89 lines
3.1 KiB
Go
89 lines
3.1 KiB
Go
package tomo
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// Event represents any event. Use a type switch to figure out what sort of
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// event it is.
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type Event interface { }
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// EventResize is sent to an element when its parent decides to resize it.
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// Elements should not do anything if the width and height do not change.
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type EventResize struct {
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// The width and height the element should not be less than the
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// element's reported minimum width and height. If by some chance they
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// are anyways, the element should use its minimum width and height
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// instead.
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Width, Height int
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}
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// EventKeyDown is sent to the currently selected element when a key on the
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// keyboard is pressed. Containers must propagate this event downwards.
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type EventKeyDown struct {
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Key
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Modifiers
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Repeated bool
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}
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// EventKeyDown is sent to the currently selected element when a key on the
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// keyboard is released. Containers must propagate this event downwards.
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type EventKeyUp struct {
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Key
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Modifiers
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}
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// EventMouseDown is sent to the element the mouse is positioned over when it is
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// clicked. Containers must propagate this event downwards, with X and Y values
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// relative to the top left corner of the child element.
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type EventMouseDown struct {
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// The button that was released
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Button
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// The X and Y position of the mouse cursor at the time of the event,
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// relative to the top left corner of the element
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X, Y int
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}
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// EventMouseUp is sent to the element that was positioned under the mouse the
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// last time this particular mouse button was pressed down when it is released.
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// Containers must propagate this event downwards, with X and Y values relative
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// to the top left corner of the child element.
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type EventMouseUp struct {
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// The button that was released
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Button
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// The X and Y position of the mouse cursor at the time of the event,
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// relative to the top left corner of the element
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X, Y int
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}
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// EventMouseMove is sent to the element positioned under the mouse cursor when
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// the mouse moves, or if a mouse button is currently being pressed, the element
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// that the mouse was positioned under when it was pressed down. Containers must
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// propogate this event downwards, with X and Y values relative to the top left
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// corner of the child element.
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type EventMouseMove struct {
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// The X and Y position of the mouse cursor at the time of the event,
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// relative to the top left corner of the element
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X, Y int
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}
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// EventScroll is sent to the element positioned under the mouse cursor when the
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// scroll wheel (or equivalent) is spun. Containers must propogate this event
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// downwards.
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type EventScroll struct {
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// The X and Y position of the mouse cursor at the time of the event,
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// relative to the top left corner of the element
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X, Y int
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// The X and Y amount the scroll wheel moved
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ScrollX, ScrollY int
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}
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// EventSelect is sent to selectable elements when they become selected, whether
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// by a mouse click or by keyboard navigation. Containers must propagate this
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// event downwards.
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type EventSelect struct { }
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// EventDeselect is sent to selectable elements when they stop being selected,
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// whether by a mouse click or by keyboard navigation. Containers must propagate
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// this event downwards.
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type EventDeselect struct { }
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