Interface IDragAutoScrollTarget

Namespace

SharpConsoleUI.Controls

Assembly

SharpConsoleUI.dll

Implemented by selectable controls that participate in drag-select autoscroll. When a text drag-select is active, the control registers itself with the window system; the main loop then drives continuous scrolling each frame while the cursor is held past the viewport edge. All coordinates are CONTROL-RELATIVE rows (matching what the drag handler receives).

public interface IDragAutoScrollTarget

Extension Methods

BindingExtensions.BindTwoWay<TBuilder, TControl, TSource, TValue>(TBuilder, TSource, Expression<Func<TSource, TValue>>, Expression<Func<TControl, TValue>>)

BindingExtensions.BindTwoWay<TBuilder, TControl, TSource, TSrc, TTgt>(TBuilder, TSource, Expression<Func<TSource, TSrc>>, Expression<Func<TControl, TTgt>>, Func<TSrc, TTgt>, Func<TTgt, TSrc>)

BindingExtensions.Bind<TBuilder, TControl, TSource, TValue>(TBuilder, TSource, Expression<Func<TSource, TValue>>, Expression<Func<TControl, TValue>>)

BindingExtensions.Bind<TBuilder, TControl, TSource, TSrc, TTgt>(TBuilder, TSource, Expression<Func<TSource, TSrc>>, Expression<Func<TControl, TTgt>>, Func<TSrc, TTgt>)

Properties

IsDragSelecting

True while a Button1 text-drag-select is in progress.

bool IsDragSelecting { get; }

Property Value

bool

IsViewportReady

True when the control has painted at least once and its viewport metrics are known. The autoscroll tick no-ops until this is true.

bool IsViewportReady { get; }

Property Value

bool

LastDragRelativeY

The last drag Y in control-relative rows. May be negative (above the viewport top) or ≥ ViewportHeightRows (below the bottom) — that overshoot drives the scroll.

int LastDragRelativeY { get; }

Property Value

int

ViewportHeightRows

The control's effective visible viewport height, in rows.

int ViewportHeightRows { get; }

Property Value

int

Methods

AutoScrollStep(int)

Scrolls by rows (sign = direction). The control chooses how (host IScrollableContainer, Window.ScrollBy, or its own offset) and clamps at the scroll extent. A no-op when no scrollable host exists.

void AutoScrollStep(int rows)

Parameters

rows int

ExtendSelectionToRevealedEdge(int)

After a scroll step, extends the selection's end to the edge row now revealed: direction -1 = the new top row, +1 = the new bottom row. Computes the row from the post-scroll position arithmetically (never from the stale pre-paint cache).

void ExtendSelectionToRevealedEdge(int direction)

Parameters

direction int