg);
Or just fill the tree with widgets
Related
I've created a a widget in which I've placed two buttons using a layout and placed it inside a table widget's cell. The thing is that I'm changing the size of the table and I want to shift the placement of the widget without deleting them and re-initializing them from the beginning because I already assigned them actions on click (I think that the application would crash in this situation)
Code:
btn = new QPushButton[horzHeaders.size()];
btn[j].setParent(ui->tableWidget);
btn[j].setIcon(QIcon("./save.png"));
btn[j].setVisible(true);
btn_Load = new QPushButton[horzHeaders.size()];
btn_Load[j].setParent(ui->tableWidget);
btn_Load[j].setIcon(QIcon("./upload.png"));
btn_Load[j].setVisible(true);
lay = new QHBoxLayout[horzHeaders.size()];
lay[j].addWidget(&btn[j]);
lay[j].addWidget(&btn_Load[j]);
QWidget *w = new QWidget[horzHeaders.size()];
w[j].setLayout(&lay[j]);
ui->tableWidget->setCellWidget(j,vertHeaders.size() - 1, &w[j]);
You can add and remove widgets from a layout anytime you want
QWidget *widget = new QWidget();
QPushButton *button = new QPushButton();
QHBoxLayout *Hbox = new QHBoxLayout();
QVBoxLayout *Vbox= new QVBoxLayout();
Hbox->addWidget(button);
// use it till the window is resized
//and then check with an if-statement if the window is resized or not
Hbox->removeWidget(button); // remove from the button from layout
layout()->removeAt(widget); //remove the widget's current layout
Vbox->addWidget(button); // add button widget to vertical layout
widget->setLayout(Vbox); // Give it a new layout
widget->setLayout(Vbox);
If this didn't answer your question then ask in the comments.
I have a Qt class which inherits from QMainWindow. The constructor of the class creates two widgets which are added to a horizontal layout object as follows:
MyWindow::MyWindow()
{
resize(QDesktopWidget().availableGeometry(this).size());
display = new MyWidget(this);
display->setSizePolicy(QSizePolicy::Expanding,
QSizePolicy::Expanding);
current = new MyWidget(this);
current->setSizePolicy(QSizePolicy::Expanding,
QSizePolicy::Expanding);
QHBoxLayout *layout = new QHBoxLayout();
layout->addWidget(display);
layout->addWidget(current);
QFrame* frame = new QFrame();
frame->setFrameShape(QFrame::StyledPanel);
frame->setLayout(layout);
setCentralWidget(frame);
show();
}
This currently shows the widget side of side of each other. However, what I would like to do is have one of the widgets take 30% of the horizontal space while the other one occupies the other 70%. I would also like the widgets to expand or contract if one resizes the main window but keeping these ratios.
When you place a widget into a layout you can specify its stretch factor:
QHBoxLayout *layout = new QHBoxLayout();
layout->addWidget(display, 3);
layout->addWidget(current, 7);
http://doc.qt.io/qt-5/qboxlayout.html#addWidget
I am creating a UI in Qt that has a QDockWidget containing a QPushButton and QLineEdit. Please refer to the attached mock-up. I have created the widget components and successfully got them up and running. However they are not positioned the way I want them to. Both the elements should float to the left making the extra space to the right stretch when the window is resized.
The code-
this->searchField = new QLineEdit; //"this" is a QDockWidget subclassed Object
searchField->setFixedWidth(200);
mainMenu = new Menu();
QHBoxLayout *layout= new QHBoxLayout;
QSpacerItem *filler = new QSpacerItem(1000, 10);
layout->addWidget(mainMenu->getMenuBar());
layout->addWidget(this->searchField);
layout->addSpacerItem(filler);
Any suggestion or help would be awesome!
Thanks for your time :)
http://qt-project.org/doc/qt-4.8/layout.html
http://qt-project.org/doc/qt-4.8/qboxlayout.html#addStretch
void QBoxLayout::addStretch ( int stretch = 0 )
Adds a stretchable space (a QSpacerItem) with zero minimum size and stretch factor stretch to the end of this box layout.
So this is what your new code would look like:
this->searchField = new QLineEdit;
searchField->setFixedWidth(200);
mainMenu = new Menu();
QHBoxLayout *layout= new QHBoxLayout;
layout->addWidget(mainMenu->getMenuBar());
layout->addWidget(this->searchField);
layout->addStretch(); // Added this
Hope that helps.
I want to expand QTableViews' size so each QTableView takes the half size of the window! , how can i do it?
screenshot:
http://i.stack.imgur.com/Rh87o.jpg
Add a QHBoxLayout to your widget/window and then add the tables to it.
The following code on a top level widget..
QHBoxLayout *horizontalLayout;
QTableView *tableView;
QTableView *tableView_2;
horizontalLayout = new QHBoxLayout(Widget);
tableView = new QTableView(Widget);
horizontalLayout->addWidget(tableView);
tableView_2 = new QTableView(Widget);
horizontalLayout->addWidget(tableView_2);
Will give you something like..
The two tables share the available space equally and expand and resize with the main window.
I understand how to add a scrollArea to a particular widget. However in my case Qwidget has multiple child widgets and these are all set using QVBoxLayout. Now how can I add a scroll bar in this case? Here QWidget is not the center widget, its one of the pages of the TabWidget. My code looks like:
QTabWIdget *center = new QTabWidget; setCentralWIdget(center);
xTab = new QWidget;
formLayout = new QFormLayout; formLayout->addWidget(...); formLayout->addWidget(...); formLayout->addWidget(...); formLayout->addWidget(...);
xTab->setLayout(formLayout);
Now how can I set the scrollBar to xTab? I tried using
scrollArea = new QScrollArea;
scrollArea->setWidget(xTab);
however, this isn't working.
Any idea/suggestions are helpful and appreciated.
Have you tried using QScrollArea as the tab page?
QTabWIdget *center = new QTabWidget; setCentralWIdget(center);
xTab = new QScrollArea;
formLayout = new QFormLayout; formLay....
xTab->setLayout(formLayout);
center->addTab(xTab, "XXX Tab");
I had success using the following:
scroll=new QScrollArea(mainWindow->centralWidget);
scroll->setGeometry(mainWindow->tabWidget->geometry());
scroll->setWidget(mainWindow->tabWidget);
scroll->show();
The QScrollArea defines where the scrollable widget will appear. If parent is 0, it's a non-modal window. setGeometry sets the QScrollArea instance to the desired dimensions (that of the tab). setWidget defines what widget the QScrollArea will actually be scrolling.