OvalShape Class
Represents a control displayed as a circle or oval.
Inheritance Hierarchy
System.Object
System.MarshalByRefObject
System.ComponentModel.Component
Microsoft.VisualBasic.PowerPacks.Shape
Microsoft.VisualBasic.PowerPacks.SimpleShape
Microsoft.VisualBasic.PowerPacks.OvalShape
Namespace: Microsoft.VisualBasic.PowerPacks
Assembly: Microsoft.VisualBasic.PowerPacks.Vs (in Microsoft.VisualBasic.PowerPacks.Vs.dll)
Syntax
'宣告
<ToolboxBitmapAttribute(GetType(OvalShape), "Microsoft.VisualBasic.PowerPacks.OvalShape.bmp")> _
Public Class OvalShape _
Inherits SimpleShape
[ToolboxBitmapAttribute(typeof(OvalShape), "Microsoft.VisualBasic.PowerPacks.OvalShape.bmp")]
public class OvalShape : SimpleShape
[ToolboxBitmapAttribute(typeof(OvalShape), L"Microsoft.VisualBasic.PowerPacks.OvalShape.bmp")]
public ref class OvalShape : public SimpleShape
[<ToolboxBitmapAttribute(typeof(OvalShape), "Microsoft.VisualBasic.PowerPacks.OvalShape.bmp")>]
type OvalShape =
class
inherit SimpleShape
end
public class OvalShape extends SimpleShape
The OvalShape type exposes the following members.
Constructors
| Name | Description | |
|---|---|---|
.gif "Public method") |
OvalShape() | Initializes a new instance of the OvalShape class. |
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OvalShape(ShapeContainer) | Initializes a new instance of the OvalShape class, specifying the ShapeContainer in which it will be contained. |
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OvalShape(Int32, Int32, Int32, Int32) | Initializes a new instance of the OvalShape class, specifying its location and size. |
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Properties
| Name | Description | |
|---|---|---|
.gif "Public property") |
AccessibilityObject | Gets the AccessibleObject that is assigned to the control. (Inherited from Shape.) |
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AccessibleDefaultActionDescription | Gets or sets the default action description of the control for use by accessibility client applications. (Inherited from Shape.) |
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AccessibleDescription | Gets or sets the description of the control that is used by accessibility client applications. (Inherited from Shape.) |
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AccessibleName | Gets or sets the name of the control that is used by accessibility client applications. (Inherited from Shape.) |
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AccessibleRole | Gets or sets the accessible role of the control. (Inherited from Shape.) |
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Anchor | Gets or sets the edges of the container to which a shape is bound, and determines how a shape is resized when its parent is resized. (Inherited from Shape.) |
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BackColor | Gets or sets the background color for the shape. (Inherited from SimpleShape.) |
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BackgroundImage | Gets or sets the image displayed in the shape. (Inherited from SimpleShape.) |
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BackgroundImageLayout | Gets or sets the background image layout as defined in the ImageLayout enumeration. (Inherited from SimpleShape.) |
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BackStyle | Gets or sets the transparency of the shape. (Inherited from SimpleShape.) |
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BorderColor | Gets or sets the color of the border of a shape or line control. (Inherited from Shape.) |
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BorderStyle | Gets or sets the border style for a shape or line control. (Inherited from Shape.) |
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BorderWidth | Gets or sets the width of the shape control's border. (Inherited from SimpleShape.) |
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Bottom | Gets the distance, in pixels, between the bottom edge of the shape and the top edge of its container's client area. (Inherited from SimpleShape.) |
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Bounds | Gets or sets the size and location of the shape in pixels, relative to the parent control. (Inherited from SimpleShape.) |
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CanFocus | Gets a value indicating whether a line or shape control can receive focus. (Inherited from Shape.) |
.gif "Protected property") |
CanRaiseEvents | Gets a value indicating whether the component can raise an event. (Inherited from Component.) |
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CanSelect | Gets a value indicating whether a line or shape control can be selected. (Inherited from Shape.) |
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ClientRectangle | Gets the rectangle that represents the client area of the shape. (Inherited from SimpleShape.) |
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ClientSize | Gets or sets the height and width of the client area of the shape. (Inherited from SimpleShape.) |
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Container | Gets the IContainer that contains the Component. (Inherited from Shape.) |
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ContainsFocus | Gets a value indicating whether a line or shape control currently has the input focus. (Inherited from Shape.) |
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ContextMenu | Gets or sets the shortcut menu associated with a line or shape control. (Inherited from Shape.) |
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ContextMenuStrip | Gets or sets the ContextMenuStrip associated with a line or shape control. (Inherited from Shape.) |
