Struct Label 

pub struct Label { /* private fields */ }

A non-interactive control that displays static text.

Label renders a caption (which may include a hotkey) and does not accept focus or input. It is used for titles, descriptions, and other read-only text.

Implementations

impl Label

pub fn new(caption: &str, layout: Layout) -> Self

Creates a new label with the specified caption and layout. The caption can contain a hotkey (e.g. “File &Open”) and the layout is used to position the label on the screen. The label is a read-only control that can be used to display text on the screen. The label is not a focusable control and it does not accept any input.

Example

use appcui::prelude::*;
 
let mut label = Label::new("My Label", layout!("x:1,y:1,w:30"));

pub fn set_caption(&mut self, text: &str)

pub fn caption(&self) -> &str

Methods from Deref<Target = ControlBase>

pub fn size(&self) -> Size

Returns the size of a control

pub fn client_size(&self) -> Size

Returns the client size of a control. In most cases it is the same as the size returned the method .get_size(). However, if the control has margins (for example in case of a Window) this size will be smaller.

pub fn set_size(&mut self, width: u16, height: u16)

Sets the new size for a control (to a specified size given by parameters width and height). Keep in mind that this method will change the existing layout to an a layout based on top-left corner (given by controls x and y coordonates) and the new provided size. Any dock or alignment properties will be removed. This method has no effect on a Desktop control.

pub fn position(&self) -> Point

Returns the relatove position (x,y) of the current control to its parent.

pub fn set_position(&mut self, x: i32, y: i32)

Sets the new position for a control (to a specified coordonate given by parameters x and y). Keep in mind that this method will change the existing layout to an a layout based on top-left corner (given by coordonates x and y) and the controls current width and height. Any dock or alignment properties will be removed. This method has no effect on a Desktop control.

pub fn set_enabled(&mut self, enabled: bool)

Sets the enabled state of a control. This method has no effect on a Desktop or a Window control that will always be enabled.

pub fn set_visible(&mut self, visible: bool)

Can be used to make a control visible or not. This method has no effect on the Desktop control that will always be visible.

Examples

use appcui::prelude::*;
let mut button = button!("'Click me',x:1,y:1,w:15");
button.set_visible(false); // this will hide the button

pub fn set_components_toolbar_margins(&mut self, left: u8, top: u8)

pub fn expanded_size(&self) -> Size

pub fn request_focus(&mut self) -> bool

A control can use this method to request focus

pub fn timer(&mut self) -> Option<&mut Timer>

pub fn is_visible(&self) -> bool

Returns true if the current control is visible or false otherwise

pub fn is_enabled(&self) -> bool

Returns true if the current control is enabled or false otherwise

pub fn is_active(&self) -> bool

Returns true if the current control is active (enabled and visible at the same time) or false otherwise

pub fn can_receive_input(&self) -> bool

Returns true if the current control can receive focus or false otherwise. If the control is not visible or it is disable this function will return false.

pub fn has_focus(&self) -> bool

Returns true if the current control has the focus or false otherwise

pub fn is_mouse_over(&self) -> bool

Returns true if the mouse cursor is over the current control or false otherwise

pub fn set_size_bounds( &mut self, min_width: u16, min_height: u16, max_width: u16, max_height: u16, )

Sets the bounds (minim and maxim sized allowed for a control). If the size of a control is outside its bounds, its size will be adjusted automatically. This method has no effect on a Desktop control.

pub fn set_hotkey<T>(&mut self, hotkey: T)

where Key: From<T>,

Sets the hot-key associated with a control. Use Key::None to clear an existing hotkey

pub fn hotkey(&self) -> Key

Returns the hotkey associated to a control or Key::None otherwise.

