GUI events

Some of the UI Elements produce a pygame.Event when they are interacted with. These events all follow a common structure that looks something like this:

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : An id for the specific event that has happened. e.g. ‘pygame_gui.UI_BUTTON_PRESSED’
  • ‘ui_element’ : The UI element that fired this event.
  • ‘ui_object_id’ : The most unique ID that applies to the UI element that fired this event. e.g. ‘hud_window.#sell_button’

Though some of the events also have additional data relevant to that event.

Event list

A list of all the different events by element.

UIButton - UI_BUTTON_PRESSED

Fired when a user presses a button by left clicking on it with a mouse, and releasing the mouse button while still hovering over it.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_BUTTON_PRESSED
  • ‘ui_element’ : The UIButton that fired this event.
  • ‘ui_object_id’ : The most unique ID for the button that fired this event.

Example usage:

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 for event in pygame.event.get():
     if event.type == pygame.USEREVENT:
         if event.user_type == pygame_gui.UI_BUTTON_PRESSED:
             if event.ui_element == test_button:
                 print('Test button pressed')

UIButton - UI_BUTTON_DOUBLE_CLICKED

Fired when a user double clicks on a button by left clicking on it with a mouse, then left clicking on it again quickly.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_BUTTON_DOUBLE_CLICKED
  • ‘ui_element’ : The UIButton that fired this event.
  • ‘ui_object_id’ : The most unique ID for the button that fired this event.

Example usage:

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 for event in pygame.event.get():
     if event.type == pygame.USEREVENT:
         if event.user_type == pygame_gui.UI_BUTTON_DOUBLE_CLICKED:
             if event.ui_element == test_button:
                 print('Test button pressed')

UIButton - UI_BUTTON_ON_HOVERED

Fired when a user starts hovering over a button with the mouse.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_BUTTON_ON_HOVERED
  • ‘ui_element’ : The UIButton that fired this event.
  • ‘ui_object_id’ : The most unique ID for the button that fired this event.

Example usage:

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 for event in pygame.event.get():
     if event.type == pygame.USEREVENT:
         if event.user_type == pygame_gui.UI_BUTTON_ON_HOVERED:
             if event.ui_element == test_button:
                 print('Test button hovered')

UIButton - UI_BUTTON_ON_UNHOVERED

Fired when a user stops hovering over a button with the mouse.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_BUTTON_ON_UNHOVERED
  • ‘ui_element’ : The UIButton that fired this event.
  • ‘ui_object_id’ : The most unique ID for the button that fired this event.

Example usage:

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 for event in pygame.event.get():
     if event.type == pygame.USEREVENT:
         if event.user_type == pygame_gui.UI_BUTTON_ON_UNHOVERED:
             if event.ui_element == test_button:
                 print('Test button unhovered')

UITextEntryLine - UI_TEXT_ENTRY_CHANGED

Fired when a user changes the text in a text entry element by entering of deleting text. Not fired when set_text() is used.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_TEXT_ENTRY_CHANGED,
  • ‘text’ : The user entered text in the text entry line.
  • ‘ui_element’ : The UITextEntryLine that fired this event.
  • ‘ui_object_id’ : The most unique ID for the text entry line that fired this event.

Example usage:

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 for event in pygame.event.get():
     if event.type == pygame.USEREVENT:
         if event.user_type == pygame_gui.UI_TEXT_ENTRY_CHANGED:
             print("Changed text:", event.text)

UITextEntryLine - UI_TEXT_ENTRY_FINISHED

Fired when a user presses the enter key with a text entry element active for entry.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_TEXT_ENTRY_FINISHED,
  • ‘text’ : The user entered text in the text entry line.
  • ‘ui_element’ : The UITextEntryLine that fired this event.
  • ‘ui_object_id’ : The most unique ID for the text entry line that fired this event.

Example usage:

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 for event in pygame.event.get():
     if event.type == pygame.USEREVENT:
         if event.user_type == pygame_gui.UI_TEXT_ENTRY_FINISHED:
             print("Entered text:", event.text)

UIDropDownMenu - UI_DROP_DOWN_MENU_CHANGED

Fired when a user selects an option in a drop down menu.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_DROP_DOWN_MENU_CHANGED,
  • ‘text’ : The text of the selected option.
  • ‘ui_element’ : The UIDropDownMenu that fired this event.
  • ‘ui_object_id’ : The most unique ID for the drop down menu that fired this event.

Example usage:

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 for event in pygame.event.get():
     if event.type == pygame.USEREVENT:
         if event.user_type == pygame_gui.UI_DROP_DOWN_MENU_CHANGED:
             print("Selected option:", event.text)

UIHorizontalSlider - UI_HORIZONTAL_SLIDER_MOVED

Fired when a user moves a horizontal slider by pressing an arrow button or dragging the sliding button.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_HORIZONTAL_SLIDER_MOVED
  • ‘value’ : The current value the slider is set to.
  • ‘ui_element’ : The UIHorizontalSlider that fired this event.
  • ‘ui_object_id’ : The most unique ID for the button that fired this event.

Example usage:

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 for event in pygame.event.get():
     if event.type == pygame.USEREVENT:
         if event.user_type == pygame_gui.UI_HORIZONTAL_SLIDER_MOVED:
             if event.ui_element == test_slider:
                 print('current slider value:', event.value)

UISelectionList - UI_SELECTION_LIST_NEW_SELECTION

Fired when a user selects a new item in a selection list.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_SELECTION_LIST_NEW_SELECTION,
  • ‘text’ : The text of the selected item.
  • ‘ui_element’ : The UISelectionList that fired this event.
  • ‘ui_object_id’ : The most unique ID for the element that fired this event.