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Created | Gets a value indicating whether a line or shape control has been created. (Inherited from Shape.) |
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Cursor | Gets or sets the cursor that is displayed when the mouse pointer is resting on a line or shape control. (Inherited from Shape.) |
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DesignMode | Gets a value that indicates whether the Component is currently in design mode. (Inherited from Component.) |
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DisplayRectangle | Gets the rectangle that represents the display area of the shape. (Inherited from SimpleShape.) |
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Disposing | Gets a value indicating whether the base Shape class is disposing. (Inherited from Shape.) |
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Enabled | Gets or sets a value indicating whether a line or shape control can respond to user interaction. (Inherited from Shape.) |
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Events | Gets the list of event handlers that are attached to this Component. (Inherited from Component.) |
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FillColor | Gets or sets the color that is used to fill the shape. (Inherited from SimpleShape.) |
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FillGradientColor | Gets or sets the gradient color that is used to fill the shape. (Inherited from SimpleShape.) |
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FillGradientStyle | Gets or sets the gradient style that is used to fill the shape. (Inherited from SimpleShape.) |
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FillStyle | Gets or sets the pattern used to fill the shape. (Inherited from SimpleShape.) |
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Focused | Gets a value indicating whether a line or shape control currently has the input focus. (Inherited from Shape.) |
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Height | Gets or sets the height of the shape. (Inherited from SimpleShape.) |
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IsAccessible | Gets or sets a value indicating whether a line or shape control is available to accessibility applications. (Inherited from Shape.) |
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IsDisposed | Gets a value indicating whether a line or shape control has been disposed of. (Inherited from Shape.) |
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Left | Gets or sets the distance, in pixels, between the left edge of the shape and the left edge of its container's client area. (Inherited from SimpleShape.) |
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Location | Gets or sets the coordinates of the upper-left corner of the shape relative to the upper-left corner of its container. (Inherited from SimpleShape.) |
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Name | Gets or sets the name of a line or shape control. (Inherited from Shape.) |
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Parent | Gets or sets the parent container of a line or shape control. (Inherited from Shape.) |
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Region | Gets or sets the window region associated with a line or shape control. (Inherited from Shape.) |
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Right | Gets the distance, in pixels, between the right edge of the shape and the left edge of its container's client area. (Inherited from SimpleShape.) |
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SelectionColor | Gets or sets the selection color of a shape. (Inherited from Shape.) |
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Site | Gets or sets the ISite of the Component. (Inherited from Component.) |
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Size | Gets or sets the height and width of the shape. (Inherited from SimpleShape.) |
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Tag | Gets or sets the object that contains data about a line or shape control. (Inherited from Shape.) |
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Top | Gets or sets the distance, in pixels, between the top edge of the shape and the left edge of its container's client area. (Inherited from SimpleShape.) |
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UseWaitCursor | Gets or sets a value indicating whether to use the wait cursor for the current line or shape control. (Inherited from Shape.) |
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Visible | Gets or sets a value indicating whether a line or shape control is displayed. (Inherited from Shape.) |
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Width | Gets or sets the width of the shape. (Inherited from SimpleShape.) |
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Methods
| Name | Description | |
|---|---|---|
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BringToFront | Brings a line or shape control to the front of the z-order. (Inherited from Shape.) |
.gif "Protected method") |
CreateAccessibilityInstance | Creates a new accessibility object for the shape control. (Inherited from SimpleShape.) |
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CreateObjRef | Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (Inherited from MarshalByRefObject.) |
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Dispose() | Releases all resources used by the Component. (Inherited from Component.) |
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Dispose(Boolean) | Releases the unmanaged resources used by a line or shape control and optionally releases the managed resources. (Inherited from Shape.) |
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DrawToBitmap | Supports rendering to the specified bitmap. (Inherited from SimpleShape.) |
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Equals | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
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Finalize | Releases unmanaged resources and performs other cleanup operations before the Component is reclaimed by garbage collection. (Inherited from Component.) |
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FindForm | Retrieves the form that a line or shape control is on. (Inherited from Shape.) |
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Focus | Sets input focus to a line or shape control. (Inherited from Shape.) |
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GetContainerControl | Returns the next ContainerControl up in a line or shape control's chain of parent controls. (Inherited from Shape.) |
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GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
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GetLifetimeService | Retrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from MarshalByRefObject.) |
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GetService | Returns an object that represents a service provided by the Component or by its Container. (Inherited from Component.) |
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GetType | Gets the Type of the current instance. (Inherited from Object.) |
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Hide | Conceals a line or shape control from the user. (Inherited from Shape.) |
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HitTest | Determines whether a shape control is located at the specified point on the screen. (Inherited from SimpleShape.) |
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InitializeLifetimeService | Obtains a lifetime service object to control the lifetime policy for this instance. (Inherited from MarshalByRefObject.) |
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Invalidate | Invalidates a specific region of a line or shape control and causes a paint message to be sent to the control. (Inherited from Shape.) |
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MemberwiseClone() | Creates a shallow copy of the current Object. (Inherited from Object.) |
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MemberwiseClone(Boolean) | Creates a shallow copy of the current MarshalByRefObject object. (Inherited from MarshalByRefObject.) |
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OnBackColorChanged | Raises the BackColorChanged event. (Inherited from SimpleShape.) |
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OnBackgroundImageChanged | Raises the BackgroundImageChanged event. (Inherited from SimpleShape.) |
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OnBackgroundImageLayoutChanged | Raises the BackgroundImageLayoutChanged event. (Inherited from SimpleShape.) |
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OnClick | Raises the Click event. (Inherited from Shape.) |
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OnClientSizeChanged | Raises the ClientSizeChanged event. (Inherited from SimpleShape.) |
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OnContextMenuChanged | Raises the ContextMenuChanged event. (Inherited from Shape.) |
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OnContextMenuStripChanged | Raises the ContextMenuStripChanged event. (Inherited from Shape.) |
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OnCursorChanged | Raises the CursorChanged event. (Inherited from Shape.) |
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OnDoubleClick | Raises the DoubleClick event. (Inherited from Shape.) |
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OnEnabledChanged | Raises the EnabledChanged event. (Inherited from Shape.) |
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OnEnter | Raises the Enter event. (Inherited from Shape.) |
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OnGotFocus | Raises the GotFocus event. (Inherited from Shape.) |
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OnInvalidated | Raises the Invalidated event. (Inherited from Shape.) |
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OnKeyDown | Raises the KeyDown event. (Inherited from Shape.) |
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OnKeyPress | Raises the KeyPress event. (Inherited from Shape.) |
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OnKeyUp | Raises the KeyUp event. (Inherited from Shape.) |
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OnLeave | Raises the Leave event. (Inherited from Shape.) |
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OnLocationChanged | Raises the LocationChanged event. (Inherited from SimpleShape.) |
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OnLostFocus | Raises the LostFocus event. (Inherited from Shape.) |
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OnMouseClick | Raises the MouseClick event. (Inherited from Shape.) |
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OnMouseDoubleClick | Raises the MouseDoubleClick event. (Inherited from Shape.) |
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OnMouseDown | Raises the MouseDown event. (Inherited from Shape.) |
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OnMouseEnter | Raises the MouseEnter event. (Inherited from Shape.) |
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OnMouseHover | Raises the MouseHover event. (Inherited from Shape.) |
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OnMouseLeave | Raises the MouseLeave event. (Inherited from Shape.) |
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OnMouseMove | Raises the MouseMove event. (Inherited from Shape.) |
