# wx.Dialog¶

A dialog box is a window with a title bar and sometimes a system menu, which can be moved around the screen.

It can contain controls and other windows and is often used to allow the user to make some choice or to answer a question.

Dialogs can be made scrollable, automatically, for computers with low resolution screens: please see Automatic Scrolled Dialogs for further details.

Dialogs usually contain either a single button allowing to close the dialog or two buttons, one accepting the changes and the other one discarding them (such button, if present, is automatically activated if the user presses the “Esc” key). By default, buttons with the standard wx.ID_OK and wx.ID_CANCEL identifiers behave as expected. Starting with wxWidgets 2.7 it is also possible to use a button with a different identifier instead, see SetAffirmativeId and SetEscapeId.

Also notice that the CreateButtonSizer should be used to create the buttons appropriate for the current platform and positioned correctly (including their order which is platform-dependent).

## Modal and Modeless¶

There are two kinds of dialog, modal and modeless. A modal dialog blocks program flow and user input on other windows until it is dismissed, whereas a modeless dialog behaves more like a frame in that program flow continues, and input in other windows is still possible. To show a modal dialog you should use the ShowModal method while to show a dialog modelessly you simply use Show, just as with frames. Note that the modal dialog is one of the very few examples of Window-derived objects which may be created on the stack and not on the heap. In other words, while most windows would be created like this:

# In Python we don't have to worry about the stack vs. the heap, however
# that means that dialogs do need to be destroyed. The typical pattern for
# dialog usage looks something like this:
try:
if dlg.ShowModal() == wx.ID_OK:
# do something here
print('Hello')
else:
# handle dialog being cancelled or ended by some other button
...
finally:
# explicitly cause the dialog to destroy itself
dlg.Destroy()


You can achieve the same result with dialogs by using simpler code:

# Things can be made a little simpler in Python by using the dialog as a
# context manager, using the with statement, like this:
if dlg.ShowModal() == wx.ID_OK:
# do something here
print('Hello')
else:
# handle dialog being cancelled or ended by some other button
...

# The dialog is automatically destroyed on exit from the context manager


## Window Styles¶

An application can define a wx.CloseEvent handler for the dialog to respond to system close events. This class supports the following styles:

• wx.CAPTION: Puts a caption on the dialog box.

• wx.DEFAULT_DIALOG_STYLE: Equivalent to a combination of wx.CAPTION, wx.CLOSE_BOX and wx.SYSTEM_MENU (the last one is not used under Unix).

• wx.RESIZE_BORDER: Display a resizable frame around the window.

• wx.SYSTEM_MENU: Display a system menu.

• wx.CLOSE_BOX: Displays a close box on the frame.

• wx.MAXIMIZE_BOX: Displays a maximize box on the dialog.

• wx.MINIMIZE_BOX: Displays a minimize box on the dialog.

• THICK_FRAME: Display a thick frame around the window.

• wx.STAY_ON_TOP: The dialog stays on top of all other windows.

• NO_3D: This style is obsolete and doesn’t do anything any more, don’t use it in any new code.

• wx.DIALOG_NO_PARENT: By default, a dialog created with a None parent window will be given the application’s top level window as parent. Use this style to prevent this from happening and create an orphan dialog. This is not recommended for modal dialogs.

• wx.DIALOG_EX_CONTEXTHELP: Under Windows, puts a query button on the caption. When pressed, Windows will go into a context-sensitive help mode and wxWidgets will send a wxEVT_HELP event if the user clicked on an application window. Note that this is an extended style and must be set by calling SetExtraStyle before Create is called (two-step construction).

• wx.DIALOG_EX_METAL: On macOS, frames with this style will be shown with a metallic look. This is an extra style.

Under Unix or Linux, MWM (the Motif Window Manager) or other window managers recognizing the MHM hints should be running for any of these styles to have an effect.

## Events Emitted by this Class¶

Handlers bound for the following event types will receive one of the wx.CloseEvent parameters.

• EVT_CLOSE: The dialog is being closed by the user or programmatically (see wx.Window.Close ). The user may generate this event clicking the close button (typically the ‘X’ on the top-right of the title bar) if it’s present (see the CLOSE_BOX style).