pub fn raise_custom_event(&self, class_hash: u64, event_id: u32)

pub fn request_update(&self)

pub fn register_menu(&mut self, menu: Menu) -> Handle<Menu>

pub fn show_menu( &self, handle: Handle<Menu>, x: i32, y: i32, max_size: Option<Size>, )

pub fn menuitem<T>( &self, menu_handle: Handle<Menu>, menuitem_handle: Handle<T>, ) -> Option<&T>

where T: MenuItem,

pub fn menuitem_mut<T>( &mut self, menu_handle: Handle<Menu>, menuitem_handle: Handle<T>, ) -> Option<&mut T>

where T: MenuItem,

pub fn appbar(&mut self) -> &mut AppBar

pub fn theme(&self) -> &Theme

pub fn update_layout(&mut self, layout: Layout)

Updates the layout of the current control

Trait Implementations

impl AccordionEvents for Label

fn on_panel_changed( &mut self, _handle: Handle<Accordion>, _new_panel_index: u32, _old_panel_index: u32, ) -> EventProcessStatus

Called when the expanded panel changes from old_panel_index to new_panel_index.

impl AppBarEvents for Label

fn on_button_click(&mut self, _button: Handle<Button>)

Called when a button is clicked.

fn on_togglebutton_state_changed( &mut self, _togglebutton: Handle<ToggleButton>, _selected: bool, )

Called when a toggle button’s state changes.

fn on_switchbutton_state_changed( &mut self, _switchbutton: Handle<SwitchButton>, _selected: bool, )

Called when a switch button’s state changes.

fn on_update(&self, _appbar: &mut AppBar)

Called when the app bar needs to be updated. By default, all items are hidden and whenever the focus changes, the AppCUI framework hides all items and starts from the focus control and moves to its parent and calls this method. In this method you should call appbar.show(…) method to show the items you want to show.

impl ButtonEvents for Label

fn on_pressed(&mut self, _handle: Handle<Button>) -> EventProcessStatus

Called when the button is pressed (mouse click or keyboard activate).

impl CharPickerEvents for Label

fn on_char_changed( &mut self, _handle: Handle<CharPicker>, _code: Option<char>, ) -> EventProcessStatus

Called when the selection changes. code is None if the picker was cleared.

impl CheckBoxEvents for Label

fn on_status_changed( &mut self, _handle: Handle<CheckBox>, _checked: bool, ) -> EventProcessStatus

Called when the check box is toggled. checked is the new state.

impl ColorPickerEvents for Label

fn on_color_changed( &mut self, _handle: Handle<ColorPicker>, _color: Color, ) -> EventProcessStatus

Called when the selected color changes.

impl ComboBoxEvents for Label

fn on_selection_changed( &mut self, _handle: Handle<ComboBox>, ) -> EventProcessStatus

Called when a different item is selected.

impl Control for Label

impl CustomEvents for Label

fn on_event( &mut self, _handle: Handle<()>, _class_hash: u64, _event_id: u32, ) -> EventProcessStatus

Handles a custom event from handle. class_hash identifies the sender type and event_id the event.

impl DatePickerEvents for Label

fn on_date_changed( &mut self, _handle: Handle<DatePicker>, _date: NaiveDate, ) -> EventProcessStatus

Called when the selected date changes.

impl Deref for Label

type Target = ControlBase

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl DerefMut for Label

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl DesktopEvents for Label

fn on_start(&mut self)

Called once when the desktop starts (application launch).

fn on_close(&mut self) -> ActionRequest

Called when the user tries to close the desktop. Return ActionRequest::Deny to cancel.

fn on_update_window_count(&mut self, _count: usize)

Called whenever the number of open windows changes to count.

impl GenericBackgroundTaskEvents for Label

fn on_start(&mut self, _handle: Handle<()>) -> EventProcessStatus

The background task has started.

fn on_update(&mut self, _handle: Handle<()>) -> EventProcessStatus

The background task reported progress.

fn on_finish(&mut self, _handle: Handle<()>) -> EventProcessStatus

The background task finished.

