Given a QTreeView I would like to provide the user a means of inserting new items. For this I created a QMenuBar that contains several categorizing sub menus that in turn contain the different kinds of items the user can insert.
My first implementation was to select some existing item in the tree and then pick a menu item which is then inserted as a child of the selected item in the tree. There were buttons for rearranging the items, such as 'move up', 'move down' and so on. Later I replaced these buttons by a drag&drop interface where the user can simply drag items in the QTreeView around to rearrange them, which seems quite intuitive to me.
Now inserting new items into the tree by clicking menu items still feels annoying. In my opinion a more natural approach would be to drag the items out of the menu and into the desired location of the tree.
So is there a sensible way to implement this behaviour? My problem is how to start a drag operation by clicking a menu item as the triggered() signal is just emitted when the user releases the mouse button. But with the mouse button released, there is no drag anymore...
Related
I tried to implement a modular drag and drop system for this window, which has a lot of QListWidgets in other tabs.
Currenty, the user is only able to copy the items from the right QListWidget (at the button "Tools"). But now I want to implement a simple option to copy all selected QListWidgetItems from any QListWidget.
My plan
Drag the selected items out of the QListWidget
A section with a button named "copy" appears
The user drop the dragged QListWidgetItems on the copy button
The copy button disappears
The result is a QList<QListWidgetItem*> with the dropped QListWidgetItems
The problems
(-)
I'd need a signal when the drag starts / is called
(-)
I'd need a signal when the drop starts / is called
How to get QList<QListWidgetItem*> (or QListWidget::selectedItems)?
I want a modular opportunity (for example with a pointer to the QListWidget) because I don't want to copy some code. For example, I have 12 QListWidgets and for each 3 actions. If I want to change a litte thing, I need to do that 36 times.
Is it possible without subclassing?
I couldn't think of a coherent search term for my problem so please forgive me if this has been asked before.
I have 24 combo boxes sitting on a panel control, displayed in 4 rows of 6.
After the user defines the value for each combo and hits the "go" button, I add all combo boxes to list so I can use the values in another section of my program.
The problem is that the order the comboboxes are added to the list is messed up, compared to their visual layout on the panel, and I would like to define the order. Currently, it adds the 9th combobox to the list first then the 20th, 2nd, 16th etc etc.
I tried TabIndex but that didnt work.
Before I manually rename and relabel all of the boxes, any other suggestions will be gratefully received.
The controls of your form exist in Controls collection of the container controls, for example when you add a Panel and a Button to a Form and two ComboBox to the Panel, then:
Form.Controls contains button1 and panel1
Panel.Controls contains comboBox1 and comboBox2
Controls are added to the Controls collection, with the same order that you add them to designer. Open designer.cs, look at the end of InitializeComponent to see the order.
You can also see/change the order using Document Outline window.
That said, now it should be obvious that panel1.Controls.OfType<ComboBox>() returns combo boxes with the same order that you see in Document Outline (or based on their z-index, and it doesn't have anything to do with their x/y placements).
You may want to order them based on TabIndex, or any other property that you like:
panel1.Controls.OfType<ComboBox>().OrderBy(x=>x.TabIndex)
Note
In general, if you are going to use those values for a search, instead of relying on the order of values, a much better idea is creating a SearchModel class which has a few properties, the set those properties to the selected value of the corresponding combo box (manually or using databinding) then pass the search model to the other classes.
This is probably really easy to do and I'm probably missing the wood for the trees but I'm trying to display a menu on a selection of pages which contains the sub menu items from the equivalent main menu item.
For example, the main menu has 'Products' (parent item) listed with 'Product 1', 'Product 2' and 'Product 3' as sub menu items (child items). Is it possible (without creating duplicate articles) to create a submenu which only shows the child items but which links to the same articles as from the main menu?
I've read about using menu-alias but none of the documentation I've found gives a clear message on this.
Thanks.
1) Go to Menus -> Menu Manager -> Add Menu.
2) Add a new menu item in it, choose for type Menu Item Alias and on the right side under Menu Item choose which Menu you want it to be the copy of (not a real copy, but an alias).
3) Repeat 2) for all menu items you want to display
4) In Module Manager, add new Menu module, choose your newly created Menu, assign it to some position and publish.
#Marko D's solution works well and can be customised to suit many variations.
There's another option in this case where you don't event need to create another menu or menu aliases.
1) In module manager, add a new menu module, name it, position it, apply it to the relevant pages, then under Basic Options choose the main menu in question and a start level of 2 and publish
2) No number 2 ;)
It's always good to have more than 1 option!
I am designing a widget which has a grid of buttons. When clicked I want these buttons to present the user with 3 choices (ideally in a small drop down menu) that they can select from. When they select 1 of the 3 choices, I want that button to be selected (i.e., remain depressed). I want the QAction that is associated with each of the 3 choices to be able to know which button was clicked so that I can log which button in the grid was clicked. Each button in the grid needs to be exclusive, and when selected. The 3 choices presented are the same for all buttons.
I first started with a QButtonGroup and QPushButtons in a QGridLayout. I was able to get the buttons to be exclusive as I wanted. When I changed the buttons from QPushButton to QToolButton, and added a drop down menu, two things happened:
When they select an item from the menu, the button doesn't stay depressed like I want it to.
I can't seem to see a way for the menu action to be informed about which button was selected, so I am unable to log which button is selected.
Any thoughts on how I can achieve the functionality I am looking for?
EDIT:
A few clarifying points:
Each button in the m x n grid represents a person.
The drop down list on each button lets you select what action that person is currently doing.
Only one person can be doing something at a time. Hence, only one button in the entire grid can be depressed at a time.
The items in the button drop down menu should become checked when they are selected, and these items need to be exclusive, so if a button is clicked twice, the a new checked menu item in the drop down menu should uncheck the previous one.
When an item in the button drop down menu is selected, the menu should go away and the button should appear depressed.
I need to log the button (i.e., the row and column) that was clicked as well as the choice selected from the button drop down menu. So somehow menu item signal/slot needs to know about which button was clicked. However, QToolButton::setMenu() doesn't transfer ownership of the Menu to the QToolButton, so I'm not sure how to make the signals/slots in the QActions of the QMenu aware of which button was selected.
QObject::sender will tell you what QObject emitted the signal
I have a QDialog that contains a bunch of fields, buttons and a custom widget that inherits QTableWidget somewhere in the middle. I have the tab order set up the way I want it and it works fine, but only the first time though. After focusing on the last widget in the tab order and pressing tab again the focus goes back to the custom QTableWidget! It doesn't go back to number 1 in the tab order!
I have tried changing the tab order to something else and I still get the same result. After tabbing out of the last widget the focus goes to the table (which is #26 out of 38 in the tab order) instead of the first field.
I have tried setting "NoFocus" on the main QDialog and the custom table widget itself. I am also not using setTabOrder() anywhere on the QDialog or on my table widget.
What could be going on?