api:dk11:delphi:gisviewer.tgis_viewer
Table of Contents
TGIS_Viewer class
DK for Delphi | GisViewer.TGIS_Viewer | Classes | Constructors | Fields | Methods | Properties | Events
Generic map viewer implementation intended to be used through descendants such as TGIS_ViewerWnd and TGIS_ViewerBmp rather than directly.
Syntax
// Delphi type TGIS_Viewer = class( TGIS_UncountedInterfacedObject, IGIS_Viewer ) end;
// C++ Builder class PASCALIMPLEMENTATION TGIS_Viewer : public TGIS_UncountedInterfacedObject { };
Inheritance
Implements
Constructors
Inherited
Overrides
Protected
Private
| Name | Visibility | Description | |
|---|---|---|---|
| Create | public | Create a viewer instance. | |
Fields
Inherited
Protected
Private
| Name | Visibility | Description | |
|---|---|---|---|
| asapInterrupted | protected | Indicates that processing should be interrupted as soon as possible. | |
| bPaintTexture | protected | True if the current paint mode prepares a 3D texture. | |
| bUpgradable | protected | Indicates whether the current project can be upgraded to a newer version. | |
| bUponOpen | protected | Indicates that Open is in progress to avoid blocking layer additions because of the busy state. | |
| FOnAfterProjectOpen | protected | After-project-open event fired after TGIS_Viewer.Open completes. | |
| FOnBusy | protected | Busy event fired regularly during long-running operations. | |
| FOnExtentChange | protected | ExtentChange event fired when TGIS_Viewer.Extent changes. | |
| FOnHelp | protected | Help event handler used to provide context-sensitive viewer help. | |
| FOnLayerAdd | protected | LayerAdd event fired when a layer is added to the viewer, after it is created but before it is opened. | |
| FOnLayerDelete | protected | LayerDelete event fired when a layer is deleted from the viewer, just before the layer is destroyed. | |
| FOnPaintException | protected | Paint exception event fired when an exception occurs during painting. | |
| FOnPassword | protected | Fired when opening a layer to resolve user name and password. | |
| FOnProjectClose | protected | Project close event fired when TGIS_Viewer.Close is called. | |
| FOnProjectOpen | protected | Project open event fired when TGIS_Viewer.Open is called. | |
| FOnVisibleExtentChange | protected | VisibleExtentChange event fired when TGIS_Viewer.VisibleExtent changes. | |
| FOnZoomChange | protected | ZoomChange event fired when TGIS_Viewer.Zoom changes. | |
| hourglassInterrupted | protected | Indicates whether the current hourglass operation was interrupted. | |
| hourglassInterval | protected | Interval threshold used by hourglass update logic. | |
| hourglassProgressive | protected | Progressive threshold used by hourglass update logic. | |
| hourglassState | protected | Hourglass state nesting level. | |
| hourglassVisible | protected | Indicates whether the hourglass cursor is currently visible. | |
| iLastHash | protected | Hash of the last opened project state. | |
| iUponSave | protected | Saved save nesting level used to avoid recursive save operations. | |
| lastPaint | protected | Viewer state snapshot after the last paint operation, including zoom and visible extent. | |
| lstSubscribers | protected | List of registered viewer notification subscribers. | |
| oldColor | protected | Screen color saved so it can be restored after project changes. | |
| oldProperties | protected | Saved viewer property values used to restore state on Close. | |
| originalViewport | protected | Saved OriginalViewport property value. | |
| rotateCos | protected | Cosine of the current rotation angle, cached for rotation calculations. | |
| rotateSin | protected | Sine of the current rotation angle, cached for rotation calculations. | |
| unrotateCos | protected | Cosine of the inverse rotation angle, cached for unrotation calculations. | |
| unrotateSin | protected | Sine of the inverse rotation angle, cached for unrotation calculations. | |
Methods
Inherited
Overrides
Protected
Private
| Name | Visibility | Description | |
|---|---|---|---|
| Add | public | Add a layer to the Viewer. (Implements IGIS_Viewer.Add) |
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| AddHierarchy | public | Read hierarchy information and build hierarchy groups with layers. (Implements IGIS_Viewer.AddHierarchy) |
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| AddProxy | public | ||
| AssignedBusyEvent | public | Reference to a busy event handler assigned to the Viewer. (Implements IGIS_Viewer.AssignedBusyEvent) |
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| AssignedHelpEvent | public | Reference to a help event handler assigned to the Viewer. (Implements IGIS_Viewer.AssignedHelpEvent) |