fn on_query(&mut self, _handle: Handle<()>) -> EventProcessStatus

The background task is querying the UI (for example for cancellation).

impl GenericBufferViewEvents for Label

fn on_current_pos_changed( &mut self, _handle: Handle<()>, _type_id: TypeId, ) -> EventProcessStatus

Called when the current byte position changes inside a super::BufferView.

fn on_selection_changed( &mut self, _handle: Handle<()>, _type_id: TypeId, ) -> EventProcessStatus

Called when the selected byte range changes inside a super::BufferView.

impl GenericCommandBarEvents for Label

fn on_update_commandbar(&self, _commandbar: &mut CommandBar)

Called when the command bar should be rebuilt. Add commands with commandbar.set(...).

fn on_event(&mut self, _command_id: u32)

Called when the user activates the command with identifier command_id.

impl GenericDropDownListEvents for Label

fn on_selection_changed( &mut self, _handle: Handle<()>, _type_id: TypeId, ) -> EventProcessStatus

Called when the selected item changes.

impl GenericGraphViewEvents for Label

fn on_current_node_changed( &mut self, _handle: Handle<()>, _type_id: TypeId, ) -> EventProcessStatus

Called when the highlighted node changes.

fn on_node_action( &mut self, _handle: Handle<()>, _type_id: TypeId, _node_index: usize, ) -> EventProcessStatus

Called when the user activates the node at node_index (Enter or double-click).

fn on_request_new_node( &mut self, _handle: Handle<()>, _type_id: TypeId, _p: Point, ) -> EventProcessStatus

Called when the user requests a new node at point p.

fn on_request_new_edge( &mut self, _handle: Handle<()>, _type_id: TypeId, _from: u32, _to: u32, ) -> EventProcessStatus

Called when the user requests a new edge from node from to node to.

fn on_selection_changed( &mut self, _handle: Handle<()>, _type_id: TypeId, ) -> EventProcessStatus

Called when the set of selected nodes changes.

impl GenericHSliderEvents for Label

fn on_value_changed( &mut self, _handle: Handle<()>, _type_id: TypeId, ) -> EventProcessStatus

Called when the slider value changes.

impl GenericListViewEvents for Label

fn on_current_item_changed( &mut self, _handle: Handle<()>, _type_id: TypeId, ) -> EventProcessStatus

Called when the highlighted item changes.

fn on_group_collapsed( &mut self, _handle: Handle<()>, _type_id: TypeId, _group: Group, ) -> EventProcessStatus

Called when group is collapsed.

fn on_group_expanded( &mut self, _handle: Handle<()>, _type_id: TypeId, _group: Group, ) -> EventProcessStatus

Called when group is expanded.

fn on_selection_changed( &mut self, _handle: Handle<()>, _type_id: TypeId, ) -> EventProcessStatus

Called when the set of selected items changes.

fn on_item_action( &mut self, _handle: Handle<()>, _type_id: TypeId, _index: usize, ) -> EventProcessStatus

Called when the user activates the item at index (Enter or double-click).

impl GenericMenuEvents for Label

fn on_menu_open(&self, _menu: &mut Menu)

Called when a menu is about to be opened.

fn on_command( &mut self, _menu: Handle<Menu>, _item: Handle<Command>, _command: u32, )

Called when a command menu item is activated.

fn on_check( &mut self, _menu: Handle<Menu>, _item: Handle<CheckBox>, _command: u32, _checked: bool, )

Called when a checkbox menu item’s state changes.

fn on_select( &mut self, _menu: Handle<Menu>, _item: Handle<SingleChoice>, _command: u32, )

Called when a single choice menu item is selected.

impl GenericNumericSelectorEvents for Label

fn on_value_changed( &mut self, _handle: Handle<()>, _type_id: TypeId, ) -> EventProcessStatus

Called when the numeric value changes.

impl GenericSelectorEvents for Label

fn on_selection_changed( &mut self, _handle: Handle<()>, _type_id: TypeId, ) -> EventProcessStatus

