I have a QTableView set to multi selection mode, selection of entire rows. Works fine, only I get some kind of cell cursor I want to get rid off (row 71).
The following screenshot illustrates what I mean:
The rows I select with the mouse are highlighted in blue (see 69). But when I move around with the cursor keys the cells are somehow highlighted (see 71, 1st column - bit hard to see but visible). Any idea what is causing that?
Qt 5.6.1, widgets style is FUSION, Win10
Related
I got a multiple selection CListBox with horizontal scroll bar enabled and showed correctly. Problem is, that when I use function
lst.ResetContent() and fill it back, I can't find way to scroll text in the rows back to the same position. I tried to use
lst.SetScrollPos(SB_HORZ, horizScroll, TRUE); , where horizScroll = lst.GetScrollPos(SB_HORZ); This works correctly on scroll bar itself, but
text in the row stays not scrolled (manual scrolling functions OK).
Structure of my program is:
CListBox lst;
int horizScroll;
/*Periodically doing code bellow*/
//Get current scroll position
horizScroll = lst.GetScrollPos(SB_HORZ);
//Reset current content
lst.ResetContent();
//Add item into CListBox (UNICODE in my application)
lst.AddString(L"Some longer text then width of CListBox");
//Calculate horizontal extent and set it through
lst.SetHorizontalExtent(calculatedWidth);
//Try to scroll text (scrolls only scroll bar, not text itself)
lst.SetScrollPos(SB_HORZ, horizScroll, TRUE);
UpdateData(FALSE);
Thanks in advance!
EDIT:
As "rrirower" answered correctly,
lst.PostMessage(WM_HSCROLL, MAKEWPARAM(SB_THUMBPOSITION, 250), 0);
message does the job. Scroll position from horizScroll works perfectly. I suggest posting this message twice, because if you do it only once, text is re-scrolled visually from beginning to the wanted position. When you post it twice, text visually stays at the correct position and scroll bar just quickly comes to the right place.
If I understand you correctly, you're trying to scroll the text in the list box horizontally using the program code. If you use Spy++, you'll see that when you manually scroll, using the mouse, a series of WM_HSCROLL messages is posted to the list box control. You can accomplish the same thing by doing this...
lst.PostMessage(WM_HSCROLL, MAKEWPARAM(SB_THUMBPOSITION, 250), 0);
You need to calculate the position (I used 250 above), but, the above code should move the text and the scroll bar horizontally.
After some reading it seems that Invalidate should do the trick. Since as I understand you have one text line this should be fine, however if the painting itself is complex and requires resources you can use ScrollWindowEx and then InvalidateRect on the rectangle returned by the latter to repaint only the changed area.
I would like the horizontal scroll bar to appear whenever there is text eliding. Such that the user won't have to resize the whole GUI. How would I do this?
This is what I have coded:
ui->tableWidget->horizontalHeader()->setStretchLastSection(true);
ui->tableWidget->horizontalHeader()->setSectionResizeMode(1,QHeaderView::Stretch);
ui->tableWidget->resizeColumnsToContents();
I also tried enabling scrollbar to appear always, but scrolling to the very right doesn't do anything.
If I set textElideMode to ElideNone , the text from the 2nd column is partially hidden and no scrollbar appears.
QHeaderView::Stretch will stretch the column width to the available space. Use QHeaderView::ResizeToContents to make the column wide enough to display the content, resulting in a horizontal scroll bar if necessary.
This will have a couple of side effects of which I'm not sure you want them.
There will probably be no more ellipsis in the elided text.
If all of the values in your Hash column are very small, then that column will be very thin, so there might be 'empty' space next to that column.
I'd like to change the default style of the list-view control's tooltips to balloon.
I first called ListView_GetToolTips() to get the HWND of the list-view's tooltips control, and then used GetWindowLongPtr()/SetWindowLongPtr() to add the TTS_BALLOON style.
I handle LVN_GETINFOTIP to customize the tooltip for the items (first column) in the list-view: the tooltip texts that appear for the first column items are actually a copy of the text of the third column. The other columns (subitems) are managed automatically by the list-view.
The balloon-style tooltips for the first column items seem OK; their stems are correctly positioned:
But the tooltips for the second column seem drawn wrongly, e.g. the balloon is drawn as if it was referred to a subitem in a row below the actual row pointed by the mouse cursor.
In the following picture, the "star" indicates the position in which the mouse cursor was when the tooltip appeared, but the tooltip's stem points to a row below, marked with an ellipse:
The strange thing is that the tooltips for the third column seem drawn correctly.
Is this a bug in the list-view control? (I'm using Windows 7.)
Or what am I missing here?
The ListView uses a tracking tooltip and positions it to unfold and reveal the hidden text in a column that's too small. It's not expecting its tooltip to be a balloon and so doesn't compensate for that.
You'd need to sub-class the tooltip itself, watch for TTM_TRACKPOSITION messages from the ListView, and adjust the coordinates.
Your second question - the shaded background comes from the system theme. You should be able to get it by calling SetWindowTheme on the tooltip (I'm not sure why the ListView disables themes for the tip).
I would like to enable mouse-selection of the text of several QLabels arranged in a grid layout in a Qt GUI.
A QLabel has textInteractionFlags like TextSelectableByMouse which enables this behaviour for one object, but a selection across several QLabel widgets does not seem to work.
Is there a way around this that does not require a lot of mouse "tracking" or reimplementing a layout?
I fear there's no simple method to get what you want. The first problem would be what you'd expect to find in the paste buffer after selecting some rectangular section of your table. How should the label texts be delimited, should they be organized by row or colum?
You may say that you want them row-wise, columns separated by blanks and rows ending with a \n, but that doesn't need to be what the next person needs.
You may want to spend some time considering QTableView or QTableWidget.
I've got a multi-band ultragrid with an ultragridrowedittemplate per band.
In Design view the ultragrid is showing several horizontal lines - which can each be dragged downwards to show a view of the ultragrid bands. After much searching I discovered they are row scroll regions and I've added in some code into the form initialisation procedure to remove these row scroll regions.
That was fine at first, but the ultragrid, over time has added more and more row scroll regions to itself - and when the application is now loaded it takes more and more time for the code to run to remove all these regions.
Is there a setting in the Design mode that stops these row scroll regions being added? I haven't noticed a pattern to when they are added. If someone could explain/help this will be much appreciated!
Thank you
In design mode drag the divider to the top of the grid to remove them. To create them there should be a handle just above the scroll bar that you can grab and drag down. If you want to prevent them from being created at design time or run time, set DisplayLayout.MaxRowScrollRegions to 1.
Note that you may also want to set DisplayLayout.MaxColScrollRegions to 1 as well if you don't want either row or col scroll regions. To remove ColScrollRegions, drag the divider to the left of the grid to remove them. There is a handle to the left of the scroll bar if you want to add them back.