720 lines
25 KiB
Objective-C
720 lines
25 KiB
Objective-C
/////////////////////////////////////////////////////////////////////////////
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// Name: dialog.h
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// Purpose: interface of wxDialog
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// Author: wxWidgets team
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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/**
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Modes used for wxDialog::SetLayoutAdaptationMode().
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*/
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enum wxDialogLayoutAdaptationMode
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{
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wxDIALOG_ADAPTATION_MODE_DEFAULT = 0, ///< Use global adaptation enabled status.
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wxDIALOG_ADAPTATION_MODE_ENABLED = 1, ///< Enable this dialog overriding global status.
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wxDIALOG_ADAPTATION_MODE_DISABLED = 2 ///< Disable this dialog overriding global status.
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};
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#define wxDIALOG_NO_PARENT 0x00000020 ///< Don't make owned by apps top window
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#define wxDEFAULT_DIALOG_STYLE (wxCAPTION | wxSYSTEM_MENU | wxCLOSE_BOX)
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#define wxDIALOG_ADAPTATION_NONE 0 ///< Don't do any layout adaptation
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#define wxDIALOG_ADAPTATION_STANDARD_SIZER 1 ///< Only look for wxStdDialogButtonSizer for non-scrolling part
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#define wxDIALOG_ADAPTATION_ANY_SIZER 2 ///< Also look for any suitable sizer for non-scrolling part
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#define wxDIALOG_ADAPTATION_LOOSE_BUTTONS 3 ///< Also look for 'loose' standard buttons for non-scrolling part
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/**
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@class wxDialog
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A dialog box is a window with a title bar and sometimes a system menu,
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which can be moved around the screen. It can contain controls and other
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windows and is often used to allow the user to make some choice or to
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answer a question.
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Dialogs can be made scrollable, automatically, for computers with low
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resolution screens: please see @ref overview_dialog_autoscrolling for
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further details.
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Dialogs usually contain either a single button allowing to close the
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dialog or two buttons, one accepting the changes and the other one
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discarding them (such button, if present, is automatically activated if the
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user presses the "Esc" key). By default, buttons with the standard wxID_OK
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and wxID_CANCEL identifiers behave as expected. Starting with wxWidgets 2.7
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it is also possible to use a button with a different identifier instead,
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see SetAffirmativeId() and SetEscapeId().
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Also notice that the CreateButtonSizer() should be used to create the
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buttons appropriate for the current platform and positioned correctly
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(including their order which is platform-dependent).
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@section dialog_modal Modal and Modeless
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There are two kinds of dialog, modal and modeless. A modal dialog blocks
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program flow and user input on other windows until it is dismissed, whereas
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a modeless dialog behaves more like a frame in that program flow continues,
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and input in other windows is still possible. To show a modal dialog you
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should use the ShowModal() method while to show a dialog modelessly you
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simply use Show(), just as with frames.
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Note that the modal dialog is one of the very few examples of
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wxWindow-derived objects which may be created on the stack and not on the
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heap. In other words, while most windows would be created like this:
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@code
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void AskUser()
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{
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MyAskDialog *dlg = new MyAskDialog(...);
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if ( dlg->ShowModal() == wxID_OK )
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// ...
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//else: dialog was cancelled or some another button pressed
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dlg->Destroy();
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}
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@endcode
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You can achieve the same result with dialogs by using simpler code:
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@code
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void AskUser()
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{
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MyAskDialog dlg(...);
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if ( dlg.ShowModal() == wxID_OK )
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// ...
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// no need to call Destroy() here
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}
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@endcode
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An application can define a wxCloseEvent handler for the dialog to respond
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to system close events.
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@beginStyleTable
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@style{wxCAPTION}
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Puts a caption on the dialog box.
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@style{wxDEFAULT_DIALOG_STYLE}
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Equivalent to a combination of wxCAPTION, wxCLOSE_BOX and
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wxSYSTEM_MENU (the last one is not used under Unix).
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@style{wxRESIZE_BORDER}
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Display a resizable frame around the window.