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| AttachLayer | public | Attach layer to the viewer by re-parenting. (Implements IGIS_Viewer.AttachLayer) |
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| BeginPaintInternal | public | Notify the viewer that painting is starting. (Implements IGIS_Viewer.BeginPaintInternal) |
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| BusyPrepare | public | Prepare BusyEvent for a long-running operation. (Implements IGIS_Viewer.BusyPrepare) |
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| BusyRelease | public | Release the busy state. (Implements IGIS_Viewer.BusyRelease) |
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| BusyShake | public | Update the busy state. (Implements IGIS_Viewer.BusyShake) |
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| CenterViewport | public | Sets the viewport so that _ptg becomes visible at the center of the screen. (Implements IGIS_Viewer.CenterViewport) |
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| ChangeHash | public | Change hash used to verify whether the layer order, parameters, or related viewer state has been modified. (Implements IGIS_Viewer.ChangeHash) |
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| Close | public | Close the current project. (Implements IGIS_Viewer.Close) |
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| Delete | public | Delete the layer identified by a name. (Implements IGIS_Viewer.Delete) |
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| doCreate | protected | Perform internal viewer initialization for the constructor. | |
| Draw | public | Draw all layers on the current renderer. (Implements IGIS_Viewer.Draw) |
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| EndPaintInternal | public | Notify the viewer that painting has finished. (Implements IGIS_Viewer.EndPaintInternal) |
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| FullExtent | public | Calculate the screen origin, zoom, and viewport to place the whole map in the window. (Implements IGIS_Viewer.FullExtent) |
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| FullExtentZoom | public | Calculates the zoom that fits the whole map inside the window. (Implements IGIS_Viewer.FullExtentZoom) |
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| Get | public | Retrieve the layer identified by name. (Implements IGIS_Viewer.Get) |
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| GetGrid | public | Fill the provided _grid array with values for _extent. (Implements IGIS_Viewer.GetGrid) |
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| GetRenderContext | public | Returns the current rendering context object. (Implements IGIS_Viewer.GetRenderContext) |
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| HourglassActive | public | Test whether the hourglass is active. (Implements IGIS_Viewer.HourglassActive) |
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| HourglassPrepare | public | Prepare the hourglass cursor for a long operation. (Implements IGIS_Viewer.HourglassPrepare) |
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| HourglassRelease | public | Release the hourglass state. (Implements IGIS_Viewer.HourglassRelease) |
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| HourglassRestart | public | Restart hourglass timing used for progressive updates. (Implements IGIS_Viewer.HourglassRestart) |
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| HourglassShake | public | Refresh the hourglass state. (Implements IGIS_Viewer.HourglassShake) |
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| Interrupt | public | Request interruption of a long-running operation as soon as possible. (Implements IGIS_Viewer.Interrupt) |
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| Interrupted | public | Test whether a pending operation must be aborted. (Implements IGIS_Viewer.Interrupted) |
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| InvalidateBasemap | public | Invalidate only basemap layers. (Implements IGIS_Viewer.InvalidateBasemap) |
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| InvalidateEditor | public | Invalidate the editor to mark the viewer for redraw after an editor change. (Implements IGIS_Viewer.InvalidateEditor) |
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| InvalidateExtent(TGIS_Extent) | public | Invalidate an extent for a full map redraw. (Implements IGIS_Viewer.InvalidateExtent) |
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| InvalidateExtent(TGIS_Extent; Boolean) | public | Invalidate an extent. (Implements IGIS_Viewer.InvalidateExtent) |