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OnMouseUp | Raises the MouseUp event. (Inherited from Shape.) |
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OnMouseWheel | Raises the MouseWheel event. (Inherited from Shape.) |
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OnMove | Raises the Move event. (Inherited from Shape.) |
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OnPaint | Raises the Paint event. (Inherited from SimpleShape.) |
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OnParentChanged | Raises the ParentChanged event. (Inherited from Shape.) |
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OnPreviewKeyDown | Raises the PreviewKeyDown event. (Inherited from Shape.) |
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OnQueryAccessibilityHelp | Raises the QueryAccessibilityHelp event. (Inherited from Shape.) |
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OnRegionChanged | Raises the RegionChanged event. (Inherited from Shape.) |
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OnResize | Raises the Resize event. (Inherited from SimpleShape.) |
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OnSizeChanged | Raises the SizeChanged event. (Inherited from SimpleShape.) |
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OnVisibleChanged | Raises the VisibleChanged event. (Inherited from Shape.) |
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PointToClient | Computes the location of the specified screen point into client coordinates. (Inherited from Shape.) |
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PointToScreen | Computes the location of the specified client point into screen coordinates. (Inherited from Shape.) |
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RectangleToClient | Computes the size and location of the specified screen rectangle in client coordinates. (Inherited from Shape.) |
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RectangleToScreen | Computes the size and location of the specified client rectangle in screen coordinates. (Inherited from Shape.) |
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Refresh | Forces a control to invalidate its client area and immediately redraw itself and any child controls. (Inherited from Shape.) |
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ResumePaint | Resumes usual painting logic, optionally forcing an immediate layout of pending paint requests. (Inherited from Shape.) |
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Scale | Scales the shape by the specified scaling factor. (Inherited from SimpleShape.) |
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Select | Enables a control. (Inherited from Shape.) |
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SendToBack | Sends a line or shape control to the back of the z-order. (Inherited from Shape.) |
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SetBounds | Sets the bounds of the shape to the specified location and size. (Inherited from SimpleShape.) |
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Show | Displays a shape to the user. (Inherited from Shape.) |
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SuspendPaint | Suspends the painting logic for a shape. (Inherited from Shape.) |
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ToString | Returns a String containing the name of the Component, if any. This method should not be overridden. (Inherited from Component.) |
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Update | Causes the control to redraw the invalidated regions within its client area. (Inherited from Shape.) |
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Events
| Name | Description | |
|---|---|---|
.gif "Public event") |
BackColorChanged | Occurs when the BackColor property of the shape is changed. (Inherited from SimpleShape.) |
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BackgroundImageChanged | Occurs when the BackgroundImage property of a shape is changed. (Inherited from SimpleShape.) |
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BackgroundImageLayoutChanged | Occurs when the BackgroundImageLayout property of a shape is changed. (Inherited from SimpleShape.) |
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ChangeUICues | Occurs when the focus or keyboard user interface (UI) cues change. (Inherited from Shape.) |
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Click | Occurs when the shape is clicked. (Inherited from Shape.) |
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ClientSizeChanged | Occurs when the ClientSize property of a shape is changed. (Inherited from SimpleShape.) |
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ContextMenuChanged | Occurs when the value of the ContextMenu property changes. (Inherited from Shape.) |
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ContextMenuStripChanged | Occurs when the value of the ContextMenuStrip property changes. (Inherited from Shape.) |
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CursorChanged | Occurs when the value of the Cursor property changes. (Inherited from Shape.) |
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Disposed | Occurs when the component is disposed by a call to the Dispose method. (Inherited from Component.) |
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DoubleClick | Occurs when the shape is double-clicked. (Inherited from Shape.) |
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EnabledChanged | Occurs when the Enabled property value has changed. (Inherited from Shape.) |
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Enter | Occurs when the shape is entered. (Inherited from Shape.) |
