TsgCGMImage

Unit: CGM

Description

The main TsgCGMImage class is a descendant of TsgCADImage (which is a descendant of TGraphic) and overrides its methods. You can use the TsgCGMImage objects in the TImage control for displaying and navigation CGM format files.

Syntax

TsgCGMImage = class(TsgCADImage)

Properties

Properties	Description
Error	The property defines if the call of the procedure LoadFromStream was successful.
FileName	The property gets and sets the name of the file from which the image is loaded.
IsBinary	The property defines the file format.

Properties derived from TsgCADImage	Description
BackgroundColor	The property specifies the background color of the drawing which TsgCADImage displays.
Blocks	The property lists the blocks references of the drawing.
BorderSize	The property specifies the size of the drawing’s border in global points or ratio.
BorderType	The property sets the type of drawing’s border.
CachingRasterMode	The property specifies the size of drawing’s border in global points or ratio.
CBFormat	The property displays predefined clipboard format.
ColorToLineWeight	The property specifies the line weight for entities by colors.
Converter	The property contains information about the loaded CAD file.
CurrentLayout	The property sets the current layout.
DefaultColor	The property sets the color for elements which have white color in AutoCAD™ DXF/DWG
DimensionsVisible	The property switches on or off dimension of the drawing.
DrawingBox	The property defines drawing box.
DrawMatrix	The property gets the matrix used for drawing.
DrawMode	The property specifies the current color mode.
Entities	The property lists all the entities of the CAD file.
Extents	The property defines drawing's extents.
IsDraw3DAxes	The property gets and sets 3Daxes drawing mode.
IsDrawingRotated	The property defines if the drawing is rotated.
IsLoading	The property defines if the drawing is loading.
IsPlotting	The property defines the destination source status.
IsProcessMessages	The property defines the messages processing mode.
IsShowBackground	The property can be used to show background.
IsShowLineWeight	The property can be used to draw all entities with NullWidth pixel lineweights.
IsWithoutBorder	The property can be used to draw the drawing without adding the empty space (borders).
Layouts	The property gets the indexed layout.
LayoutsCount	The property gets the number of layouts.
LineWeightScale	The property gets and sets the line weight scale.
Millimeters	The property can be used to change the drawing units (millimeters/inches)
NullWidth	The property specifies the default line weight of entities with zero lineweight.
OwnSource	The property indicates if data is loaded.
PureExtents	The property defines the exact image field in world coordinates, with no empty space added.
ResizeDisproportionateDrawing	The property points to layer, containing given primitive if this layer is given.
Scale	The property returns scale factor of the image as TFPoint structure.
ShowImages	The property gets and sets the raster image drawing mode.
Stretch	The property indicates whether the CAD drawing should be changed so that it exactly fits the bounds of the image control.
TextVisible	The property switches on or off texts of the CAD image.
TTFMode	The property specifies the mode of the TTF fonts reflection.
UseWinEllipse	The property can be used for drawing most of the arcs and circles in the image using GDI Windows functions such as Ellipse, Arc, etc., not linearized.
ViewRectangle	For CAD Import VCL internal uses only.

Methods

Methods	Description
Create	Creates and initializes a new TsgCGMImage object.
Destroy	Destroys an instance of the TsgCGMImage class.
LoadFromStream	The method loads a CAD image from stream.
StopLoading	The method stops loading the file and displays only the loaded data.

Methods derived from TsgCADImage	Description
AbsHeight	The method returns the entire height of the CAD image.
AbsWidth	The method returns the entire width of the CAD image.
AddScaledDXF	The method adds a new drawing to the TsgCADImage object.
AddScaledDXFEx	The method adds a new drawing to the TsgCADImage object.
Assign	The method copies a CAD image object and increase reference to the Converter object.
CommonToInternalUnits	The method converts CAD coordinates of an image to the coordinates of the inner drawing's coordinate system.
DrawRect	The method renders a part of a loaded drawing on a device context specified by DC.
ExportToMetafile	The method exports a CAD drawing to a Windows Enhanced metafile
GetCADCoords	The method returns coordinates of a point on a drawing.
GetEntityColor	The method returns the entity's color.
GetExtents	The method recalculates the drawing extents.
GetObjectSnapMask	The method returns the object snap mode.
GetPoint	The method converts point from the 3D coordinate system to the 2D coordinate system.
GetPointUCS	The method converts the UCS coordinates to the screen coordinates.
GetRealImagePoint	The method the real coordinates of the point.
GetSnapData	The method returns the data structure that contains the closest entity to the argument point, and the node point.
GetVisibleArea	The method returns the visible area.
InternalToCommonUnits	The method converts the coordinates of the inner drawing's coordinate system to the CAD coordinates of an image.
LoadFromClipboardFormat	The method loads from clipboard.
LoadFromFile	The method loads a CAD image from file.
Measurement	The method returns the information about measurement system for linear and angular measures.
RefreshCurrentLayout	The method refreshes sizes of the current layout.
ResetDrawingBox	The method switches off the drawing box.
Rotate	The method rotates the current image.
RotDefault	The method rotates the image to the default view.
RotToView	The method rotates the image by parameter defined in A3DView.
SaveToClipboardFormat	The method saves to clipboard.
SaveToFile	The method saves the image to the file.
SaveToStream	The method saves the image to the stream.
SetObjectSnapMask	The method sets the object snap mode.
SetVisibleArea	The method sets an area for snap.

Events

Events derived from TsgCADImage	Description
OnAfterRotate	The event occurs after a CAD image being rotated.
OnBeforeRotate	The event occurs before a CAD image being rotated.
OnLayoutChange	The event occurs when a current layout is being changed.

Variables and constants

Variables and constants	Description
CF_CGM	Predefined clipboard format for use in the LoadFromClipboardFormat method.
SCGMImage	Predefined clipboard format for use in the LoadFromClipboardFormat method.