• EVT_INIT_DIALOG: Process a wxEVT_INIT_DIALOG event. See wx.InitDialogEvent.

## Class Hierarchy¶

Inheritance diagram for class Dialog:

wxMSW

wxMAC

wxGTK

## Methods Summary¶

 __init__ Default constructor. AddMainButtonId Adds an identifier to be regarded as a main button for the non-scrolling area of a dialog. CanDoLayoutAdaptation Returns True if this dialog can and should perform layout adaptation using DoLayoutAdaptation , usually if the dialog is too large to fit on the display. Centre Centres the dialog box on the display. Create Used for two-step dialog box construction. CreateButtonSizer Creates a sizer with standard buttons. CreateSeparatedButtonSizer Creates a sizer with standard buttons using CreateButtonSizer separated from the rest of the dialog contents by a horizontal wx.StaticLine. CreateSeparatedSizer Returns the sizer containing the given one with a separating wx.StaticLine if necessarily. CreateStdDialogButtonSizer Creates a wx.StdDialogButtonSizer with standard buttons. CreateTextSizer Splits text up at newlines and places the lines into wx.StaticText objects with the specified maximum width in a vertical wx.BoxSizer. DoLayoutAdaptation Performs layout adaptation, usually if the dialog is too large to fit on the display. EnableLayoutAdaptation A static function enabling or disabling layout adaptation for all dialogs. EndModal Ends a modal dialog, passing a value to be returned from the ShowModal invocation. GetAffirmativeId Gets the identifier of the button which works like standard wx.OK button in this dialog. GetClassDefaultAttributes GetContentWindow Override this to return a window containing the main content of the dialog. GetEscapeId Gets the identifier of the button to map presses of ESC button to. GetLayoutAdaptationDone Returns True if the dialog has been adapted, usually by making it scrollable to work with a small display. GetLayoutAdaptationLevel Gets a value representing the aggressiveness of search for buttons and sizers to be in the non-scrolling part of a layout-adapted dialog. GetLayoutAdaptationMode Gets the adaptation mode, overriding the global adaptation flag. GetLayoutAdapter A static function getting the current layout adapter object. GetMainButtonIds Returns an array of identifiers to be regarded as the main buttons for the non-scrolling area of a dialog. GetReturnCode Gets the return code for this window. Iconize Iconizes or restores the dialog. IsIconized Returns True if the dialog box is iconized. IsLayoutAdaptationEnabled A static function returning True if layout adaptation is enabled for all dialogs. IsMainButtonId Returns True if id is in the array of identifiers to be regarded as the main buttons for the non-scrolling area of a dialog. IsModal Returns True if the dialog box is modal, False otherwise. SetAffirmativeId Sets the identifier to be used as wx.OK button. SetEscapeId Sets the identifier of the button which should work like the standard “Cancel” button in this dialog. SetIcon Sets the icon for this dialog. SetIcons Sets the icons for this dialog. SetLayoutAdaptationDone Marks the dialog as having been adapted, usually by making it scrollable to work with a small display. SetLayoutAdaptationLevel Sets the aggressiveness of search for buttons and sizers to be in the non-scrolling part of a layout-adapted dialog. SetLayoutAdaptationMode Sets the adaptation mode, overriding the global adaptation flag. SetLayoutAdapter A static function for setting the current layout adapter object, returning the old adapter. SetReturnCode Sets the return code for this window. Show Hides or shows the dialog. ShowModal Shows an application-modal dialog. ShowWindowModal Shows a dialog modal to the parent top level window only. __enter__ __exit__

## Class API¶

class wx.Dialog(TopLevelWindow)

Possible constructors:

Dialog()

Dialog(parent, id=ID_ANY, title="", pos=DefaultPosition,
size=DefaultSize, style=DEFAULT_DIALOG_STYLE, name=DialogNameStr)


A dialog box is a window with a title bar and sometimes a system menu, which can be moved around the screen.

### Methods¶

__init__(self, *args, **kw)

__init__ (self)

Default constructor.

__init__ (self, parent, id=ID_ANY, title=””, pos=DefaultPosition, size=DefaultSize, style=DEFAULT_DIALOG_STYLE, name=DialogNameStr)

Constructor.

