The ImageBox component is used to load and display images.
To load an image do one of the following:
Double-click the component on a form in the form designer mode.
In the object inspector click the button of the Image.
Select Edit from the context menu of the component.
After this component image editor opens:
Clicking Load displays a standard dialog box where you can select a file to be displayed in the component. The list of available images includes files of the following formats: *.bmp;*.jpg;*.jpeg;*.jpe;*.jfif;*.gif;*.png;*.tif;*.tiff. If the selected image is larger than the editor's window, the image is automatically resized.
In the Fix Area group you can adjust settings of image areas that are not to be scaled when displayed. To do this, background image is divided into 9 parts:
When an image is drawn, the parts A, C, G, I are not resized. The B part and the H part can be resized only horizontally. The D part and the F part can be resized only vertically. The E part can be fully resized.
The Display Area checkbox controls displaying red lines separating fixed image area from scaled areas. Fixed areas are displayed in the same way as in the source file. The rest of the image area is scaled in accordance with size of the ImageBox component. The size of the fixed area is specified in pixels and depends on the size of the loaded image.
The Stretch Image checkbox enables a user to stretch loaded image to the whole area of the edit window.
Use the Save button to save image loaded into the component.
The following special class is implemented to configure background image with margins using the kernel GxRectangleTransformImage. Parameters of fixed margins are set in the Margins property.
| Property name | Brief description | |
| Align | The Align property determines the behavior of the component, when the size of its parent component is changed. | |
| AllowDrag | The AllowDrag property determines whether an object can be dragged from the component. | |
| AllowDrop | The AllowDrop property determines whether the component can accept a dragged object. | |
| Anchors | The Anchors property returns settings that determine the percentage of the size change for the current component when the parent component is resized. | |
| AutoSize | The AutoSize property determines, whether the size of component window is automatically selected to fit the image size. | |
| Brush | The Brush property specifies the brush used to fill the component area. | |
| Center | The Center property determines the position of the image in the component window. | |
| ClientHeight | The ClientHeight property is used to receive or specify the height of the component’s client space. | |
| ClientWidth | The ClientWidth property is used to receive or specify the width of the component’s client space. | |
| Color | The Color property determines the background color of a component. | |
| ComponentCount | The ComponentCount property returns the number of child components. | |
| Components | The Components property returns the child component. | |
| Cursor | The Cursor property determines the look of the cursor over the component. | |
| Data | The Data property is used to store any custom data. | |
| Enabled | The Enabled property determines whether the component is available for the user. | |
| Focused | The Focused property returns True, if the focus is set on the component. | |
| Font | The Font property determines the set of characteristics, describing the font, used to display text. | |
| Height | The Height property determines the component height. | |
| HelpContext | The HelpContext property determines a unique index for the context help section for this component. | |
| Hint | The Hint property determines the hint text for the component. | |
| Image | The Image property determines the image, displayed by the component. | |
| Left | The Left property determines the coordinate of the left border of the component. | |
| Name | The Name property determines the component name. | |
| Parent | The Parent property determines the parent component. | |
| ParentColor | The ParentColor property determines whether the component inherits the color of the parent component. | |
| ParentFont | The ParentFont property determines whether the component should use the font of the parent component. | |
| ParentShowHint | The ParentShowHint property determines when a tooltip is displayed. | |
| PopupMenu | The PopupMenu property determines the context menu to be displayed on right-click. | |
| Proportional | The Proportional property determines whether the image in the component window should retain proportions. | |
| Scrolls | The Scrolls property returns parameters of component's scrollbars. | |
| ShowHint | The ShowHint property enables and disables showing a hint for the component. | |
| Stretch | The Stretch property determines, whether the size of the image should be automatically changed to fit the component size. | |
| TabOrder | The TabOrder property determines the component position in the tab order. | |
| TabStop | The TabStop property determines whether the focus is set to a component when the TAB button is pressed. | |
| Tag | The Tag property is not used by the compiler. The user can change the value of the Tag property and use it as required. | |
| Text | The Text property determines the row identifying a component for user. | |
| Top | The Top property determines the coordinate of the top border of the component. | |
| Transparent | The Transparent property determines, whether the image background should be transparent. | |
| TransparentColor | The TransparentColor property determines the color for the image transparency. | |
| Visible | The Visible property determines the visibility of the component during execution. | |
| Width | The Width property determines the component width. |
| Method name | Brief description | |
| BringToFront | The BringToFront method brings a component to front. | |
| ClientToScreen | The ClientToScreen method converts point coordinates relative to component coordinates into display coordinates. | |
| DoDragDrop | The DoDragDrop method allows to start drag-and-drop operation. | |
| GetImage | The GetImage method returns the image of the component with all the child components. | |
| LoadImageFromStream | The LoadImageFromStream method loads images from stream. | |
| ScreenToClient | The ScreenToClient method converts screen coordinates of a point to coordinates specified relative to the component coordinate system. | |
| SendToBack | The SendToBack method sends a component to back. | |
| SetFocus | The SetFocus method sets focus to this component. |
| Event name | Brief description | |
| OnBeginDrag | The OnBeginDrag event occurs for a component, when a user starts to drag an object from the component. | |
| OnClick | The OnClick event occurs if a user clicks a component area using the main mouse button. | |
| OnDblClick | The OnDblClick event occurs if a user double-clicks a component area using the mouse button. | |
| OnDragDrop | The OnDragDrop event occurs for a component if a user drops a dragged object over it. | |
| OnDragEnter | The OnDragEnter event occurs when a dragged object crosses the borders of this component. | |
| OnDragLeave | The OnDragLeave event occurs when a dragged object leaves the borders of this component. | |
| OnDragOver | The OnDragOver event occurs for this component when a user drags a dragged object over it. | |
| OnEnter | The OnEnter event occurs when a component receives focus. | |
| OnExit | The OnExit event occurs when a component loses focus. | |
| OnHScroll | The OnHScroll event occurs when the horizontal scrollbar slider changes its position. | |
| OnKeyDown | The OnKeyDown event occurs if a component is focused and a keyboard key is pressed. | |
| OnKeyPress | The OnKeyPress event occurs if a component is focused when a user presses a character key. | |
| OnKeyPreview | The OnKeyPreview event occurs prior to each event requiring clicking. | |
| OnKeyUp | The OnKeyUp event occurs if a component is focused and a user releases any button previously pressed. | |
| OnMouseDown | The OnMouseDown event occurs when the pointer is in component area and a mouse button is pressed. | |
| OnMouseEnter | The OnMouseEnter event occurs when mouse cursor enters the component area. | |
| OnMouseHover | The OnMouseHover event occurs when mouse cursor is held in the component area. | |
| OnMouseLeave | The OnMouseLeave event occurs when mouse cursor leaves the component area. | |
| OnMouseMove | The OnMouseMove event occurs on moving the cursor over component. | |
| OnMouseUp | The OnMouseUp event occurs on releasing mouse button when the cursor is in component area. | |
| OnMouseWheel | The OnMouseWheel event occurs if the component has focus when the mouse wheel is rotated. | |
| OnVScroll | The OnVScroll event occurs when the vertical scrollbar slider changes its position. |
See also: