I need a QTabWidget with icons only:
How can I hide the label text of a tab in Qt? I cannot set the text to an empty string (""), as I am using docked widgets ( QDockWidget ) and the label text is set automatically (and I need it if the widget is floating).
But in tabbed mode I just want to display the icons (of the tabs).
Possible approaches:
Font size to 0?
I need to create my own bar class and override the paint event as here
Anything easier / cleaner?
--- Edit ---
Ok, the "set window title to empty string, and reset it the original text" approach works. I am using the topLevelChanged signal for this. However, it has some drawbacks, as the empty text still occupies some space. Another issue, with the text the tooltip is gone, and I cannot set it back.
What I am currently trying is something in-between the "text empty" and Prasad Silva's approach. I try to identify the text label inside the tab and set its size to 0, then reset it. It's slightly different, but would keep the text intact.
Btw, I see a line on top of my tabs, any idea what this is (where it comes from)?
Edit: There seems to be no "easy way" (style sheet, attribute) for this, see Hiding bottom line in QTabBar
Maybe I will create the whole tab bar on my own, as the automatically generated stuff is just too hard to handle (agree with PS on this).
This can not be done easily. Use empty text.
The way I solved something like was to create a QDockWidget subclass that installed a QWidget subclass as the titlebar (via setTitleBarWidget). This gave me control over showing/hiding the text in the titlebar when the dock widget fires topLevelChanged, dockLocationChanged and visiblityChanged.
This is really a big hack to get around the fact that Qt has refused to expose a public API for the docking system. We have since moved on to a custom docking implementation due to these limitations.
If you do not want to see the text, you can set it to an empty text after saving the current text, and when you want to see it again, restore it from the stored variable.
I do not think there is anything in the API for this not so common case, which means you will need to do it yourself.
Now, you could claim that it is tedious to do for many widgets, but on the other hand, you could write a simple hash define or inline function to do this repetitive work for you, which would only result a one-liner call, basically, which you would need to use anyway when changing the state.
Related
My problem is quite simple: I need to transfer form elements from one tab to another.
Say I've ten tabs and each tab has it's own set of text edits.
Is it possible to create just one set of text edits and transfer it from one tab to another,changing functionality behind it, but without changing the forms layout?
Currently I've "solved" that problem just by populating copy of text edit's for each tab but common sense tells me that there's a simpler way to achieve that in Qt.
I'm using Qt 5.7.
Yes, it's possible using a single QTabBar. A QTabBar, as its name suggests, only displays a narrow bar with multiple tabs within.
You can put a frame below that tab bar and listen for tab change signal which is emitted by the QTabBar. In this way, the frame below is the same for all tabs, so you can change underlying logic for each tab.
I'm creating a control that can be used for manual inspection of Tesseract-OCR's output.
Currently I've implemented it as a custom widget, where I do all the drawing (I use a QScrollArea to handle the scrolling at least), and it looks like this:
As you can see, the images are "flowing", like word-wrapped lines in a text editor, and I use the space below the header text, so I don't have 2 clearly separated columns.
Now, it was suggested to me that using a custom widget is 'reinventing the wheel', but the problem is, I don't see a clear way to customize one of the existing container widgets enough to look and behave like this, that would involve significantly less effort or code. Neither is it clear at all to me what is the best way to do it. At most, I can think of using a QListWidget with owner-drawn items and variable item heights.
Am I wrong to use a custom widget here?
I have a problem with displaying a text to area with different attributes.
My project has a multi-threading build. I reach to GUI text area by using signal-slot mechanism. I put my texts to the text area like this;
addrMW->ui->printerArea->appendPlainText(command.Data);
I want to append my text to this area with different font, size, etc..
I'm using Qt Creator 2.7.2 / Qt 5.1. Could someone explain this to me with an example?
What you want is a rich text edit. Luckily QTextEdit is able to handle that. Check the acceptRichText property (which should be true by default).
Then the methods you're looking for are:
setCurrentCharFormat
setCurrentFont
setFontFamily
setFontPointSize
etc...
Then, instead of appendPlainText() you should use append() to add text to the QTextEdit. Also see this Q/A. As proposed in the accepted answer, you can also use html formatted text instead.
I have a map application and a submenu which has dynamically added objects (i.e. points on a map) added to the submenu, depending on the layer that is loaded. I have the ability to hide each individual objects (i.e. a point) by clicking on the corresponding submenu item. Is there any way to organize the submenu? When there are a lot of points (i.e. 100) the entire submenu takes up the screen. Can I add a scrollbar to a submenu? I looked in the documentation, but couldn't find anything that support this feature.
From this bug report I was able to find out that you could do the following:
submenu->setStyleSheet("QMenu { menu-scrollable: 1; }");
Works like a charm.
There is no such possibility as far as I know.
Maybe you shouldn't use a sub menu for this but prefer a menu entry that show a Point manager GUI of your own which would have a QListWidget displaying all your points items.
I'm aware that this solution will break a (big?) part of your code but I don't see anything else.
I think you may be able to get the effect you want by creating and using your own QStyle subclass (via QApplication::setStyle()), and overriding the styleHint virtual method to return 1 when the StyleHint parameter passed in is SH_Menu_Scrollable. At least, that works for me when I create large QMenu objects and show them as popup menus.... It may also work for QMenus attached to the menu bar, but I havent tried that.
Whilst it is possible by subclassing the QMenu class to create a custom widget and going from there you're better off looking at a better way to display that information. You'll save yourself time and it'll be much easier for your users to not have to scroll through a big list of items in a small area.
I have a QListWidget containing items which have icons and when the items are selected the icon is just highlighted out. Is there a way to prevent this? I can't use stylesheets because it's for an embedded application and including them takes up too much space.
thanks
I suppose when you say "Highlithed out", you mean that the icon colors don't render well when the line is selected, and therefore, you can't see properly the icon...
Maybe you could consider using a different icon when the item is selected. It's possible to do so by specifing a mode to your icon.
Example :
QIcon MyIcon(":/images/foo");
MyIcon.addFile(":/images/bar", QSize(...), QIcon::Selected);
You can easily make a try in QtDesigner and see the results...
Hope it helps a bit !
Certainly, drawing on a black-and-white screen presents its challenges.
It sounds like you just want to change the appearance of the interface, not any functionality. If this is the case, a QItemDelegate-derived class (or QStyledItemDelegate) is almost certainly what you want. In particular, the drawDecoration function looks like it is used to draw an icon, and the style options should include whether it is selected. The simplest fix would be to override that function, set the selected flag in the options to false, then pass it up to the parent's function.