Called when the selected enum variant changes.

impl GenericTreeViewEvents for Label

fn on_current_item_changed( &mut self, _handle: Handle<()>, _type_id: TypeId, _current_item: Handle<()>, ) -> EventProcessStatus

Called when the highlighted item changes to current_item.

fn on_item_collapsed( &mut self, _handle: Handle<()>, _type_id: TypeId, _item: Handle<()>, _recursive: bool, ) -> EventProcessStatus

Called when item is collapsed. recursive is true if children were collapsed too.

fn on_item_expanded( &mut self, _handle: Handle<()>, _type_id: TypeId, _item: Handle<()>, _recursive: bool, ) -> EventProcessStatus

Called when item is expanded. recursive is true if children were expanded too.

fn on_selection_changed( &mut self, _handle: Handle<()>, _type_id: TypeId, ) -> EventProcessStatus

Called when the set of selected items changes.

fn on_item_action( &mut self, _handle: Handle<()>, _type_id: TypeId, _current_item: Handle<()>, ) -> EventProcessStatus

Called when the user activates current_item (Enter or double-click).

impl HyperLinkEvents for Label

fn on_open(&mut self, _handle: Handle<HyperLink>) -> EventProcessStatus

Called when the hyperlink is opened (clicked or activated).

impl KeySelectorEvents for Label

fn on_key_changed( &mut self, _handle: Handle<KeySelector>, _new_key: Key, _old_key: Key, ) -> EventProcessStatus

Called when the key changes from old_key to new_key.

impl ListBoxEvents for Label

fn on_current_item_changed( &mut self, _handle: Handle<ListBox>, _index: usize, ) -> EventProcessStatus

Called when the highlighted item changes to index.

fn on_item_checked( &mut self, _handle: Handle<ListBox>, _index: usize, _checked: bool, ) -> EventProcessStatus

Called when the check box on the item at index is toggled to checked.

impl MarkdownEvents for Label

fn on_external_link( &mut self, _handle: Handle<Markdown>, _link: &str, ) -> EventProcessStatus

Called when the user activates an external link in the document.

fn on_backspace_navigation( &mut self, _handle: Handle<Markdown>, ) -> EventProcessStatus

Called when the user navigates back with Backspace.

impl NotDesktop for Label

impl NotWindow for Label

impl OnDefaultAction for Label

fn on_default_action(&mut self)

Runs the control’s default action.

impl OnExpand for Label

fn on_expand(&mut self, _direction: ExpandedDirection)

The control expanded in direction (ExpandedDirection::OnTop or OnBottom).

fn on_pack(&mut self)

The control collapsed back to its packed size.

impl OnFocus for Label

fn on_focus(&mut self)

The control received focus.

fn on_lose_focus(&mut self)

The control lost focus.

impl OnKeyPressed for Label

fn on_key_pressed(&mut self, _key: Key, _character: char) -> EventProcessStatus

Handles a key press. character is the translated character, or '\0' for non-character keys.

impl OnMouseEvent for Label

fn on_mouse_event(&mut self, _event: &MouseEvent) -> EventProcessStatus

Handles a mouse MouseEvent (move, click, wheel, and similar).

impl OnPaint for Label

fn on_paint(&self, surface: &mut Surface, theme: &Theme)

Paints the control onto surface using the current theme.

impl OnResize for Label

fn on_resize(&mut self, _old_size: Size, _new_size: Size)

Notifies that the control was resized from old_size to new_size.

impl OnSiblingSelected for Label

fn on_sibling_selected(&mut self, _handle: Handle<()>)

handle identifies the sibling that became selected.

impl OnThemeChanged for Label

fn on_theme_changed(&mut self, _theme: &Theme)

Reloads colors or other theme-dependent state from theme.

impl OnWindowRegistered for Label

fn on_registered(&mut self)

