Is there anyway to let QTableWidget's header items stretch to full size just like QTreeWidget does ?
From the QTableView documentation:
By default, the cells in a table do not expand to fill the available space.
You can make the cells fill the available space by stretching the last header section. Access the relevant header using horizontalHeader() or verticalHeader() and set the header's stretchLastSection property.
You should give that a try.
QTableWidget *tw = ...;
tw->horizontalHeader()->setStretchLastSection(true);
The stretchLastSection documentation has:
Note: The horizontal headers provided by QTreeView are configured with this property set to true, ensuring that the view does not waste any of the space assigned to it for its header.
So that's how the tree views do it.
Related
In particular I have a GWT project with a
TextArea element which I want to conform to a set width and expand as much as needed to the bottom.
ListBox element which I want to conform to a set width and expand vertically to show the entirety of the displayed list item.
Those are two widgets using replaced elements: <textarea> and <select> respectively.
for the TextArea, there's no way to make it really "resize automatically" other than listening to events and computing the new size (there's actually no need to compute the new size, you can just let the browser do it; see http://phaistonian.pblogs.gr/expanding-textareas-the-easy-and-clean-way.html)
for the ListBox, it's impossible to have the items' text wrap. See Word wrap options in a select list for a similar question in pure JS.
Set the width to whatever number and set height to auto.
I have several qdockwidget and within these a qtableview, as seen in the attached picture, my problem is I want the tables are the same size of the dock.
I tried to do this and it does not work:
table-> resize (dock-> size());
By default, the cells in a table do not expand to fill the available
space. You can make the cells fill the available space by stretching
the last header section. Access the relevant header using
horizontalHeader() or verticalHeader() and set the header's
stretchLastSection property.
Source: QTableView Documentation
I hope that helps you. Cheers.
Is there a way to make the layoutStretch property always be obeyed? E.g. I have it set to "1,3,2", but then a widget (a label) in the first part (the "1" in "1,3,2") expands (when more text is added), and then the 1:3:2 ration is no longer respected. That is, the "1:3:2" ratio turns into something more like "3:1:3".
You should take a look at the property QWidget::sizePolicy. It controls how the layout respects the sizeHint() of its children when it updates the geometries.
So what you need to do is: Make the layout ignore the horizontal sizeHints of the child widgets by setting the horizontal sizePolicy of the three child widgets to QSizePolicy::Ignored:
QLabel *label = ...;
...
label->setSizePolicy(QSizePolicy::Ignored, label->sizePolicy().verticalPolicy());
(The second argument will ensure that the vertical policy isn't changed by this statement.
Of course, you should set the size policy of every child widget, this example code is only for the label.)
Note that the contents of your layout have to be widgets; I think nested layouts can't be assigned a size policy (but I might be wrong). At least using QtDesigner, there is no way of applying a size policy to a layout itself (if it isn't the layout of a widget). See comments for details.
In QtDesigner, you can set the sizePolicy of the child widgets like this:
Before:
Shrinked:
Select the items in the layout:
Set the horizontal size policy to "Ignored":
Result:
I have a QTableWidget, QTextEdit, and cancel & okay buttons.
I want these widgets to stay in the same position relative to each other, and the QTableWidget to expand if the dialog window is expanded or size changed...
How can I do that?
You need to look into Qt's layout system - using layouts will handle automatically resizing your objects based on the size of their parent.
A combination of using QWidget::setSizePolicy() and QBoxLayout::setStretch() (or more likely QBoxLayout::insertWidget(..., int stretch = 0, ...)) will allow you to acheive the behaviour you refer to where only certain objects expand to fill available space, while others remain a constant size.
Addressing the image you've given above as an example:
Aside from dragging and dropping objects into the form, to achieve this solution I have:
Set the vertical sizePolicy of textEdit to Fixed.
Set a height in textEdit's minimumSize for the sizePolicy to use.
Set layoutStretch in centralWidget to 1,0, i.e. assign the minimum possible space for the elements contained in horizontalLayout and give any remaining space to tableWidget.
I want to make editable cells with multi-lines content in QTreeWidget and I use for this purpose QPlainTextEdit as a delegate. I need to set proper size to all rows that switching between editing and displaying went smooth, without any visible changes.
rect = textEdit.blockBoundingRect(textEdit.firstVisibleBlock())
With this I can find out the height I need to set for the row, but I missing the place where I can do it.
How can I set proper height to QTreeWidget's rows on initialization stage and how to handle it's changes?
You need to reimplement delegate's sizeHint(). It will automatically handle row's height and width.
And note, that QTreeWidget::uniformRowHeight property must be false in this case, though it will slow tree element rendering if it contains many rows.