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| InvalidateSelection | public | Invalidate the selection to mark the viewer for redraw after a selection change. (Implements IGIS_Viewer.InvalidateSelection) |
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| InvalidateTopmost | public | Invalidate only topmost layers. (Implements IGIS_Viewer.InvalidateTopmost) |
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| InvalidateWholeMap | public | Invalidate whole map. (Implements IGIS_Viewer.InvalidateWholeMap) |
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| Locate(TGIS_Point; Double) | public | Locates the shape nearest to _ptg that is within _prec. (Implements IGIS_Viewer.Locate) |
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| Locate(TGIS_Point; Double; Boolean) | public | Locates the shape nearest to _ptg that is within _prec. (Implements IGIS_Viewer.Locate) |
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| Locate(TPoint; Integer) | public | Locates the shape nearest to _pt that is within _prec. (Implements IGIS_Viewer.Locate) |
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| LocateEx | public | Locates shapes on layers near _ptg and returns the best candidate from each layer that is within _prec. (Implements IGIS_Viewer.LocateEx) |
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| Lock | public | Lock the viewer. (Implements IGIS_Viewer.Lock) |
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| MapToScreen | public | Converts point coordinates from map coordinates to screen coordinates. (Implements IGIS_Viewer.MapToScreen) |
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| MapToScreen3D | public | Converts 3D point coordinates from map coordinates to screen coordinates. (Implements IGIS_Viewer.MapToScreen3D) |
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| MapToScreenEx | public | Converts point coordinates from map coordinates to screen coordinates, returning the result as TGIS_Point. (Implements IGIS_Viewer.MapToScreenEx) |
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| MapToScreenRect | public | Converts rectangle coordinates from map coordinates to screen coordinates. (Implements IGIS_Viewer.MapToScreenRect) |
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| MarkModified | public | Mark viewer upon some modifications. (Implements IGIS_Viewer.MarkModified) |
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| MoveViewport | public | Moves the map viewport by delta values in screen coordinates. (Implements IGIS_Viewer.MoveViewport) |
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| MoveViewportEx | public | Moves the map viewport by delta values in map coordinates. (Implements IGIS_Viewer.MoveViewportEx) |
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| MustSave | public | Check if any layer or the project file was modified by editing. (Implements IGIS_Viewer.MustSave) |
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| NotifyPaintException | public | Transform an exception into a TGIS_Viewer.OnPaintException event. (Implements IGIS_Viewer.NotifyPaintException) |
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| NotifySubscribers | public | Send a notification to subscribed controls. (Implements IGIS_Viewer.NotifySubscribers) |
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| Open(String) | public | Open a project. (Implements IGIS_Viewer.Open) |
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| Open(String; Boolean) | public | Open a project. (Implements IGIS_Viewer.Open) |
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| OpenAsync(String; Boolean; TGIS_AsyncCallback) | public | Open a project asynchronously. (Implements IGIS_Viewer.OpenAsync) |
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| OpenAsync(String; TGIS_AsyncCallback) | public | Open a project asynchronously. (Implements IGIS_Viewer.OpenAsync) |
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| OpenEx(TGIS_ConfigAbstract; String) | public | Open a project file from memory. (Implements IGIS_Viewer.OpenEx) |
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| OpenEx(TGIS_ConfigAbstract; String; Boolean) | public | Open a project file from memory. (Implements IGIS_Viewer.OpenEx) |
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| OpenExAsync(TGIS_ConfigAbstract; String; Boolean; TGIS_AsyncCallback) | public | Open a project file from memory asynchronously. (Implements IGIS_Viewer.OpenExAsync) |
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| OpenExAsync(TGIS_ConfigAbstract; String; TGIS_AsyncCallback) | public | Open a project file from memory asynchronously. (Implements IGIS_Viewer.OpenExAsync) |
