Is there an easy way to ensure that controls in different groupboxes on a Qt dialog line up correctly using layouts? If not, is there a way to line them up using code in the dialog's constructor?
For example, here is a form with two groupboxes containing controls that are laid out using a grid:
alt text http://lh3.ggpht.com/_4pUyapZ-mEE/S4w93l4Ab5I/AAAAAAAACQE/mJraY0z1jyI/groupbox1.png
Here is how I want it to look:
alt text http://lh5.ggpht.com/_4pUyapZ-mEE/S4w93rKiEBI/AAAAAAAACQI/nlt7mul79p8/groupbox2.png
Note that these dialogs will end up translated into different languages so what might be the longest label in English won't necessarily be the same label in German.
I don't think there is an easy solution since you have to separated and not connected layouts. What you could do is after you set up the layouts is iterating over all label strings and measure their size with QWidget::fontMetrics() on their label widget, remeber the maximum value and call QWidget::setMinimumWidth(). That you can also do after translating strings (if you do it dynamically at run-time).
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.
Using Borland/CodeGear/Ebarcadero C++ Builder 2009. Is it possible to show shortcuts (or other text), right aligned in a second column in a TPopupMenu ?
For instance:
[image] Open File ctrl-O
[image] Close File ctrl-W
[image] BlahBlah ctrl-B
etc.
If so, how ?
I checked the break property on an item, but the results is not exactly what I want, since items are selectable on their own, instead of the complete line. Also it's not drawn that nicely.
Your feedback appreciated.
A menu item can have an image (see the TMenuItem.ImageIndex property), and can have a shortcut assigned (see the TMenuItem.ShortCut property). The VCL will automatically draw those elements for you, exactly as you have shown.
By default, they are a little squished together. You can use the TMenuItem.OnMeasureItem event to extend the Width:
If you still do not like the way the default drawing looks, or you want different text than the ShortCut to appear on the right side, you will have to owner-draw the menu items yourself (see the TMenuItem.OnDrawItem and TMenuItem.OnAdvancedDrawItem events), then you can make the menu items appear however you want.
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.
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 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.