C# Class SANTA.UI.ZPImageBox

A zoom-able, pan-able image box for displaying and navigating around images.

Inheritance: System.Windows.Forms.ScrollableControl

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Protected Properties

Property	Type	Description
_dragging	bool
_image	Image
_imageFocus	Point
_mode	Mode
_multipleFiles	bool
_zoom	float
grabCursor	System.Windows.Forms.Cursor
grabbingCursor	System.Windows.Forms.Cursor

Public Methods

Method	Description
SetImage ( Bitmap image ) : void	Change the currently displayed image.
SetImage ( Bitmap image, bool reset ) : void	Change the currently displayed image
SetMultipleFileMode ( bool multipleFiles ) : void	Change if multiple files are selected or not. Multiple images cannot be displayed if this is set to true.
ZPImageBox ( ) : System	Construct a `ZPImageBox`

Protected Methods

Method	Description
Box2ImageCoord ( Point boxCoord ) : Point	Convert a point from mouse coordinates to image coordinates.
Near ( Point a, Point b, float dist ) : bool	Determine if two points are within a certain distance of each other.
ResetImage ( bool moveToBoxCenter ) : void	Change the zoom level so the image is entirely viewable.

Private Methods

Method	Description
DrawImage ( object sender, PaintEventArgs e ) : void	Paint the image to the box.
SetEventHandlers ( ) : void
ZPImageBox_KeyDown ( object sender, KeyEventArgs e ) : void	If the Control key was pressed, put the image into Manipulate mode.
ZPImageBox_KeyUp ( object sender, KeyEventArgs e ) : void	If the Control key was released, put the image into Navigate mode.
ZPImageBox_MouseDown ( object sender, MouseEventArgs e ) : void	Handle navigation interaction
ZPImageBox_MouseEnter ( object sender, EventArgs e ) : void	This needs to grab focus when the mouse enters so that input can be handled.
ZPImageBox_MouseMove ( object sender, MouseEventArgs e ) : void	Move the image around.
ZPImageBox_MouseUp ( object sender, MouseEventArgs e ) : void	Disable dragging mode.
ZPImageBox_MouseWheel ( object sender, MouseEventArgs e ) : void	Zoom in or out of the image.

Method Details

Box2ImageCoord() protected method

Convert a point from mouse coordinates to image coordinates.

protected Box2ImageCoord ( Point boxCoord ) : Point
boxCoord	Point	Coordinate in the box's coordinate system.
return	Point

Near() protected static method

Determine if two points are within a certain distance of each other.

protected static Near ( Point a, Point b, float dist ) : bool
a	Point	First point.
b	Point	Second Point.
dist	float	The
return	bool

ResetImage() protected method

Change the zoom level so the image is entirely viewable.

protected ResetImage ( bool moveToBoxCenter ) : void
moveToBoxCenter	bool	Should the image be moved back to the center of the box
return	void

SetImage() public method

Change the currently displayed image.

public SetImage ( Bitmap image ) : void
image	System.Drawing.Bitmap	The new image to display.
return	void

SetImage() public method

Change the currently displayed image

public SetImage ( Bitmap image, bool reset ) : void
image	System.Drawing.Bitmap	The new image to display
reset	bool	Whether to reset the zoom level and focal point
return	void

SetMultipleFileMode() public method

Change if multiple files are selected or not. Multiple images cannot be displayed if this is set to true.

public SetMultipleFileMode ( bool multipleFiles ) : void
multipleFiles	bool	Are multiple files selected
return	void

ZPImageBox() public method

Construct a ZPImageBox

public ZPImageBox ( ) : System
return	System

Property Details

_dragging protected_oe property

Is the _image being dragged/moved around.

protected bool _dragging
return	bool

_image protected_oe property

Image to display

protected Image _image
return	Image

_imageFocus protected_oe property

_imageFocus is the point in the image's coordinate system that corresponds to the _boxFocus, which is the point in the ZPImageBox coordinate system where the user last clicked when moving the image.

protected Point _imageFocus
return	Point

_mode protected_oe property

The current method of interaction with the ZPImageBox.

protected Mode _mode
return	Mode

_multipleFiles protected_oe property

Have multiple files been selected.

protected bool _multipleFiles
return	bool

_zoom protected_oe property

These specify the range of scaling factors for the image.

protected float _zoom
return	float

grabCursor protected_oe static_oe property

Cursor to use when the mouse button is depressed. It looks like an opened hand.

protected static Cursor,System.Windows.Forms grabCursor
return	System.Windows.Forms.Cursor

grabbingCursor protected_oe static_oe property

Cursor to use when the mouse button is not depressed. It looks like a hand grabbing.

protected static Cursor,System.Windows.Forms grabbingCursor
return	System.Windows.Forms.Cursor