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| PixelsToTwips | public | Converts a size from device-dependent pixels to device-independent twips (1/1440 inch) to keep the map device independent. (Implements IGIS_Viewer.PixelsToTwips) |
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| PrintPdf(String) | public | Prints the current extent to PDF using the default page size. (Implements IGIS_Viewer.PrintPdf) |
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| PrintPdf(String; Single; Single) | public | Prints the current extent to PDF. (Implements IGIS_Viewer.PrintPdf) |
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| PrintPdf(TStream) | public | Prints the current extent to PDF using the default page size. (Implements IGIS_Viewer.PrintPdf) |
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| PrintPdf(TStream; Single; Single) | public | Prints the current extent to PDF. (Implements IGIS_Viewer.PrintPdf) |
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| PrintSvg(String) | public | Prints the current extent to SVG (Scalable Vector Graphics) using the parent view box size and parent PPI. (Implements IGIS_Viewer.PrintSvg) |
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| PrintSvg(String; Single; Single; Integer) | public | Prints the current extent to SVG (Scalable Vector Graphics). (Implements IGIS_Viewer.PrintSvg) |
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| PrintSvg(TStream) | public | Prints the current extent to SVG (Scalable Vector Graphics) using the parent view box size and parent PPI. (Implements IGIS_Viewer.PrintSvg) |
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| PrintSvg(TStream; Single; Single; Integer) | public | Prints the current extent to SVG (Scalable Vector Graphics). (Implements IGIS_Viewer.PrintSvg) |
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| RaiseBusyEvent | public | Fire the viewer busy event. (Implements IGIS_Viewer.RaiseBusyEvent) |
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| RaiseHelpEvent | public | Fire the viewer help event. (Implements IGIS_Viewer.RaiseHelpEvent) |
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| ReadConfig | public | Read all configuration data from the project. (Implements IGIS_Viewer.ReadConfig) |
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| RecalcExtent | public | Calculates a common extent. (Implements IGIS_Viewer.RecalcExtent) |
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| ReParent | public | Set a new parent for the viewer. (Implements IGIS_Viewer.ReParent) |
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| ReParentLock | public | Block reparenting. (Implements IGIS_Viewer.ReParentLock) |
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| ReParentUnlock | public | Unblock reparenting. (Implements IGIS_Viewer.ReParentUnlock) |
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| Reposition | public | Reposition the map within the component window. (Implements IGIS_Viewer.Reposition) |
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| RereadConfig | public | Reread all configuration data from the project and layer configuration files. (Implements IGIS_Viewer.RereadConfig) |
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| ResetPPI | public | Reset cached PPI values so viewer PPI can be recalculated. | |
| RestorePaintState | public | Restore and free the current paint state. (Implements IGIS_Viewer.RestorePaintState) |
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| RevertAll | public | Revert all layers to a file-based original. (Implements IGIS_Viewer.RevertAll) |
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| RotatedExtent | public | Computes the extent that encompasses an extent after viewer rotation. (Implements IGIS_Viewer.RotatedExtent) |
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| RotatedPoint | public | Computes the position of a point after viewer rotation. (Implements IGIS_Viewer.RotatedPoint) |
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| RotatedPoint3D | public | Computes the position of a 3D point after viewer rotation. (Implements IGIS_Viewer.RotatedPoint3D) |
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| RotatedPoint3D_ref | public | Computes the position of the 3D point after viewer rotation. (Implements IGIS_Viewer.RotatedPoint3D_ref) |
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| SaveAll | public | Save all layers (parameters and data) (Implements IGIS_Viewer.SaveAll) |
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| SaveData | public | Save all changes to the data. (Implements IGIS_Viewer.SaveData) |