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GotFocus | Occurs when the shape receives focus. (Inherited from Shape.) |
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Invalidated | Occurs when a shape's display requires redrawing. (Inherited from Shape.) |
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KeyDown | Occurs when a key is pressed and the shape has focus. (Inherited from Shape.) |
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KeyPress | Occurs when a key is pressed and the shape has focus. (Inherited from Shape.) |
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KeyUp | Occurs when a key is released and the shape has focus. (Inherited from Shape.) |
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Leave | Occurs when the input focus leaves the shape. (Inherited from Shape.) |
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LocationChanged | Occurs when the Location property of a shape is changed. (Inherited from SimpleShape.) |
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LostFocus | Occurs when the shape loses focus. (Inherited from Shape.) |
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MouseClick | Occurs when the shape is clicked by the mouse. (Inherited from Shape.) |
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MouseDoubleClick | Occurs when the shape is double-clicked by the mouse. (Inherited from Shape.) |
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MouseDown | Occurs when the mouse pointer is over the shape and a mouse button is pressed. (Inherited from Shape.) |
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MouseEnter | Occurs when the mouse pointer enters the shape. (Inherited from Shape.) |
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MouseHover | Occurs when the mouse pointer rests on the shape. (Inherited from Shape.) |
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MouseLeave | Occurs when the mouse pointer leaves the shape. (Inherited from Shape.) |
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MouseMove | Occurs when the mouse pointer is moved over the shape. (Inherited from Shape.) |
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MouseUp | Occurs when the mouse pointer is over the shape and a mouse button is released. (Inherited from Shape.) |
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MouseWheel | Occurs when the mouse wheel moves and the shape has focus. (Inherited from Shape.) |
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Move | Occurs when the shape is moved. (Inherited from Shape.) |
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Paint | Occurs when the shape is redrawn. (Inherited from Shape.) |
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ParentChanged | Occurs when the Parent property value changes. (Inherited from Shape.) |
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PreviewKeyDown | Occurs before the KeyDown event when a key is pressed and focus is on the shape. (Inherited from Shape.) |
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QueryAccessibilityHelp | Occurs when an AccessibleObject is providing Help to accessibility applications. (Inherited from Shape.) |
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RegionChanged | Occurs when the value of the Region property changes. (Inherited from Shape.) |
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Resize | Occurs when the size of a shape is changed. (Inherited from SimpleShape.) |
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SizeChanged | Occurs when the Size property of a shape is changed. (Inherited from SimpleShape.) |
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VisibleChanged | Occurs when the Visible property value changes. (Inherited from Shape.) |
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Remarks
The OvalShape control enables you to draw circles and ovals on a form or container at design time or run time.
When you add a Line or Shape control to a form or container, an invisible ShapeContainer object is created. The ShapeContainer acts as a drawing surface for the shapes within each container control. Each ShapeContainer has a corresponding ShapeCollection that enables you to iterate through the Line and Shape controls that are contained in the ShapeContainer.
When you create an OvalShape control at run time, you must also create a ShapeContainer and set the Parent property of the OvalShape to the ShapeContainer.
Examples
The following example creates a ShapeContainer and an OvalShape, adds them to a form, and displays a circle.
Private Sub DrawCircle()
Dim canvas As New Microsoft.VisualBasic.PowerPacks.ShapeContainer
Dim oval1 As New Microsoft.VisualBasic.PowerPacks.OvalShape
' Set the form as the parent of the ShapeContainer.
canvas.Parent = Me
' Set the ShapeContainer as the parent of the OvalShape.
oval1.Parent = canvas
' Set the location and size of the circle.
oval1.Left = 10
oval1.Top = 10
oval1.Width = 100
oval1.Height = 100
End Sub
private void DrawCircle1()
{
Microsoft.VisualBasic.PowerPacks.ShapeContainer canvas =
new Microsoft.VisualBasic.PowerPacks.ShapeContainer();
Microsoft.VisualBasic.PowerPacks.OvalShape oval1 =
new Microsoft.VisualBasic.PowerPacks.OvalShape();
// Set the form as the parent of the ShapeContainer.
canvas.Parent = this;
// Set the ShapeContainer as the parent of the OvalShape.
oval1.Parent = canvas;
// Set the location and size of the circle.
oval1.Left = 10;
oval1.Top = 10;
oval1.Width = 100;
oval1.Height = 100;
}
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
See Also
Reference
Microsoft.VisualBasic.PowerPacks Namespace
Other Resources
Introduction to the Line and Shape Controls (Visual Studio)
How to: Draw Lines with the LineShape Control (Visual Studio)
How to: Draw Shapes with the OvalShape and RectangleShape Controls (Visual Studio)