Struct pushrod::widgets::text_widget::TextWidget

pub struct TextWidget { /* fields omitted */ }

This is the storage object for the TextWidget. It stores the config, properties, callback registry, the font name, style, size, justification, and text message.

Implementations

impl TextWidget

Creates a new TextWidget, which draws a unit of text on the screen, given the specified font, size, justification, and layout coordinates.

pub fn new(
    font_name: String,
    font_style: FontStyle,
    font_size: i32,
    justification: TextJustify,
    msg: String,
    x: i32,
    y: i32,
    w: u32,
    h: u32
) -> Self

Creates a new TextWidget object. Requires the name of the font (the path to the font file), the style of font (sdl2::ttf::FontStyle), the size in pixels of the font, the TextJustify layout of the font, the message to display, and the x, y, w, h coordinates of the text.

Trait Implementations

impl Widget for TextWidget

This is the Widget implementation of the TextWidget. Text is rendered onto a 3D texture, then copied to the canvas after rendering. It uses blended mode texture mapping, which may be slow (as described by the SDL2 documentation), so this might change later to use 8 bit color mapping.

fn draw(&mut self, c: &mut Canvas<Window>)

Draws the widget. If you wish to modify the canvas object, you must declare it as mut in your implementation (ie fn draw(&mut self, mut canvas: Canvas<Window>)). The _canvas is the currently active drawing canvas at the time this function is called. This called during the draw loop of the Engine.

fn get_config(&mut self) -> &mut WidgetConfig

This function is a macro-created getter function that returns the Widget's configuration object as a borrowed mutable reference. This code is auto-generated using the default_widget_properties!() macro.

fn get_system_properties(&mut self) -> &mut HashMap<i32, String>

This function is a macro-created getter function that returns the Widget's system properties as a borrowed mutable reference. This code is auto-generated using the default_widget_properties!() macro.

fn get_callbacks(&mut self) -> &mut CallbackRegistry

This function is a macro-created getter function that returns the Widget's CallbackRegistry object as a borrowed mutable reference. This code is auto-generated using the default_widget_properties!() macro.

fn tick_callback(&mut self, _widgets: &[WidgetContainer])

This function is a macro-created tick callback override, created by the default_widget_callbacks!() macro.

fn mouse_entered_callback(&mut self, _widgets: &[WidgetContainer])

This function is a macro-created mouse entered callback override, created by the default_widget_callbacks!() macro.

fn mouse_exited_callback(&mut self, _widgets: &[WidgetContainer])

This function is a macro-created mouse exited callback override, created by the default_widget_callbacks!() macro.

fn mouse_moved_callback(
    &mut self,
    _widgets: &[WidgetContainer],
    _points: Vec<i32>
)

This function is a macro-created mouse moved callback override, created by the default_widget_callbacks!() macro.

fn mouse_scrolled_callback(
    &mut self,
    _widgets: &[WidgetContainer],
    _points: Vec<i32>
)

This function is a macro-created mouse scrolled callback override, created by the default_widget_callbacks!() macro.

fn button_clicked_callback(
    &mut self,
    _widgets: &[WidgetContainer],
    _button: u8,
    _clicks: u8,
    _state: bool
)

This function is a macro-created mouse scrolled callback override, created by the default_widget_callbacks!() macro.

fn mouse_entered(&mut self, _widgets: &[WidgetContainer])

When a mouse enters the bounds of the Widget, this function is triggered. This function implementation is optional.

fn mouse_exited(&mut self, _widgets: &[WidgetContainer])

When a mouse exits the bounds of the Widget, this function is triggered. This function implementation is optional.

fn mouse_moved(&mut self, _widgets: &[WidgetContainer], _points: Vec<i32>)

When a mouse moves within the bounds of the Widget, this function is triggered. It contains the X and Y coordinates relative to the bounds of the Widget. The points start at 0x0. This function implementation is optional.

fn mouse_scrolled(&mut self, _widgets: &[WidgetContainer], _points: Vec<i32>)

When a mouse scroll is triggered within the bounds of the Widget, this function is triggered. Movement along the X axis indicate horizontal movement, where the Y axis indicates vertical movement. Positive movement means to the right or down, respectively. Negative movement means to the left or up, respectively. This function implementation is optional.

fn button_clicked(
    &mut self,
    _widgets: &[WidgetContainer],
    _button: u8,
    _clicks: u8,
    _state: bool
)

When a mouse button is clicked within (or outside of) the bounds of the Widget, this function is called. If a mouse button is clicked, and the mouse leaves the bounds of the Widget, the mouse release event will still be triggered for the last Widget which received the mouse down state. This prevents Widgets from becoming confused. This behavior is tracked by the main loop, not by the Widget code. Therefore, when a mouse button is released outside of the bounds of this Widget, you must adjust your state accordingly, if you pay attention to the button_clicked function. This function implementation is optional.

fn tick(&mut self, _widgets: &[WidgetContainer])

When a timer tick goes by (ie. a frame is displayed on the screen), this function is called. This function implementation is optional.

fn set_origin(&mut self, _origin: Vec<i32>)

Sets the origin of the Widget, adjusting the X and Y coordinates. Automatically sets the invalidate flag to true when adjusted, but only if the new origin is not the same as the previous origin.

fn set_size(&mut self, _size: Vec<u32>)

Sets the size of the Widget, adjusting the width and height. Automatically sets the invalidate flag to true when adjusted, but only if the new size is not the same as the previous size.

fn get_drawing_area(&mut self) -> Rect

Returns a Rect object containing the drawing bounds of this Widget.