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@style{wxSYSTEM_MENU}
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Display a system menu.
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@style{wxCLOSE_BOX}
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Displays a close box on the frame.
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@style{wxMAXIMIZE_BOX}
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Displays a maximize box on the dialog.
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@style{wxMINIMIZE_BOX}
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Displays a minimize box on the dialog.
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@style{wxTHICK_FRAME}
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Display a thick frame around the window.
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@style{wxSTAY_ON_TOP}
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The dialog stays on top of all other windows.
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@style{wxNO_3D}
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This style is obsolete and doesn't do anything any more, don't use
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it in any new code.
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@style{wxDIALOG_NO_PARENT}
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By default, a dialog created with a @NULL parent window will be
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given the @ref wxApp::GetTopWindow() "application's top level window"
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as parent. Use this style to prevent this from happening and create
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an orphan dialog. This is not recommended for modal dialogs.
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@style{wxDIALOG_EX_CONTEXTHELP}
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Under Windows, puts a query button on the caption. When pressed,
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Windows will go into a context-sensitive help mode and wxWidgets
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will send a @c wxEVT_HELP event if the user clicked on an application
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window. Note that this is an extended style and must be set by
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calling SetExtraStyle() before Create is called (two-step
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construction).
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@style{wxDIALOG_EX_METAL}
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On OS X, frames with this style will be shown with a metallic
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look. This is an extra style.
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@endStyleTable
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Under Unix or Linux, MWM (the Motif Window Manager) or other window
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managers recognizing the MHM hints should be running for any of these
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styles to have an effect.
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@beginEventEmissionTable{wxCloseEvent}
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@event{EVT_CLOSE(func)}
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The dialog is being closed by the user or programmatically (see wxWindow::Close).
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The user may generate this event clicking the close button
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(typically the 'X' on the top-right of the title bar) if it's present
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(see the @c wxCLOSE_BOX style) or by clicking a button with the
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@c wxID_CANCEL or @c wxID_OK ids.
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@event{EVT_INIT_DIALOG(func)}
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Process a @c wxEVT_INIT_DIALOG event. See wxInitDialogEvent.
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@endEventTable
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@library{wxcore}
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@category{cmndlg}
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@see @ref overview_dialog, wxFrame, @ref overview_validator
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*/
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class wxDialog : public wxTopLevelWindow
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{
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public:
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/**
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Default constructor.
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*/
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wxDialog();
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/**
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Constructor.
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@param parent
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Can be @NULL, a frame or another dialog box.
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@param id
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An identifier for the dialog. A value of -1 is taken to mean a
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default.
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@param title
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The title of the dialog.
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@param pos
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The dialog position. The value wxDefaultPosition indicates a
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default position, chosen by either the windowing system or
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wxWidgets, depending on platform.
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@param size
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The dialog size. The value wxDefaultSize indicates a default size,
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chosen by either the windowing system or wxWidgets, depending on
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platform.
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@param style
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The window style.
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@param name
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Used to associate a name with the window, allowing the application
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user to set Motif resource values for individual dialog boxes.
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@see Create()
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*/
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wxDialog(wxWindow* parent, wxWindowID id, const wxString& title,
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const wxPoint& pos = wxDefaultPosition,
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const wxSize& size = wxDefaultSize,
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long style = wxDEFAULT_DIALOG_STYLE,
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const wxString& name = wxDialogNameStr);
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/**
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Destructor.
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Deletes any child windows before deleting the physical window.
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See @ref overview_windowdeletion for more info.
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*/
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virtual ~wxDialog();
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/**
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Adds an identifier to be regarded as a main button for the
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non-scrolling area of a dialog.
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@see @ref overview_dialog_autoscrolling (for more on layout adaptation)
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*/
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void AddMainButtonId(wxWindowID id);
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/**
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Returns @true if this dialog can and should perform layout adaptation
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using DoLayoutAdaptation(), usually if the dialog is too large to fit
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on the display.
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@see @ref overview_dialog_autoscrolling (for more on layout adaptation)
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*/
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virtual bool CanDoLayoutAdaptation();
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/**
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Centres the dialog box on the display.
