Class Control
Represents a base class for display controls in the user interface.
Assembly: MicroLayout.dll
View Source
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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public virtual bool IsInvalid { get; }
Context
Gets or sets the context object associated with the control.
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public object? Context { get; set; }
Parent
Gets of sets the Control's Paretn, 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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public IControl? Parent { get; set; }
IsVisible
Gets or sets a value indicating whether the control is visible.
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public virtual bool IsVisible { get; set; }
Left
Gets or sets the left coordinate of the control.
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public int Left { get; set; }
Top
Gets or sets the top coordinate of the control.
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public int Top { get; set; }
Width
Gets or sets the width of the control.
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public int Width { get; set; }
Height
Gets or sets the height of the control.
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public int Height { get; set; }
Bottom
Gets the bottom coordinate of the control.
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public int Bottom { get; }
Right
Gets the right coordinate of the control.
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public int Right { get; }
Methods
SetInvalidatingProperty<T>(ref T, T)
Sets a property value and marks the control as invalid, requiring a redraw.
View Source
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.
View Source
public virtual void Invalidate()
Refresh(MicroGraphics)
Refreshes the control by redrawing it on the specified Meadow.Foundation.Graphics.MicroGraphics surface.
View Source
public void Refresh(MicroGraphics graphics)
Parameters
| Type | Name | Description |
|---|---|---|
| Meadow.Foundation.Graphics.MicroGraphics | graphics | The 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.
View Source
protected abstract void OnDraw(MicroGraphics graphics)
Parameters
| Type | Name | Description |
|---|---|---|
| Meadow.Foundation.Graphics.MicroGraphics | graphics | The Meadow.Foundation.Graphics.MicroGraphics surface to draw the control on. |