In Qt package, is it possible to achieve highlighting (as seen when hovering with the mouse) of an item in QTreeView
programmatically?
在Qt包中,是否可以通过编程方式实现QTreeView中项目的突出显示(如用鼠标悬停时所见)?
I am able to select the item and it gives a similar impression, but I cannot use this method (since I am using selections in some other place).
我能够选择项目,它给出了类似的印象,但我不能使用这种方法(因为我在其他地方使用选择)。
The last option would be to store a flag in the item itself and return a background or a font from data() method for some role. But this approach seems very tedious.
最后一个选项是在项目本身中存储一个标志,并从某个角色的data()方法返回背景或字体。但这种做法似乎非常繁琐。
1 个解决方案
#1
0
I ended up following vahancho advice.
我最后听了vahancho的建议。
In my model I have added the following in the data(QModelIndex index)
method:
在我的模型中,我在数据(QModelIndex索引)方法中添加了以下内容:
if (role == Qt::BackgroundColorRole)
{
if (HasHighlighted && (index == LastHighlightedIndex))
{
return qVariantFromValue(QColor(229, 243, 255)); //highlighting color, at least on Windows10
}
}
To highlight I call
突出我打电话
void TreeModel::SetHighlighted(QModelIndex & index)
{
if (index != LastHighlightedIndex || !HasHighlighted)
{
if (HasHighlighted)
{
emit dataChanged(LastHighlightedIndex, LastHighlightedIndex); //clearing previous highlighted
}
LastHighlightedIndex = index;
HasHighlighted = true;
emit dataChanged(index, index);
}
}
In my case I use a proxy so I need to get the right index: with the GetModelIndex
method
在我的情况下,我使用代理,所以我需要获得正确的索引:使用GetModelIndex方法
void CustomTreeView::SimulateHover(QModelIndex index)
{
TreeProxyModel *proxy = dynamic_cast<TreeProxyModel*>(this->model());
if (proxy != nullptr)
{
proxy->model()->SetHighlighted(proxy->GetModelIndex(index));
}
}
-
QModelIndex TreeProxyModel::GetModelIndex(QModelIndex & index)
{
return mapToSource(index);
}
In addition to clear last hover:
除了明确的最后悬停:
void CustomTreeView::ClearSimulatedHover()
{
TreeProxyModel *proxy = dynamic_cast<TreeProxyModel*>(this->model());
if (proxy != nullptr)
{
proxy->model()->ClearHighlighted();
}
}
#1
0
I ended up following vahancho advice.
我最后听了vahancho的建议。
In my model I have added the following in the data(QModelIndex index)
method:
在我的模型中,我在数据(QModelIndex索引)方法中添加了以下内容:
if (role == Qt::BackgroundColorRole)
{
if (HasHighlighted && (index == LastHighlightedIndex))
{
return qVariantFromValue(QColor(229, 243, 255)); //highlighting color, at least on Windows10
}
}
To highlight I call
突出我打电话
void TreeModel::SetHighlighted(QModelIndex & index)
{
if (index != LastHighlightedIndex || !HasHighlighted)
{
if (HasHighlighted)
{
emit dataChanged(LastHighlightedIndex, LastHighlightedIndex); //clearing previous highlighted
}
LastHighlightedIndex = index;
HasHighlighted = true;
emit dataChanged(index, index);
}
}
In my case I use a proxy so I need to get the right index: with the GetModelIndex
method
在我的情况下,我使用代理,所以我需要获得正确的索引:使用GetModelIndex方法
void CustomTreeView::SimulateHover(QModelIndex index)
{
TreeProxyModel *proxy = dynamic_cast<TreeProxyModel*>(this->model());
if (proxy != nullptr)
{
proxy->model()->SetHighlighted(proxy->GetModelIndex(index));
}
}
-
QModelIndex TreeProxyModel::GetModelIndex(QModelIndex & index)
{
return mapToSource(index);
}
In addition to clear last hover:
除了明确的最后悬停:
void CustomTreeView::ClearSimulatedHover()
{
TreeProxyModel *proxy = dynamic_cast<TreeProxyModel*>(this->model());
if (proxy != nullptr)
{
proxy->model()->ClearHighlighted();
}
}