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@param direction
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May be wxHORIZONTAL, wxVERTICAL or wxBOTH.
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*/
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void Centre(int direction = wxBOTH);
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/**
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Used for two-step dialog box construction.
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@see wxDialog()
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*/
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bool Create(wxWindow* parent, wxWindowID id, const wxString& title,
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const wxPoint& pos = wxDefaultPosition,
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const wxSize& size = wxDefaultSize,
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long style = wxDEFAULT_DIALOG_STYLE,
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const wxString& name = wxDialogNameStr);
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/**
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Creates a sizer with standard buttons. @a flags is a bit list of the
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following flags: wxOK, wxCANCEL, wxYES, wxNO, wxAPPLY, wxCLOSE, wxHELP,
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wxNO_DEFAULT.
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The sizer lays out the buttons in a manner appropriate to the platform.
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This function uses CreateStdDialogButtonSizer() internally for most
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platforms but doesn't create the sizer at all for the platforms with
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hardware buttons (such as smartphones) for which it sets up the
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hardware buttons appropriately and returns @NULL, so don't forget to
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test that the return value is valid before using it.
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*/
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wxSizer* CreateButtonSizer(long flags);
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/**
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Creates a sizer with standard buttons using CreateButtonSizer()
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separated from the rest of the dialog contents by a horizontal
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wxStaticLine.
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@note Just like CreateButtonSizer(), this function may return @NULL if
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no buttons were created.
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This is a combination of CreateButtonSizer() and
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CreateSeparatedSizer().
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*/
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wxSizer* CreateSeparatedButtonSizer(long flags);
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/**
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Returns the sizer containing the given one with a separating
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wxStaticLine if necessarily.
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This function is useful for creating the sizer containing footer-like
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contents in dialog boxes. It will add a separating static line only if
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it conforms to the current platform convention (currently it is not
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added under Mac where the use of static lines for grouping is
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discouraged and is added elsewhere).
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@since 2.9.2
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@param sizer The sizer to wrap, must be non-@NULL.
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@return The sizer wrapping the input one or possibly the input sizer
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itself if no wrapping is necessary.
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*/
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wxSizer *CreateSeparatedSizer(wxSizer *sizer);
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/**
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Creates a wxStdDialogButtonSizer with standard buttons. @a flags is a
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bit list of the following flags: wxOK, wxCANCEL, wxYES, wxNO, wxAPPLY,
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wxCLOSE, wxHELP, wxNO_DEFAULT.
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The sizer lays out the buttons in a manner appropriate to the platform.
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*/
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wxStdDialogButtonSizer* CreateStdDialogButtonSizer(long flags);
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/**
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Splits text up at newlines and places the lines into wxStaticText
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objects in a vertical wxBoxSizer.
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*/
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wxSizer *CreateTextSizer( const wxString& message );
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/**
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Performs layout adaptation, usually if the dialog is too large to fit
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on the display.
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@see @ref overview_dialog_autoscrolling (for more on layout adaptation)
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*/
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virtual bool DoLayoutAdaptation();
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/**
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A static function enabling or disabling layout adaptation for all
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dialogs.
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@see @ref overview_dialog_autoscrolling (for more on layout adaptation)
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*/
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static void EnableLayoutAdaptation(bool enable);
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/**
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Ends a modal dialog, passing a value to be returned from the
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ShowModal() invocation.
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@param retCode
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The value that should be returned by ShowModal.
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@see ShowModal(), GetReturnCode(), SetReturnCode()
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*/
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virtual void EndModal(int retCode);
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/**
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Gets the identifier of the button which works like standard OK button
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in this dialog.
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@see SetAffirmativeId()
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*/
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int GetAffirmativeId() const;
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/**
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Override this to return a window containing the main content of the
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dialog. This is particularly useful when the dialog implements pages,
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such as wxPropertySheetDialog, and allows the
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@ref overview_dialog "layout adaptation code" to know that only the
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pages need to be made scrollable.
