I want to change color of the row with NULL items (I didn't do setData() or setItem()) in QTableWidget. How to do this?
To have full control over the items, I would just drop in an item, and then set the background color:
Fill the row with QTableWidgetItem's and then you can change the background color.
QTableWidgetItem *newItem = new QTableWidgetItem("");
tableWidget->setItem(row, column, newItem);
QColor color( Qt::red );
tableWidget->item( row, column )->setBackgroundColor( color );
That is the main way that I have formatted any cells in the past.
QStyleSheets
In the documentation for QStyleSheets, QTableView and QTableWidget share the same kind of properties:
http://qt-project.org/doc/qt-4.8/stylesheet-examples.html#customizing-qtableview
http://qt-project.org/doc/qt-4.8/stylesheet-reference.html#alternate-background-color-prop
http://qt-project.org/doc/qt-4.8/stylesheet-reference.html#item-sub
It should work with the table and rows, even if it isn't full of items.
Hope that helps!
Related
I have QTreeWidget with two columns. The first column is the text, and the second is QPushButton. I can not specify the size of buttons and the size of the second column. When you try to set the size of the column of content, the second column disappears. How to change the width of the second column?
tree_widget_->setColumnCount(2);
tree_widget_->header()->resizeSection(1, 10);
tree_widget_->header()->setStretchLastSection(false);
tree_widget_->header()->setResizeMode(0,QHeaderView::Stretch);
tree_widget_->topLevelItem(4)->addChild( wiop = new QTreeWidgetItem(QStringList() << QString( "Расстояние: %1 км" ).arg( range ) ) );
tree_widget_->setItemWidget(tree_widget_->topLevelItem(4)->child(0),1,range_plot_button_ = new QPushButton("График",tree_widget_));
range_plot_button_->resize(10,10);
tree_widget_->setColumnWidth(1, 10) should do what you wanted.
When you assign QPushButton to QTreeWidget as a top level item the QTreeWidget object usualy assigned as a parent of this button, so all geometry of that button is handled by it's parent.
Take a look at docs.
If you want your push button to have it's own geometry with layouts (within column) you can make blank widget, set it to TreeWidget as an item and make your push button to be a child of that blank widget with all conveniences of layouts in Qt.
I try setColumnWidth, but it is not work.
Later I try tree_widget_->header()->setResizeMode(1,QHeaderView::ResizeToContents);
and it is work!
I want to add text (at the beginning of a row) and an image at the end of the row.
I can set the text but how to set an image at the end of the row item in QTreeWidgetItem?
Just set for example two columns in QTreeWidget and then set text in first one and icon in second one:
QTreeWidgetItem *newItem = new QTreeWidgetItem;
newItem->setText(0, "Something");
newItem->setIcon(1, QIcon("Path to your icon"));
myTreeWidget->addTopLeveItem(newItem);
Or instread of setting icon you can just set foreground:
newItem->setForeground(QBrush(QPixmap("Path to your image")));
which may be better for your problem.
I have a advanced datagrid label function like this:
private function dgFormat(item:Object, column:AdvancedDataGridColumn):String{
var v3:int = item.value1 - item.value2;
return "Total: " + v3;
}
How can I change the text color of v3 dynamically? I want it to be red if it's less than zero & black otherwise.
thanks!
There's a few ways of doing this, but personally if I were you, I'd just create a custom item renderer for the columns that you want the color to change and do something like:
<s:Label text="Total: {data}" color="{data < 0?0xFF0000:0x000000}" />
This way, you bind the difference right off the bat without having to add 'total' in your data, and bind the color change as well.
You'll need a custom item renderer for your AdvancedDataGridColumn. The item renderer will check the value being set, and update the color of the text depending on its content.
This should get you started.