Parameters
• parent (wx.Window) – Can be None, a frame or another dialog box.

• id (wx.WindowID) – An identifier for the dialog. A value of -1 is taken to mean a default.

• title (string) – The title of the dialog.

• pos (wx.Point) – The dialog position. The value DefaultPosition indicates a default position, chosen by either the windowing system or wxWidgets, depending on platform.

• size (wx.Size) – The dialog size. The value DefaultSize indicates a default size, chosen by either the windowing system or wxWidgets, depending on platform.

• style (long) – The window style.

• name (string) – Used to associate a name with the window, allowing the application user to set Motif resource values for individual dialog boxes.

AddMainButtonId(self, id)

Adds an identifier to be regarded as a main button for the non-scrolling area of a dialog.

Parameters

id (wx.WindowID) –

Automatic Scrolled Dialogs (for more on layout adaptation)

CanDoLayoutAdaptation(self)

Returns True if this dialog can and should perform layout adaptation using DoLayoutAdaptation , usually if the dialog is too large to fit on the display.

Return type

bool

Automatic Scrolled Dialogs (for more on layout adaptation)

Centre(self, direction=BOTH)

Centres the dialog box on the display.

Parameters

direction (int) – May be wx.HORIZONTAL, wx.VERTICAL or wx.BOTH.

Create(self, parent, id=ID_ANY, title="", pos=DefaultPosition, size=DefaultSize, style=DEFAULT_DIALOG_STYLE, name=DialogNameStr)

Used for two-step dialog box construction.

Parameters
• parent (wx.Window) –

• id (wx.WindowID) –

• title (string) –

• pos (wx.Point) –

• size (wx.Size) –

• style (long) –

• name (string) –

Return type

bool

wx.Dialog

CreateButtonSizer(self, flags)

Creates a sizer with standard buttons.

flags is a bit list of the following flags: wx.OK, wx.CANCEL, wx.YES, wx.NO, wx.APPLY, wx.CLOSE, wx.HELP, wx.NO_DEFAULT.

The sizer lays out the buttons in a manner appropriate to the platform.

This function uses CreateStdDialogButtonSizer internally for most platforms but doesn’t create the sizer at all for the platforms with hardware buttons (such as smartphones) for which it sets up the hardware buttons appropriately and returns None, so don’t forget to test that the return value is valid before using it.

Parameters

flags (long) –

Return type

wx.Sizer

CreateSeparatedButtonSizer(self, flags)

Creates a sizer with standard buttons using CreateButtonSizer separated from the rest of the dialog contents by a horizontal wx.StaticLine.

This is a combination of CreateButtonSizer and CreateSeparatedSizer .

Parameters

flags (long) –

Return type

wx.Sizer

Note

Just like CreateButtonSizer , this function may return None if no buttons were created.

CreateSeparatedSizer(self, sizer)

Returns the sizer containing the given one with a separating wx.StaticLine if necessarily.

This function is useful for creating the sizer containing footer-like contents in dialog boxes. It will add a separating static line only if it conforms to the current platform convention (currently it is not added under Mac where the use of static lines for grouping is discouraged and is added elsewhere).

Parameters

sizer (wx.Sizer) – The sizer to wrap, must be not None.

Return type

wx.Sizer

Returns

The sizer wrapping the input one or possibly the input sizer itself if no wrapping is necessary.

New in version 2.9.2.

CreateStdDialogButtonSizer(self, flags)

Creates a wx.StdDialogButtonSizer with standard buttons.

flags is a bit list of the following flags: wx.OK, wx.CANCEL, wx.YES, wx.NO, wx.APPLY, wx.CLOSE, wx.HELP, wx.NO_DEFAULT.

The sizer lays out the buttons in a manner appropriate to the platform.

Parameters

flags (long) –

Return type

wx.StdDialogButtonSizer

CreateTextSizer(self, message, widthMax=-1)

Splits text up at newlines and places the lines into wx.StaticText objects with the specified maximum width in a vertical wx.BoxSizer.

If widthMax has its default value of -1, only explicit new line characters in message are taken into account. Otherwise, lines are broken either after a new line or wrapped, at word boundary, if their width would become bigger than the specified maximal width.