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*/
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virtual wxWindow* GetContentWindow() const;
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/**
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Gets the identifier of the button to map presses of @c ESC button to.
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@see SetEscapeId()
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*/
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int GetEscapeId() const;
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/**
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Returns @true if the dialog has been adapted, usually by making it
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scrollable to work with a small display.
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@see @ref overview_dialog_autoscrolling (for more on layout adaptation)
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*/
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bool GetLayoutAdaptationDone() const;
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/**
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Gets a value representing the aggressiveness of search for buttons and
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sizers to be in the non-scrolling part of a layout-adapted dialog. Zero
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switches off adaptation, and 3 allows search for standard buttons
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anywhere in the dialog.
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@see @ref overview_dialog_autoscrolling (for more on layout adaptation)
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*/
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int GetLayoutAdaptationLevel() const;
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/**
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Gets the adaptation mode, overriding the global adaptation flag.
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@see @ref overview_dialog_autoscrolling (for more on layout adaptation)
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*/
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wxDialogLayoutAdaptationMode GetLayoutAdaptationMode() const;
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/**
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A static function getting the current layout adapter object.
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@see @ref overview_dialog_autoscrolling (for more on layout adaptation)
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*/
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static wxDialogLayoutAdapter* GetLayoutAdapter();
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/**
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Returns an array of identifiers to be regarded as the main buttons for
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the non-scrolling area of a dialog.
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@see @ref overview_dialog_autoscrolling (for more on layout adaptation)
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*/
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wxArrayInt& GetMainButtonIds();
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/**
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Gets the return code for this window.
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@remarks A return code is normally associated with a modal dialog,
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where ShowModal() returns a code to the application.
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@see SetReturnCode(), ShowModal(), EndModal()
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*/
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int GetReturnCode() const;
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/**
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On PocketPC, a dialog is automatically provided with an empty toolbar.
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This function allows you to access the toolbar and add tools to it.
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Removing tools and adding arbitrary controls are not currently
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supported.
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This function is not available on any other platform.
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@onlyfor{wxmsw}
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*/
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wxToolBar* GetToolBar() const;
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/**
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Iconizes or restores the dialog. Windows only.
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@param iconize
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If @true, iconizes the dialog box; if @false, shows and restores it.
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@remarks Note that in Windows, iconization has no effect since dialog
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boxes cannot be iconized. However, applications may need to
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explicitly restore dialog boxes under Motif which have
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user-iconizable frames, and under Windows calling
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Iconize(@false) will bring the window to the front, as does
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Show(@true).
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*/
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virtual void Iconize(bool iconize = true);
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/**
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Returns @true if the dialog box is iconized. Windows only.
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@remarks Always returns @false under Windows since dialogs cannot be
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iconized.
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*/
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virtual bool IsIconized() const;
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/**
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A static function returning @true if layout adaptation is enabled for
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all dialogs.
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@see @ref overview_dialog_autoscrolling (for more on layout adaptation)
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*/
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static bool IsLayoutAdaptationEnabled();
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/**
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Returns @true if @a id is in the array of identifiers to be regarded as
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the main buttons for the non-scrolling area of a dialog.
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@onlyfor{wxmsw}
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@see @ref overview_dialog_autoscrolling (for more on layout adaptation)
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*/
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bool IsMainButtonId(wxWindowID id) const;
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/**
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Returns @true if the dialog box is modal, @false otherwise.
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*/
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virtual bool IsModal() const;
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/**
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Sets the identifier to be used as OK button. When the button with this
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identifier is pressed, the dialog calls wxWindow::Validate() and
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wxWindow::TransferDataFromWindow() and, if they both return @true,
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closes the dialog with the affirmative id return code.
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Also, when the user presses a hardware OK button on the devices having
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one or the special OK button in the PocketPC title bar, an event with
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this id is generated.
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By default, the affirmative id is wxID_OK.
