Marquee

Remarks

Two corners rather than an origin and a size, because a drag goes in any direction. Storing a width and a height means every consumer has to cope with a negative one, and the one that forgets is the hit test rather than the drawing — so a band dragged up and to the left selects nothing while looking exactly like one that works.

⚠ A band smaller than MinimumSize is a click. Nobody presses a mouse button without moving the pointer a pixel or two, so a marquee that resolved at any size at all would take every click in empty space away from the picker — which is the gesture that deselects. The threshold is in render pixels and is deliberately generous.

Fields and properties (11)

• public Vector2 Anchor

  Where the drag started, in render pixels from the pane's top-left.

• public Vector2 Corner

  Where the pointer is now.

• public bool Additive

  Whether the result extends the selection rather than replacing it.

• public const float MinimumSize

  How far the pointer has to travel before a press becomes a band, in render pixels.

• public float Left

  The left edge.

• public float Top

  The top edge.

• public float Right

  The right edge.

• public float Bottom

  The bottom edge.

• public float Width

  How wide, never negative.

• public float Height

  How tall, never negative.

• public bool IsBand

  Whether the drag has gone far enough to be a band rather than a click.

Methods (4)

• public Marquee(Vector2 Anchor, Vector2 Corner, bool Additive)

  A rubber-band rectangle being dragged across a pane, in render pixels.

• public bool Contains(Vector2 point)

  Whether a point in render pixels is inside the band.

• public bool Touches(float left, float top, float right, float bottom)

  Whether an axis-aligned rectangle in render pixels touches the band.

• public Marquee To(Vector2 corner)

  The same band with the pointer somewhere else.

Used by (9)

• IScenePickerVixen.Editor.SceneView
• ISubObjectPickerVixen.Editor.SceneView
• MarqueeOverlayVixen.Editor.SceneView
• MarqueeTestsVixen.Editor.SceneView.Tests
• NothingPickerVixen.Editor.SceneView.Tests
• ScenePickerVixen.Editor.SceneView
• SceneViewportVixen.Editor.SceneView
• SubObjectPickerVixen.Editor.SceneView
• SubObjectTestsVixen.Editor.SceneView.Tests