How to create dialog or menu like attached picture after right click event?

[Newbie]

As shown in picture, is there any suggestion of how to detect right click event then create select able menu with API functions?

[Joel Buehler]

this one seems to be helpful:

https://community.graphisoft.com/t5/Developer-forum/How-to-add-custom-Context-menu-to-treview-in-the...

😃 

[Miklos Vegh]

You can detect right mouse click by implementing/overriding the

virtual void ListBoxContextMenuRequested (const ListBoxContextMenuEvent& ev, bool* processed);

virtual function of the ListboxObserver.

And you can create a custom context menu like this:

void OpenContextMenu (const DG::NativePoint& pos)
{
	const ULong CmdId1 = 1001;
	const ULong CmdId2 = 1002;
	const ULong CmdId3 = 1003;

	DG::Command cmd1 (CmdId1, 0, 0);
	DG::Command cmd2 (CmdId2, 0, 0);
	DG::Command cmd3 (CmdId3, 0, 0);
	DG::CommandDescriptor cmddesc1(cmd1, GS::UniString ("Command 1"));
	DG::CommandDescriptor cmddesc2(cmd2, GS::UniString ("Command 2"));
	DG::CommandDescriptor cmddesc3(cmd3, GS::UniString ("Command 3"));

	GS::UniString menuNameStr ("ContextMenu");
	DG::Menu* menu = new DG::Menu (menuNameStr);
	if (menu == nullptr)
		return;

	menu->AddMenuItem (DG::MenuSimpleItem (CmdId1));
	menu->AddMenuItem (DG::MenuSimpleItem (CmdId2));
	menu->AddMenuItem (DG::MenuSimpleItem (CmdId3));
	DG::ContextMenu* contextMenu = new DG::ContextMenu (menuNameStr, menuNameStr, menu);
	if (contextMenu == nullptr) {
		delete menu;
		return;
	}

	DG::CommandTable enabledCommands;
	enabledCommands.Put (CmdId1, &cmddesc1);
	enabledCommands.Put (CmdId2, &cmddesc2);
	enabledCommands.Put (CmdId3, &cmddesc3);
	contextMenu->SetEnabledCommands (enabledCommands);

	Int32 commandId = 0;
	DG::CommandEvent* commandEvent = contextMenu->Display (pos);
	if (commandEvent != nullptr)
		commandId = commandEvent->GetCommand ().GetCommandId ();

	delete commandEvent;
	delete contextMenu;
	delete menu;

	switch (commandId) {
		case CmdId1:
		case CmdId2:
		case CmdId3:
			break;

		default:
			break;
	}
}

Or you can also create a popup-like dialog with a listbox or any other controls inside. The popup like dialog is closed on a mouseclick outside of the dialog area. You can set the popup-like style with the DG::Dialog::SetPopupStyle() member function. Popup dialogs must not have caption and sizeable flag. See the following example:

'GDLG'   SAMPLE_POPUP_DLG_ID  Modal | noFrame | noCaption | noGrow  0    0  100  100  "" {
/* [  1] */ LeftText			    5    5  90   23	SmallPlain  vCenter  "Text"
}

'DLGH'   SAMPLE_POPUP_DLG_ID  DLG_SAMPLE_POPUP {
1	""	LeftText_0
}

class SamplePopupDialog: public DG::ModalDialog,
						 public DG::PanelObserver
{
	enum {
		LeftTextId	= 1
	};

	DG::LeftText text;
	const DG::NativeRect& openButtonScreenRect;

public:
	SamplePopupDialog(const DG::NativeRect& openButtonScreenRect_);
	~SamplePopupDialog();

	virtual void	PanelOpened (const DG::PanelOpenEvent& ev) override;
};


SamplePopupDialog::SamplePopupDialog (const DG::NativeRect& dialogOpeningButtonScreenRect_, ...):
	DG::ModalDialog	(resModule, SAMPLE_POPUP_DLG_ID, resModule),
	text (GetReference (), LeftTextId),
	dialogOpeningButtonScreenRect (dialogOpeningButtonScreenRect_)
{
	SetPopupStyle ();
	Attach (*this);
}


SamplePopupDialog::~SamplePopupDialog ()
{
	Detach (*this);
}


void	SamplePopupDialog::PanelOpened (const DG::PanelOpenEvent& /*ev*/)
{
	DG::Utils::PlaceDialogNextToNativeRect (*this, dialogOpeningButtonScreenRect, DG::Utils::RightCenter);
}