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@see GetAffirmativeId(), SetEscapeId()
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*/
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void SetAffirmativeId(int id);
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/**
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Sets the identifier of the button which should work like the standard
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"Cancel" button in this dialog. When the button with this id is
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clicked, the dialog is closed. Also, when the user presses @c ESC key
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in the dialog or closes the dialog using the close button in the title
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bar, this is mapped to the click of the button with the specified id.
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By default, the escape id is the special value wxID_ANY meaning that
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wxID_CANCEL button is used if it's present in the dialog and otherwise
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the button with GetAffirmativeId() is used. Another special value for
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@a id is wxID_NONE meaning that @c ESC presses should be ignored. If
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any other value is given, it is interpreted as the id of the button to
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map the escape key to.
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@note This method should be used for custom modal dialog implemented in
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wxWidgets itself, native dialogs such as wxMessageDialog or
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wxFileDialog, handle @c ESC presses in their own way which cannot be
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customized.
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*/
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void SetEscapeId(int id);
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/**
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Sets the icon for this dialog.
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@param icon
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The icon to associate with this dialog.
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@see wxIcon
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*/
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void SetIcon(const wxIcon& icon);
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/**
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Sets the icons for this dialog.
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@param icons
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The icons to associate with this dialog.
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@see wxIconBundle
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*/
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void SetIcons(const wxIconBundle& icons);
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/**
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Marks the dialog as having been adapted, usually by making it
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scrollable to work with a small display.
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@see @ref overview_dialog_autoscrolling (for more on layout adaptation)
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*/
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void SetLayoutAdaptationDone(bool done);
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/**
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Sets the aggressiveness of search for buttons and sizers to be in the
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non-scrolling part of a layout-adapted dialog. Zero switches off
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adaptation, and 3 allows search for standard buttons anywhere in the
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dialog.
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@see @ref overview_dialog_autoscrolling (for more on layout adaptation)
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*/
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void SetLayoutAdaptationLevel(int level);
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/**
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Sets the adaptation mode, overriding the global adaptation flag.
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@see wxDialogLayoutAdaptationMode, @ref overview_dialog_autoscrolling
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(for more on layout adaptation)
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*/
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void SetLayoutAdaptationMode(wxDialogLayoutAdaptationMode mode);
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/**
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A static function for setting the current layout adapter object,
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returning the old adapter. If you call this, you should delete the old
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adapter object.
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@see wxDialogLayoutAdapter, @ref overview_dialog_autoscrolling
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*/
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static wxDialogLayoutAdapter* SetLayoutAdapter(wxDialogLayoutAdapter* adapter);
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/**
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Sets the return code for this window.
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A return code is normally associated with a modal dialog, where
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ShowModal() returns a code to the application. The function EndModal()
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calls SetReturnCode().
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@param retCode
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The integer return code, usually a control identifier.
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@see GetReturnCode(), ShowModal(), EndModal()
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*/
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void SetReturnCode(int retCode);
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/**
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Hides or shows the dialog. The preferred way of dismissing a modal
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dialog is to use EndModal().
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@param show
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If @true, the dialog box is shown and brought to the front,
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otherwise the box is hidden. If @false and the dialog is modal,
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control is returned to the calling program.
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*/
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virtual bool Show(bool show = 1);
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/**
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Shows an application-modal dialog.
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Program flow does not return until the dialog has been dismissed with
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EndModal().
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Notice that it is possible to call ShowModal() for a dialog which had
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been previously shown with Show(), this allows to make an existing
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modeless dialog modal. However ShowModal() can't be called twice
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without intervening EndModal() calls.
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Note that this function creates a temporary event loop which takes
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precedence over the application's main event loop (see wxEventLoopBase)
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and which is destroyed when the dialog is dismissed.
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This also results in a call to wxApp::ProcessPendingEvents().
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@return The value set with SetReturnCode().
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@see ShowWindowModal(), ShowWindowModalThenDo(),
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EndModal(), GetReturnCode(), SetReturnCode()
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*/
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virtual int ShowModal();
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/**
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Shows a dialog modal to the parent top level window only.
