Class Control

Represents a base class for display controls in the user interface.

Assembly: MicroLayout.dll

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Declaration

public abstract class Control : IControl

Derived:
Meadow.Foundation.Graphics.MicroLayout.ThemedControl

Implements:
Meadow.Foundation.Graphics.MicroLayout.IControl

Properties

IsInvalid

Gets or sets a value indicating whether the control needs to be redrawn.

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Declaration

public virtual bool IsInvalid { get; }

Context

Gets or sets the context object associated with the control.

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Declaration

public object? Context { get; set; }

Parent

Gets of sets the Control's Parent, if it has one. If the Control is unparented (i.e. Parent is null) then it is directly on the DisplayScreen

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Declaration

public virtual IControl? Parent { get; set; }

IsVisible

Gets or sets a value indicating whether the control is visible.

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Declaration

public virtual bool IsVisible { get; set; }

Left

Gets or sets the left coordinate of the control.

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Declaration

public virtual int Left { get; set; }

Top

Gets or sets the top coordinate of the control.

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Declaration

public virtual int Top { get; set; }

Width

Gets or sets the width of the control.

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Declaration

public virtual int Width { get; set; }

Height

Gets or sets the height of the control.

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Declaration

public virtual int Height { get; set; }

Bottom

Gets the bottom coordinate of the control.

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Declaration

public virtual int Bottom { get; }

Right

Gets the right coordinate of the control.

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Declaration

public virtual int Right { get; }

Methods

SetInvalidatingProperty<T>(ref T, T)

Sets a property value and marks the control as invalid, requiring a redraw.

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Declaration

protected void SetInvalidatingProperty<T>(ref T field, T value)

Parameters

Type	Name	Description
<T>	field	The reference to the field to set.
<T>	value	The new value to assign to the property.

Type Parameters

Name	Description
T	The type of the property.

Invalidate()

Marks the control as invalid, requiring a redraw.

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Declaration

public virtual void Invalidate()

Refresh(MicroGraphics)

Refreshes the control by redrawing it on the specified Meadow.Foundation.Graphics.MicroGraphics surface.

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Declaration

public void Refresh(MicroGraphics graphics)

Parameters

Type	Name	Description
Meadow.Foundation.Graphics.MicroGraphics surface to redraw the control on.

OnDraw(MicroGraphics)

Performs the actual drawing of the control on the specified Meadow.Foundation.Graphics.MicroGraphics surface. This method must be implemented in derived classes.

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Declaration

protected abstract void OnDraw(MicroGraphics graphics)

Parameters

Type	Name	Description
Meadow.Foundation.Graphics.MicroGraphics surface to draw the control on.

Implements

• Meadow.Foundation.Graphics.MicroLayout.IControl