Parameters
• message (string) – The text to be displayed.

• widthMax (int) – Specifies the text’s maximum width (this argument is available since version 3.1.1, previous versions always behaved as if the maximal width of -1 was specified).

Return type

wx.Sizer

DoLayoutAdaptation(self)

Performs layout adaptation, usually if the dialog is too large to fit on the display.

Return type

bool

Automatic Scrolled Dialogs (for more on layout adaptation)

static EnableLayoutAdaptation(enable)

A static function enabling or disabling layout adaptation for all dialogs.

Parameters

enable (bool) –

Automatic Scrolled Dialogs (for more on layout adaptation)

EndModal(self, retCode)

Ends a modal dialog, passing a value to be returned from the ShowModal invocation.

Parameters

retCode (int) – The value that should be returned by ShowModal.

GetAffirmativeId(self)

Gets the identifier of the button which works like standard wx.OK button in this dialog.

Return type

int

static GetClassDefaultAttributes(variant=WINDOW_VARIANT_NORMAL)
Parameters

variant (WindowVariant) –

Return type

wx.VisualAttributes

GetContentWindow(self)

Override this to return a window containing the main content of the dialog.

This is particularly useful when the dialog implements pages, such as wx.adv.PropertySheetDialog, and allows the layout adaptation code to know that only the pages need to be made scrollable.

Return type

wx.Window

GetEscapeId(self)

Gets the identifier of the button to map presses of ESC button to.

Return type

int

GetLayoutAdaptationDone(self)

Returns True if the dialog has been adapted, usually by making it scrollable to work with a small display.

Return type

bool

Automatic Scrolled Dialogs (for more on layout adaptation)

GetLayoutAdaptationLevel(self)

Gets a value representing the aggressiveness of search for buttons and sizers to be in the non-scrolling part of a layout-adapted dialog.

Zero switches off adaptation, and 3 allows search for standard buttons anywhere in the dialog.

Return type

int

Automatic Scrolled Dialogs (for more on layout adaptation)

GetLayoutAdaptationMode(self)

Return type

Automatic Scrolled Dialogs (for more on layout adaptation)

static GetLayoutAdapter()

A static function getting the current layout adapter object.

Return type

Automatic Scrolled Dialogs (for more on layout adaptation)

GetMainButtonIds(self)

Returns an array of identifiers to be regarded as the main buttons for the non-scrolling area of a dialog.

Return type

list of integers

Automatic Scrolled Dialogs (for more on layout adaptation)

GetReturnCode(self)

Gets the return code for this window.

Return type

int

Note

A return code is normally associated with a modal dialog, where ShowModal returns a code to the application.

Iconize(self, iconize=True)

Iconizes or restores the dialog.

Windows only.

Parameters

iconize (bool) – If True, iconizes the dialog box; if False, shows and restores it.

Note

Note that in Windows, iconization has no effect since dialog boxes cannot be iconized. However, applications may need to explicitly restore dialog boxes under Motif which have user-iconizable frames, and under Windows calling Iconize(false) will bring the window to the front, as does Show(true).

IsIconized(self)

Returns True if the dialog box is iconized.

Windows only.

Return type

bool

Note

Always returns False under Windows since dialogs cannot be iconized.

static IsLayoutAdaptationEnabled()

A static function returning True if layout adaptation is enabled for all dialogs.

Return type

bool

Automatic Scrolled Dialogs (for more on layout adaptation)

IsMainButtonId(self, id)

Returns True if id is in the array of identifiers to be regarded as the main buttons for the non-scrolling area of a dialog.

Parameters

id (wx.WindowID) –

Return type

bool

Availability

Only available for MSW.

Automatic Scrolled Dialogs (for more on layout adaptation)

IsModal(self)

Returns True if the dialog box is modal, False otherwise.

Return type

bool

SetAffirmativeId(self, id)

Sets the identifier to be used as wx.OK button.

When the button with this identifier is pressed, the dialog calls wx.Window.Validate and wx.Window.TransferDataFromWindow and, if they both return True, closes the dialog with the affirmative id return code.