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Unlike ShowModal(), dialogs shown with this function only prevent the
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user from interacting with their parent frame only but not with the
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rest of the application. They also don't block the program execution
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but instead return immediately, as Show(), and generate a
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wxEVT_WINDOW_MODAL_DIALOG_CLOSED event (wxWindowModalDialogEvent)
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later when the dialog is closed.
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Currently this function is only fully implemented in wxOSX ports, under
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the other platforms it behaves like ShowModal() (but also sends the
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above mentioned event).
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@see wxWindowModalDialogEvent, ShowWindowModalThenDo()
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@since 2.9.0
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*/
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void ShowWindowModal();
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/**
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Shows a dialog modal to the parent top level window only and call a
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functor after the dialog is closed.
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Same as the other ShowWindowModal() overload, but calls the functor
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passed as the argument upon completion, instead of generating the
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wxEVT_WINDOW_MODAL_DIALOG_CLOSED event.
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This form is particularly useful in combination with C++11 lambdas,
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when it allows writing window-modal very similarly to how ShowModal()
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is used (with the notable exception of not being able to create
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the dialog on stack):
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@code
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wxWindowPtr<wxDialog> dlg(new wxMessageDialog(this, "Hello!"));
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dlg->ShowWindowModalThenDo([this,dlg](int retcode){
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if ( retcode == wxID_OK )
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DoSomething();
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// dlg is implicitly destroyed here, because the pointer was
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// explicitly captured by the lambda
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});
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@endcode
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@param onEndModal Function object to call when the dialog is
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closed. The functor is called with a single
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integer argument, dialog's return code.
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@note The dialog instance must not be destroyed until @a onEndModal
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|
is called. The best way to ensure that is to use wxWindowPtr
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|
to hold a pointer and include it in the lambda's capture,
|
|
by value (not reference!), as shown in the example above.
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|
|
@since 3.0
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|
|
@see wxWindowPtr<T>
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|
*/
|
|
template<typename Functor>
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|
void ShowWindowModalThenDo(const Functor& onEndModal);
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|
};
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|
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|
/**
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|
@class wxDialogLayoutAdapter
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|
|
|
This abstract class is the base for classes that help wxWidgets perform
|
|
run-time layout adaptation of dialogs. Principally, this is to cater for
|
|
small displays by making part of the dialog scroll, but the application
|
|
developer may find other uses for layout adaption.
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|
|
|
By default, there is one instance of wxStandardDialogLayoutAdapter which
|
|
can perform adaptation for most custom dialogs and dialogs with book
|
|
controls such as wxPropertySheetDialog.
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|
|
@library{wxcore}
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|
@category{winlayout}
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|
|
|
@see @ref overview_dialog_autoscrolling
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|
*/
|
|
class wxDialogLayoutAdapter
|
|
{
|
|
public:
|
|
/**
|
|
Default constructor.
|
|
*/
|
|
wxDialogLayoutAdapter();
|
|
|
|
/**
|
|
Override this to returns @true if adaptation can and should be done.
|
|
*/
|
|
virtual bool CanDoLayoutAdaptation(wxDialog* dialog) = 0;
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|
|
|
/**
|
|
Override this to perform layout adaptation, such as making parts of the
|
|
dialog scroll and resizing the dialog to fit the display. Normally this
|
|
function will be called just before the dialog is shown.
|
|
*/
|
|
virtual bool DoLayoutAdaptation(wxDialog* dialog) = 0;
|
|
};
|
|
|
|
|
|
/**
|
|
Event sent by wxDialog::ShowWindowModal() when the dialog closes.
|
|
|
|
@since 2.9.0
|
|
*/
|
|
class wxWindowModalDialogEvent : public wxCommandEvent
|
|
{
|
|
public:
|
|
/// Constructor
|
|
wxWindowModalDialogEvent (wxEventType commandType = wxEVT_NULL, int id = 0);
|
|
|
|
/// Return the corresponding dialog.
|
|
wxDialog *GetDialog() const;
|
|
|
|
/// Return the dialog's return code.
|
|
int GetReturnCode() const;
|
|
|
|
/// Clone the event.
|
|
virtual wxEvent *Clone() const;
|
|
};
|