I am trying to use QSystemTrayIcon for my application and i am facing some problems.
It is the first time i use qt so i am not really used to it.
I followed this tutorial to make a system tray icon but i fail to customize it.
I want to have a button show/hide and not 3 show, hide, restore. These actions are really confusing for a newbie and i dont know what to do and what to connect.
I tried some things but with no luck.
Also when the system tray menu appears if you click somewhere else, the menu stays open.
Any way to solve this thing too?
If you want to remove one of the menu items, modify the createTrayIcon function so that it only adds the actions you need (and clean up the unused members once you get it to work). It's that simple.
If you want a single menu item or button to toggle between visible and hidden, you'll need to create a custom slot that calls show() or hide() (or setVisible(bool)) depending on whether the widget is hidden or not (use isVisible() for that for example). Then connect your action to that slot.
Read the Signals and Slots documentation and examples for information about how to create a new slot.
Related
Qt's QMainWindow has a ability to dock windows derived from QDockWidget. It also would put one on top on the other if few of them are stacked, producing a tab bar. Whenever a QDockWidget's state changes a signal topLevelChanged() is emmitted. At this point I would like to get access to underlying QTabWidget to set an icon for a a newly added tab. How can I do it? My patience is over trying to dig the answer out from Qt's documentation and source code. Thank you in advance.
So icon I want to be on Contents/Index tabs.
Once at least one dockwidget has been tabified, the main-window will create a QTabBar to provide the dock-tabs. Each dock-area can have its own tab-bar. These tab-bars will become children of the main-window, so you can use findChildren() or children() to get references to them.
The main difficulty will be in finding which dock-widget belongs to which tab and in which tab-bar. If the dock-widget window-titles are all unique, you can just search using the tabText(). Otherwise, you might be able to use the tabData(), which Qt sets internally to a quintptr from the dock-widget.
Once you have the correct tab, you can of course use setTabIcon() to add your icon. But note that every time a dock-widget is untabified or moved to another tab-bar, the icon will be lost.
I wrote a program in qt creator, but it includes this anonymous draggable toolbar that I would like to get rid of. It does not show up in design mode. If I right click on it, it gives me a menu with a checkbox, which I can select to get rid of it while the program is running. What is this bar? How do I get rid of it? If I knew what it was, I could just programmatically tell it to hide when the program loads.
Here are some screenshots demonstrating this weird problem. In the first screenshot, the mouse is pointed at the bar. The second one demonstrates the right-click context menu. The third one shows the program without the bar. The box can also be dragged out of the program's window entirely. I can also upload a picture of that, if necessary.
(mouse pointing at bar)
(bar has a right-click menu!)
(bar is gone)
First things first, make sure you haven't added the toolbar yourself in code (the Designer form is nothing magical, it just generates normal Qt code to ui_XXXX.h, which you should totally study, so you understand what is really happening "under the hood").
Second, perhaps that is the main menu bar, not the main tool bar.
Then, on to remove the nasty bar. On the upper right corner of Design view, you have a tree of all items in your UI. Find the QToolBar there. It is probably called mainToolBar. Right click it and remove it there. Or, if you actually have menu bar, then find QMenuBar, probably called menuBar, and remove it instead. Remember to make version control commit (or other backup) before doing this, so you can easily revert changes.
If this fails for whatever reason, and you just want to get it to work, you can always find and delete (be careful about the dangling pointers left behind, set them to nullptr if possible):
ui->setupUi(this);
// a hack: we want to get rid of the toolbar and the menubar,
// but can't remove it from the .ui, so we delete them like this.
delete findChild<QToolBar *>(); // NULL return value is ok for delete
delete findChild<QMenuBar *>(); // NULL return value is ok for delete
Doc links for findChild and alternative findChildren.
What you have there is probably the mainToolBar QToolBar object you get with every QDesigner-created QMainWindow .ui file.
If you want to get rid of it, locate it in your .ui file and just delete it.
But better think twice: you might later decide you want a QToolBar object and (at least AFAIK) there is no way to recreate it in QDesigner...
you must use this code in your constructor.
ui->mainToolBar->toggleViewAction()->setVisible(false);
mainToolBar is my toolbar name.
I am trying to develop a functionality using Qt which I don't know whether it is possible to implement. Here is the requirement:
When the user hovers over a node (an object derived from QGraphicsItem), a window will be shown near the node, in the window there might be some histograms or buttons that can be clicked to show further information. When the mouse leaves the window, it will automatically close.
I tried to use a tooltip, because it can pop-up near the node and close when the mouse leaves it, but it can only show text. So, it still cannot work that way. I am wondering if there is another way to do this? I did lots of google search, but there is still no answer.
Thanks so much for helping me with this.
If you're ok with using a 3rd party library, Qxt provides a class that provides a tooltip that is QWidget based, which will let you use an arbitrary widget as the tooltip rather than just text.
See: Qxt::ToolTip
you don't have to use tooltip for your app
you can use or call widget or dialog, on hover mouse event
Please refer Qt Example EmbeddedDialog Example, It is advanced, But you can understand how hover Enter/Leaving events are working. I personally prefer don not create instance of Popupdialog for each item, create it if only nesessary. Otherwise create one dialog and pass its reference to all the items through the constructor initialization.
1. These are the API you are intrested on, reimplemet this.
QGraphicsItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event) and void QGraphicsItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
2. When You create Dialog, You can pass Qt::WindowFlags as Qt::ToolTip.
I have created a Main Window which consists of menu bar with the first menu being "file". Now I am trying to open another window if I click on the "file" menu item. But I am not getting the receiver object of the other window while designing. How can I establish a link?
I am using Qt 4.7
I don't think you can do it by manual linking - this time you will have to write it yourself :P
Simply add a new slot to your window's class, add include for second's window header. Then in slot implementation create new window if necesary and simply call show on it.
Secondly you have to connect file meny to your signal - best is to add connect call in your window constructor AFTER intializing ui.
Also note that if your file option contains actually any submenu, then it's signal will never be emmited, so you need to think about something else in such case.
I'm using Qt with C++, and I want to make a button that keeps looking pushed down after it is pushed and released. I'm currently making buttons on a QToolBar and doing something like toolBar->addAction (icon, tr("Text"));. This makes buttons on the toolbar that display the QIcon named icon and display "Text" on hover-over. They also look pushed down as the user is pushing them, but stop looking pushed down when they are released (as is reasonable for most uses of buttons). I need something different, however: I would simply like the buttons to remain looking pushed down after they are released, perhaps until they are clicked again. It would be best if I could just call some function on a button or on the toolbar that could give me the capacity to control whether a button will look pushed down or not pushed down when it is displayed. That way I could just control this aspect of button appearance programmatically.
What's the easiest way to do this in Qt? I've seen fancy ways of doing it involving borders and very complicated setups, but I was wondering whether there might be an easy way to do it.
Add QPushButton to the toolbar using addWidget and then make the button checkable.