Example usage:

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for event in pygame.event.get():
   if event.type == pygame.USEREVENT:
      if event.user_type == pygame_gui.UI_SELECTION_LIST_NEW_SELECTION:
         if event.ui_element == test_selection_list:
            print("Selected item:", event.text)

UISelectionList - UI_SELECTION_LIST_DROPPED_SELECTION

Fired when a user un-selects an item, dropping it from a selection list.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_SELECTION_LIST_DROPPED_SELECTION,
  • ‘text’ : The text of the dropped item.
  • ‘ui_element’ : The UISelectionList that fired this event.
  • ‘ui_object_id’ : The most unique ID for the element that fired this event.

Example usage:

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for event in pygame.event.get():
   if event.type == pygame.USEREVENT:
      if event.user_type == pygame_gui.UI_SELECTION_LIST_DROPPED_SELECTION:
         if event.ui_element == test_selection_list:
            print("Dropped item:", event.text)

UISelectionList - UI_SELECTION_LIST_DOUBLE_CLICKED_SELECTION

Fired when a user double clicks on an item in a selection list.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_SELECTION_LIST_DOUBLE_CLICKED_SELECTION,
  • ‘text’ : The text of the double clicked item.
  • ‘ui_element’ : The UISelectionList that fired this event.
  • ‘ui_object_id’ : The most unique ID for the element that fired this event.

Example usage:

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for event in pygame.event.get():
   if event.type == pygame.USEREVENT:
      if event.user_type == pygame_gui.UI_SELECTION_LIST_DOUBLE_CLICKED_SELECTION:
         if event.ui_element == test_selection_list:
            print("Double clicked item:", event.text)

UIWindow - UI_WINDOW_CLOSE

Fired when a window is closed.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_WINDOW_CLOSE,
  • ‘ui_element’ : The UIWindow that fired this event.
  • ‘ui_object_id’ : The most unique ID for the element that fired this event.

Example usage:

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for event in pygame.event.get():
   if event.type == pygame.USEREVENT:
      if event.user_type == pygame_gui.UI_WINDOW_CLOSE:
         if event.ui_element == window:
            print("Window closed")

UIWindow - UI_WINDOW_MOVED_TO_FRONT

Fired when a UI window is moved to the top of the stack. This happens when they are newly created and when they are clicked on by a user.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_WINDOW_MOVED_TO_FRONT,
  • ‘ui_element’ : The UIWindow that fired this event.
  • ‘ui_object_id’ : The most unique ID for the element that fired this event.

Example usage:

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for event in pygame.event.get():
   if event.type == pygame.USEREVENT:
      if event.user_type == pygame_gui.UI_WINDOW_CLOSE:
         if event.ui_element == window:
            print("Window closed")

UIConfirmationDialog - UI_CONFIRMATION_DIALOG_CONFIRMED

Fired when the ‘confirm’ button is chosen in a confirmation dialog.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_CONFIRMATION_DIALOG_CONFIRMED,
  • ‘ui_element’ : The UIConfirmationDialog that fired this event.
  • ‘ui_object_id’ : The most unique ID for the element that fired this event.

Example usage:

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for event in pygame.event.get():
   if event.type == pygame.USEREVENT:
      if event.user_type == pygame_gui.UI_CONFIRMATION_DIALOG_CONFIRMED:
         if event.ui_element == confirmation_dialog:
            print("Confirming action.")

UIFileDialog - UI_FILE_DIALOG_PATH_PICKED

Fired when a path has been chosen in a file dialog.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_FILE_DIALOG_PATH_PICKED
  • ‘text’ : The path picked.
  • ‘ui_element’ : The UIFileDialog that fired this event.
  • ‘ui_object_id’ : The most unique ID for the element that fired this event.

Example usage:

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for event in pygame.event.get():
   if event.type == pygame.USEREVENT:
      if event.user_type == pygame_gui.UI_FILE_DIALOG_PATH_PICKED:
         if event.ui_element == file_dialog:
            print("Path picked:", event.text)

UIColourPickerDialog - UI_COLOUR_PICKER_COLOUR_PICKED

Fired when a colour has been chosen in a colour picker dialog.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_COLOUR_PICKER_COLOUR_PICKED
  • ‘colour’ : The colour picked.
  • ‘ui_element’ : The UIColourPickerDialog that fired this event.
  • ‘ui_object_id’ : The most unique ID for the element that fired this event.

Example usage:

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for event in pygame.event.get():
   if event.type == pygame.USEREVENT:
      if event.user_type == pygame_gui.UI_COLOUR_PICKER_COLOUR_PICKED:
         if event.ui_element == colour_picker:
            print("Colour picked:", event.colour)

UIColourChannelEditor - UI_COLOUR_PICKER_COLOUR_CHANNEL_CHANGED

Fired when a colour channel element has had it’s value changed. This event is used by the colour picker dialog.

  • ‘type’ : pygame.USEREVENT
  • ‘user_type’ : pygame_gui.UI_COLOUR_PICKER_COLOUR_CHANNEL_CHANGED
  • ‘value’ : The current value of the channel.
  • ‘channel_index’ : The index of this colour channel in the colour (R=0, G=1, B=2 etc).
  • ‘ui_element’ : The UIColourChannelEditor that fired this event.
  • ‘ui_object_id’ : The most unique ID for the element that fired this event.

Example usage:

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for event in pygame.event.get():
   if event.type == pygame.USEREVENT:
      if event.user_type == pygame_gui.UI_COLOUR_PICKER_COLOUR_CHANNEL_CHANGED:
         if event.ui_element == colour_channel:
            print("Colour channel value:", event.value)