I have a GridView with image buttons for selecting rows. I am using an OnRowDataBound event to color selected rows Blue:
e.Row.ForeColor = System.Drawing.Color.Blue
Now that works great as long as I don't set a color either in the CSS stylesheet or on the grid Items themselves. If I do that, then all rows are colored that color and I don't get my Blue selected rows color for selected rows. I would like to color the text in the grid something other than black. Any ideas how to get around this?
One way is just to have ASP.NET write the style to each cell in the row so that it overrides any CSS at the row level. Try...
foreach(TableCell cell in e.Row.Cells)
{
cell.ForeColor = System.Drawing.Color.Blue;
}
I'm using a QTableWidget to display several rows. Some of these rows should reflect an error and their text color is changed :
Rows reflecting that there is no error are displayed with a default color (black text on white background on my computer).
Rows reflecting that there is an error are displayed with a red text color (which is red text on white background on my computer).
This is all fine as long as there is no selection. As soon as a row is selected, no matter of the unselected text color, the text color becomes always white (on my computer) over a blue background.
This is something I would like to change to get the following :
When a row is selected, if the row is reflecting there is no error, I would like it to be displayed with white text on blue background (default behavior).
If the row is reflecting an error and is selected, I would like it to be displayed with red text on blue background.
So far I have only been able to change the selection color for the whole QTableWidget, which is not what I want !
Answering myself, here is what I ended up doing : a delegate.
This delegate will check the foreground color role of the item. If this foreground color is not the default WindowText color of the palette, that means a specific color is set and this specific color is used for the highlighted text color.
I'm not sure if this is very robust, but at least it is working fine on Windows.
class MyItemDelegate: public QItemDelegate
{
public:
MyItemDelegate(QObject* pParent = 0) : QItemDelegate(pParent)
{
}
void paint(QPainter* pPainter, const QStyleOptionViewItem& rOption, const QModelIndex& rIndex) const
{
QStyleOptionViewItem ViewOption(rOption);
QColor ItemForegroundColor = rIndex.data(Qt::ForegroundRole).value<QColor>();
if (ItemForegroundColor.isValid())
{
if (ItemForegroundColor != rOption.palette.color(QPalette::WindowText))
{
ViewOption.palette.setColor(QPalette::HighlightedText, ItemForegroundColor);
}
}
QItemDelegate::paint(pPainter, ViewOption, rIndex);
}
};
Here is how to use it :
QTableWidget* pTable = new QTableWidget(...);
pTable->setItemDelegate(new MyItemDelegate(this));
What you'll want to do is connect the selectionChanged() signal emitted by the QTableWidget's QItemSelectionModel to a slot, say OnTableSelectionChanged(). In your slot, you could then use QStyleSheets to set the selection colours as follows:
if (noError)
{
pTable->setStyleSheet("QTableView {selection-background-color: #000000; selection-color: #FFFFFF;}");
}
else
{
pTable->setStyleSheet("QTableView {selection-background-color: #FF0000; selection-color: #0000FF;}");
}
It looks ok, but you might want to look at the documentation of QStyleOption it can tell you wether the item drawn is selected or not, you don't have to look at the draw color to do that. I would probably give the model class a user role that returns whether the data is valid or not and then make the color decision based on that. I.e. rIndex.data(ValidRole) would return wether the data at this index is valid or not.
I don't know if you tried overriding data for the BackgroundRole and returning a custom color, Qt might do the right thing if you change the color there
You could, of course, inherit from the table widget and override the paint event, but I don't think that is what you want to do.
Instead, should use the QAbstractItemDelegate functionality. You could either create one to always be used for error rows, and set the error rows to use that delegate, or make a general one that knows how to draw both types of rows. The second method is what I would recommend. Then, your delegate draws the rows appropriately, even for the selected row.
You could use e.g. a proxy model for this where you return a different color if you have an error for the specific modelindex;
QVariant MySortFilterProxyModel::data(const QModelIndex & index, int role = Qt::DisplayRole) {
// assuming error state and modelindex row match
if (role==Qt::BackgroundRole)
return Qt::red;
}