TGIS_ControlScale class

Visual control for displaying the current map scale for an attached TGIS_ViewerWnd.

Available also on: Delphi FMX | .NET WinForms | Java | ActiveX | Python.

Syntax

// Delphi
type
  [ComponentPlatformsAttribute(pfidWindows)]
  TGIS_ControlScale = class( TCustomPanel, IGIS_Subscribe, IGIS_PrintableControl )
  end;

// C++ Builder
class PASCALIMPLEMENTATION TGIS_ControlScale : public TCustomPanel
{
};

Inheritance

→ TCustomPanel

Implements

IGIS_Subscribe IGIS_PrintableControl

Constructors

Inherited Overrides Protected

	Name	Visibility	Description
	Create	public	Create the map scale control.
	Destroy	public	Destroy the control.

Methods

Inherited Overrides Protected

Name	Visibility	Description
CreateCopy	public	Prepare a copy of the control for printing. _{(Implements IGIS_PrintableControl.CreateCopy)}
Draw	public	Draw the current map scale.
DrawBmp(TBitmap; Double; Integer)	public	Draw the control on a provided VCL bitmap.
DrawBmp(TGIS_Bitmap; Double; Integer)	public	Draw the control on a provided GIS bitmap.
FreeCopy	public	Release a copy of the control. _{(Implements IGIS_PrintableControl.FreeCopy)}
Invalidate	public	Invalidates control.
Paint	protected	Paint the control.
PrintBmp	public	Print the control on the given bitmap. _{(Implements IGIS_PrintableControl.PrintBmp)}
PrintClipboard	public	Copy the control rendering to the clipboard.
PrintPdf	public	Print the control on the given PDF context. _{(Implements IGIS_PrintableControl.PrintPdf)}
SubscribedEvent	public	Subscriber notification event. _{(Implements IGIS_Subscribe.SubscribedEvent)}
Update	public	Update the control.

Properties

Inherited Protected

Name	Visibility	Description
Align	published	Standard VCL property.
Anchors	published	Standard VCL property.
BevelInner	published	Standard VCL property.
BevelOuter	published	Standard VCL property.
BevelWidth	published	Standard VCL property.
Bitmap	public	Bitmap. Valid only if control was created by Create with a parameter.
BorderStyle	published	Standard VCL property.
Color	published	Standard VCL property.
Ctl3D	published	Standard VCL property.
DividerColor1	published	Color of the first divider.
DividerColor2	published	Color of the second divider.
Dividers	published	Number of dividers.
DragCursor	published	Standard VCL property.
DragKind	published	Standard VCL property.
DragMode	published	Standard VCL property.
Enabled	published	Standard VCL property.
Font	published	Standard VCL property.
FullRepaint	published	Standard VCL property.
GIS_Bitmap	public	Bitmap. Valid only if control was created by Create with a parameter.
GIS_Viewer	published	Attached map viewer used to calculate and display the scale.
Glow	published	Draw a glowing shadow around the scale bar and labels.
HelpContext	published	Standard VCL property.
Hint	published	Standard VCL property.
InternalName	public	Used internally by TatukGIS. _{(Implements IGIS_PrintableControl.InternalName)}
ParentColor	published	Standard VCL property.
ParentCtl3D	published	Standard VCL property.
ParentFont	published	Standard VCL property.
ParentShowHint	published	Standard VCL property.
PopupMenu	published	Standard VCL property.
ShowHint	published	Standard VCL property.
TabOrder	published	Standard VCL property.
TabStop	published	Standard VCL property.
Touch	published	Standard VCL property.
Transparent	published	If True then control will be drawn as transparent.
Units	public	Units used for scale output.
UnitsEPSG	published	EPSG (European Petroleum Survey Group) code for scale output units.
Visible	published	Control visibility.

Events

Inherited Protected

Name	Visibility	Description
OnCanResize	published	Standard VCL event.
OnClick	published	Standard VCL event.
OnContextPopup	published	Standard VCL event.
OnDblClick	published	Standard VCL event.
OnDragDrop	published	Standard VCL event.
OnDragOver	published	Standard VCL event.
OnEndDrag	published	Standard VCL event.
OnEnter	published	Standard VCL event.
OnExit	published	Standard VCL event.
OnGesture	published	Standard VCL event.
OnKeyDown	published	Standard VCL event.
OnKeyPress	published	Standard VCL event.
OnKeyUp	published	Standard VCL event.
OnMouseDown	published	Standard VCL event.
OnMouseMove	published	Standard VCL event.
OnMouseUp	published	Standard VCL event.
OnMouseWheel	published	Standard VCL event.
OnMouseWheelDown	published	Standard VCL event.
OnMouseWheelUp	published	Standard VCL event.
OnResize	published	Standard VCL event.
OnStartDrag	published	Standard VCL event.
PrepareEvent	published	Fired before the control prepares the scale measurement.

Remarks

PURPOSE: Displays a scale bar that reflects the current map view and distance units reported by the connected viewer.

BEHAVIOR: Scale computation depends on TGIS_Viewer.CS units settings. The control refreshes in response to viewer updates and can render with dividers, custom colors, glow, and transparent paint.

USAGE: Place this component on a form and connect GIS_Viewer to TGIS_ViewerWnd.

CONSTRAINTS: GIS_Viewer should reference a valid TGIS_ViewerWnd instance for scale calculation and repaint updates.

TatukGIS Developer Kernel

Table of Contents

TGIS_ControlScale class

Syntax

Inheritance

Implements

Constructors

Methods

Properties

Events

Remarks

TatukGIS Developer Kernel

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Table of Contents

TGIS_ControlScale class

Syntax

Inheritance

Implements

Constructors

Methods

Properties

Events

Remarks

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