[Overview][Types][Classes][Procedures and functions][Index] |
[Properties (by Name)] [Methods (by Name)] [Events (by Name)]
TCustomImage - the base type for TImage.
Source position: extctrls.pp line 503
type TCustomImage = class(TGraphicControl) |
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protected |
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class procedure WSRegisterClass; override; |
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Registers the class with the widgetset. |
procedure PictureChanged(); virtual; |
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Performs actions needed when the Picture property has been changed. |
procedure CalculatePreferredSize(); override; |
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Override this method to return the preferred height and width for the control. |
class function GetControlClassDefaultSize; override; |
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Returns the default size for this class of controls (when added to a form). |
procedure Paint; override; |
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Draws the image to the control canvas. |
public |
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constructor Create(); override; |
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Constructor for the class instance. |
destructor Destroy; override; |
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Destructor for the class instance. |
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A clipped window into the parent Canvas. |
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function DestRect; virtual; |
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Gets the rectangle where the image is painted. |
procedure Invalidate; override; |
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Causes the control to be repainted. |
property AntialiasingMode: TAntialiasingMode; [rw] |
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Indicates if anti-aliasing is used when rendering the image. |
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Specifies the placement of the control inside its Parent. |
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property AutoSize: Boolean; |
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Allows automatic adjustment of the size for the control, according to its content. |
property Center: Boolean; [rw] |
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Indicates if the image should be centered. |
property KeepOriginXWhenClipped: Boolean; [rw] |
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Preserves the Left coordinate when a clipped image is centered. |
property KeepOriginYWhenClipped: Boolean; [rw] |
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Preserves the Top coordinate when a clipped image is centered. |
property Constraints: TSizeConstraints; |
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The minimum and maximum Width and Height for the control. |
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Contains the image displayed in the control. |
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property Visible: Boolean; |
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Allows the control, and all of its children, to be displayed or hidden. |
property OnClick: TNotifyEvent; |
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Notification handler for mouse clicks. |
property OnMouseDown: TMouseEvent; |
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Event handler for mouse button going down. |
property OnMouseEnter: TNotifyEvent; |
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Event handler for mouse entering the area of the control. |
property OnMouseLeave: TNotifyEvent; |
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Event handler for mouse leaving the area of the control. |
property OnMouseMove: TMouseMoveEvent; |
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Event handler for mouse movement within the control. |
property OnMouseUp: TMouseEvent; |
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Event handler for mouse button going up. |
property OnMouseWheel: TMouseWheelEvent; |
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Event handler for mouse wheel turned. |
property OnMouseWheelDown: TMouseWheelUpDownEvent; |
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Event handler for downward movement of mouse wheel. |
property OnMouseWheelUp: TMouseWheelUpDownEvent; |
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Event handler for upward movement of the mouse wheel. |
property Stretch: Boolean; [rw] |
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Indicates if the image is resized to the client area for the control. |
property StretchOutEnabled: Boolean; [rw] |
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Allows the image to be resized proportionally when the image drawing area is resized. |
property StretchInEnabled: Boolean; [rw] |
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Allows the image to be resized proportionally when the image drawing area is resized. |
property Transparent: Boolean; [rw] |
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Indicates if the image has a clear, non-opaque background. |
property Proportional: Boolean; [rw] |
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True if image is proportional. |
property OnPictureChanged: TNotifyEvent; [rw] |
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Event handler signalled when Picture is changed. |
property OnPaintBackground: TImagePaintBackgroundEvent; [rw] |
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Event handler signalled to draw the background for the image. |
end; |
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TCustomImage - the base type for TImage. |
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TGraphicControl is the base class for all lightweight controls. |
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The base class for visible controls. |
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The base class for LCL components which have an associated widget. |
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TComponent |
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TObject |
TCustomImageis the base type for TImage. This is a control descended from TGraphicControl, and is designed to be lightweight and fast.
TCustomImage provides a Canvas that is used to render the bitmap graphic in its Picture property. Additional properties are provided to control how the image is rendered, and includes: AntialiasingMode, Stretch, Transparent, and Proportional.
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TGraphicControl is the base class for all lightweight controls. |
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