The control is now attached to a window and can use window services.

impl PasswordEvents for Label

fn on_accept(&mut self, _handle: Handle<Password>) -> EventProcessStatus

Called when the user confirms the password (typically Enter).

fn on_cancel(&mut self, _handle: Handle<Password>) -> EventProcessStatus

Called when the user cancels (typically Escape).

impl PathFinderEvents for Label

fn on_path_updated(&mut self, _handle: Handle<PathFinder>) -> EventProcessStatus

Called when the current path is updated (typed or navigated).

impl RadioBoxEvents for Label

fn on_selected(&mut self, _handle: Handle<RadioBox>) -> EventProcessStatus

Called when this radio box is selected (others in the group are cleared).

impl RichTextFieldEvents for Label

fn on_validate( &mut self, _handle: Handle<RichTextField>, _text: &str, ) -> EventProcessStatus

Called when the user confirms the text (Enter or similar).

fn on_text_changed( &mut self, _handle: Handle<RichTextField>, ) -> EventProcessStatus

Called after the text content changes.

impl TabEvents for Label

fn on_tab_changed( &mut self, _handle: Handle<Tab>, _new_tab_index: u32, _old_tabl_index: u32, ) -> EventProcessStatus

Called when the selected page changes from old_tabl_index to new_tab_index.

impl TextFieldEvents for Label

fn on_validate( &mut self, _handle: Handle<TextField>, _text: &str, ) -> EventProcessStatus

Called when the user confirms the text (Enter, if super::Flags::ProcessEnter is set).

fn on_text_changed(&mut self, _handle: Handle<TextField>) -> EventProcessStatus

Called after the text content changes.

impl ThreeStateBoxEvents for Label

fn on_status_changed( &mut self, _handle: Handle<ThreeStateBox>, _state: State, ) -> EventProcessStatus

Called when the state changes to state (checked, unchecked, or unknown).

impl TimePickerEvents for Label

fn on_time_changed( &mut self, _handle: Handle<TimePicker>, _time: NaiveTime, ) -> EventProcessStatus

Called when the selected time changes.

impl TimerEvents for Label

fn on_start(&mut self) -> EventProcessStatus

The timer has started.

fn on_resume(&mut self, _ticks: u64) -> EventProcessStatus

The timer resumed after a pause. ticks is the count at resume.

fn on_pause(&mut self, _ticks: u64) -> EventProcessStatus

The timer was paused. ticks is the count at pause.

fn on_update(&mut self, _ticks: u64) -> EventProcessStatus

A periodic tick. ticks is the current count.

impl ToggleButtonEvents for Label

fn on_selection_changed( &mut self, _handle: Handle<ToggleButton>, _selected: bool, ) -> EventProcessStatus

Called when the toggle button is toggled. selected is the new pressed state.

impl ToolBarEvents for Label

fn on_button_clicked(&mut self, _handle: Handle<Button>) -> EventProcessStatus

Called when a toolbar button is clicked.

fn on_checkbox_clicked( &mut self, _handle: Handle<CheckBox>, _checked: bool, ) -> EventProcessStatus

Called when a toolbar checkbox is clicked, changing its checked state.

fn on_choice_selected( &mut self, _handle: Handle<SingleChoice>, ) -> EventProcessStatus

Called when a toolbar single choice item is selected.

impl WindowEvents for Label

fn on_layout_changed(&mut self, _old_layout: Rect, _new_layout: Rect)

Called after the window’s rectangle changes from old_layout to new_layout.

fn on_activate(&mut self)

called whenver the window receives focus

fn on_deactivate(&mut self)

called whenever the window loses focus.

fn on_accept(&mut self)

called whenever the ENTER key is intercepted by the Window For modal windows the behavior should be to use .exit_with(...) method to exit. for a regular (non-modal) window this callback is never called)

fn on_cancel(&mut self) -> ActionRequest

called whenever the ESC key is interpreted by the Window