Also, when the user presses a hardware wx.OK button on the devices having one or the special wx.OK button in the PocketPC title bar, an event with this id is generated.

By default, the affirmative id is wx.ID_OK.

Parameters

id (int) –

SetEscapeId(self, id)

Sets the identifier of the button which should work like the standard “Cancel” button in this dialog.

When the button with this id is clicked, the dialog is closed. Also, when the user presses ESC key in the dialog or closes the dialog using the close button in the title bar, this is mapped to the click of the button with the specified id.

By default, the escape id is the special value wx.ID_ANY meaning that wx.ID_CANCEL button is used if it’s present in the dialog and otherwise the button with GetAffirmativeId is used. Another special value for id is wx.ID_NONE meaning that ESC presses should be ignored. If any other value is given, it is interpreted as the id of the button to map the escape key to.

Parameters

id (int) –

Note

This method should be used for custom modal dialog implemented in wxWidgets itself, native dialogs such as wx.MessageDialog or wx.FileDialog, handle ESC presses in their own way which cannot be customized.

SetIcon(self, icon)

Sets the icon for this dialog.

Parameters

icon (wx.Icon) – The icon to associate with this dialog.

wx.Icon

SetIcons(self, icons)

Sets the icons for this dialog.

Parameters

icons (wx.IconBundle) – The icons to associate with this dialog.

wx.IconBundle

SetLayoutAdaptationDone(self, done)

Marks the dialog as having been adapted, usually by making it scrollable to work with a small display.

Parameters

done (bool) –

Automatic Scrolled Dialogs (for more on layout adaptation)

SetLayoutAdaptationLevel(self, level)

Sets the aggressiveness of search for buttons and sizers to be in the non-scrolling part of a layout-adapted dialog.

Zero switches off adaptation, and 3 allows search for standard buttons anywhere in the dialog.

Parameters

level (int) –

Automatic Scrolled Dialogs (for more on layout adaptation)

SetLayoutAdaptationMode(self, mode)

Parameters

static SetLayoutAdapter(adapter)

A static function for setting the current layout adapter object, returning the old adapter.

If you call this, you should delete the old adapter object.

Parameters

Return type

SetReturnCode(self, retCode)

Sets the return code for this window.

A return code is normally associated with a modal dialog, where ShowModal returns a code to the application. The function EndModal calls SetReturnCode .

Parameters

retCode (int) – The integer return code, usually a control identifier.

Show(self, show=True)

Hides or shows the dialog.

The preferred way of dismissing a modal dialog is to use EndModal .

Parameters

show (bool) – If True, the dialog box is shown and brought to the front, otherwise the box is hidden. If False and the dialog is modal, control is returned to the calling program.

Return type

bool

ShowModal(self)

Shows an application-modal dialog.

Program flow does not return until the dialog has been dismissed with EndModal .

Notice that it is possible to call ShowModal for a dialog which had been previously shown with Show , this allows making an existing modeless dialog modal. However ShowModal can’t be called twice without intervening EndModal calls.

Note that this function creates a temporary event loop which takes precedence over the application’s main event loop (see wx.EventLoopBase) and which is destroyed when the dialog is dismissed. This also results in a call to wx.App.ProcessPendingEvents .

Return type

int

Returns

The value set with SetReturnCode .

ShowWindowModal(self)

Shows a dialog modal to the parent top level window only.

Unlike ShowModal , dialogs shown with this function only prevent the user from interacting with their parent frame only but not with the rest of the application. They also don’t block the program execution but instead return immediately, as Show , and generate a wxEVT_WINDOW_MODAL_DIALOG_CLOSED event ( wx.WindowModalDialogEvent) later when the dialog is closed.

Currently this function is only fully implemented in wxOSX ports, under the other platforms it behaves like ShowModal (but also sends the above mentioned event).

New in version 2.9.0.

wx.WindowModalDialogEvent, ShowWindowModalThenDo

__enter__(self)

__exit__(self, exc_type, exc_val, exc_tb)

### Properties¶

AffirmativeId

ContentWindow

EscapeId

LayoutAdaptationDone

LayoutAdaptationLevel

LayoutAdaptationMode

MainButtonIds

ReturnCode