There is a window appear after you click that triangle icon of ComboBox. This I know it's not just a panel like object because for example in the following picture it' out of main form.
What is its type and how can I create something like this?
It is a standard ListBox control that the ComboBox creates internally (its HWND is accessible via the CB_GETCOMBOBOXINFO message). It is implemented as a free-floating window (so it can appear outside the ComboBox's parent window), except when the Style property is set to csSimple, in which case the ListBox resides as a child within the ComboBox's client area instead.
Related
I have a TStringGrid, that has a TPopupMenu connected.
By clicking one event of the popup menu, I would like to get the calling component. Is that possible?
Background:
It is a bigger project, every form has a "BasicForm" I can inherited from. So I would like to provide a "default popup menu" for grids that have stuff like Copy, Select, and so on in it. In the inherited form I only match the grid (if exists) with that popup and I'm done.
Seems you are looking for the PopupComponent property of TPopupMenu:
Vcl.Menus.TPopupMenu.PopupComponent
Indicates the component that last displayed the popup menu in response
to a right mouse click.
Read PopupComponent to determine which control is currently using the
popup menu. In applications where multiple controls share the same
pop-up menu, use PopupComponent to determine which of them displayed
the menu.
Set PopupComponent to associate a control with the menu before calling
the Popup method programmatically to bring up the pop-up menu.
When I add, for example, a TPanel to a form and align it using alTop and then add a TMainMenu to the same form, the main menu position overrides the panel position such that the Main Menu remains topmost on the form with the panel appearing below it.
Is it possible to override the TMainMenu position so I can add a component like a Panel above it and the Main Menu below it?
Alternatives like TActionManager and/or TToolBar are not suitable because of BiDi compatibility issues.
No, the main menu is a Windows component and its location is fixed. This isn't a Delphi limitation but a restriction on how menus work with windows in Windows.
From MSDN (emphasis mine) :
Only an overlapped or pop-up window can contain a menu bar; a child window cannot contain one. If the window has a title bar, the system positions the menu bar just below it. A menu bar is always visible.
If you want menu-like behaviour in a component which you can freely place anywhere on your form, you would need to either write one yourself or look for third-party alternatives.
Trying to get a new style on a ComboBox in FireMonkey (XE2).
But for some odd reason I cannot get the text of a ListBoxItem to show.
What I've tried is the following.
Create a new FireMonkey HD Application.
On the form I've added a ComboBox.
Right click on the ComboBox and select 'Edit custom style'
There I've added the following components
while the original one consist out of the following components
Now it seems to me that I need the TContent object (but I can't seem to find it in the toolpallete)
How can i bind my Text object to the strings that are placed in my ComboBox?
Any pointers are very welcome.
FireMonkey doesn't use a TText object to display the text. Instead it creates a copy of the list box item within the TContent (if I remember correctly).
As you've worked out you need to add a TContent to your form. The easy way to do this is to
go back to the form,
right click and select View as Text
Find the TStyleBook object and add a TContent at the appropriate point (the format for this should be obvious from the rest of the file).
No need to add any properties - defaults will be used the first time.
Right click, View as Form.
Go back into the style editor and edit away.
I have a TComboBox with several Strings in its Items list. When run on Windows, this works properly - I am able to click the combo-box, have the items appear, and then select one of the items.
When I set the OS target to OS X, however, the TComboBox does not allow me to select an item. I can click the TComboBox and have the items appear, but when I try to click an item from the drop-down list I receive a 'bump' sound on the Mac, and nothing is selected.
How can I get TComboBoxes to work properly on the Mac using Firemonkey?
I am using C++ Builder XE6 with FMX (Firemonkey).
Workaround:
Basic idea: use Show () instead of ShowModal (), combined with a component that will make the main form non-clickable while the child form is shown.
On the main form, add a TRectangle (or TPanel) with Visibility = false, Opacity = 0.25 (or something like that - could also be 0), and HitTest = true.
Then, when about to show a child form, call a function that sets the TRectangle on the main form to cover the main form (setting its Position->X, Position->Y, Width, Height) and then sets its Visibility = true.
Then, call a child form with Show () instead of ShowModal ().
When the child form is done, call a function on the main form that sets the TRectangle back to Visibility = false.
I want to create a context menu for Delphi components like TDBGrid, TTreeView or similar. How can I do that?
Place a TPopupMenu onto your form and design your menu with it. Then select the component the popupmenu is meant for (DbGrid, TreeView, ...) and set it's PopupMenu property to the PopupMenu you just designed.
You can have different PopupMenus for different components.
After placing a TPopupmenu control and linking it to the desired control, if you want to change the available items in the popup menu according to the selected cell or node in a treeview use the OnContextPopup event of the control, that gives you a chance to alter the default behaivor of the Popupmenu