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| SaveProject | public | Save the current project. (Implements IGIS_Viewer.SaveProject) |
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| SaveProject(Boolean) | public | Save the current project. (Implements IGIS_Viewer.SaveProject) |
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| SaveProjectAs(String) | public | Save the current project under a new name. (Implements IGIS_Viewer.SaveProjectAs) |
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| SaveProjectAs(String; Boolean) | public | Save the current project under a new name. (Implements IGIS_Viewer.SaveProjectAs) |
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| SaveProjectAsEx(TGIS_ConfigAbstract; String) | public | Save the current project under a new name. (Implements IGIS_Viewer.SaveProjectAsEx) |
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| SaveProjectAsEx(TGIS_ConfigAbstract; String; Boolean) | public | Save the current project under a new name. (Implements IGIS_Viewer.SaveProjectAsEx) |
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| ScreenToMap | public | Converts point coordinates from screen coordinates to map coordinates. (Implements IGIS_Viewer.ScreenToMap) |
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| ScreenToMap3D | public | Converts point coordinates from screen coordinates to map coordinates. (Implements IGIS_Viewer.ScreenToMap3D) |
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| ScreenToMapEx | public | Converts point coordinates from screen coordinates to map coordinates, using TGIS_Point as the source type. (Implements IGIS_Viewer.ScreenToMapEx) |
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| ScreenToMapRect(Integer; Integer; Integer; Integer) | public | ||
| ScreenToMapRect(TRect) | public | Converts rectangle coordinates from screen coordinates to map coordinates. (Implements IGIS_Viewer.ScreenToMapRect) |
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| SetCSByEPSG | public | Sets the coordinate system from an EPSG (European Petroleum Survey Group) code. (Implements IGIS_Viewer.SetCSByEPSG) |
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| SetCSByWKT | public | Sets the coordinate system from a WKT (Well-Known Text) string containing a GEOGCS or PROJCS definition. (Implements IGIS_Viewer.SetCSByWKT) |
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| SetCSByWKTFile | public | Sets the coordinate system from a file containing a WKT (Well-Known Text) string with a GEOGCS or PROJCS definition. (Implements IGIS_Viewer.SetCSByWKTFile) |
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| SetViewport | public | Sets the viewport origin to a given position in map coordinates. (Implements IGIS_Viewer.SetViewport) |
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| StorePaintState | public | Store the current paint state. (Implements IGIS_Viewer.StorePaintState) |
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| Subscribe | public | Add provided control to the notification subscription list. (Implements IGIS_Viewer.Subscribe) |
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| SynchronizePaint | public | Wait for a pending paint operation to finish. (Implements IGIS_Viewer.SynchronizePaint) |
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| TwipsToPixels | public | Converts a size from device-independent twips (1/1440 inch) to device-dependent pixels to keep the map device independent. (Implements IGIS_Viewer.TwipsToPixels) |
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| TwipsToPoints | public | Converts a size from device-independent twips (1/1440 inch) to device points for advanced font sizing. (Implements IGIS_Viewer.TwipsToPoints) |
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| Unlock | public | Unlock the viewer and redraw it. (Implements IGIS_Viewer.Unlock) |
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| Unlock(Boolean) | public | Unlock the viewer and optionally redraw it. (Implements IGIS_Viewer.Unlock) |
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| UnrotatedExtent | public | Computes the original extent of a rotated extent. (Implements IGIS_Viewer.UnrotatedExtent) |
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| UnrotatedPoint | public | Computes the original position of a rotated point. (Implements IGIS_Viewer.UnrotatedPoint) |
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| UnrotatedPoint3D | public | Computes the original position of a rotated 3D point. (Implements IGIS_Viewer.UnrotatedPoint3D) |
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| UnrotatedPoint3D_ref | public | Computes the original position of a rotated 3D point. (Implements IGIS_Viewer.UnrotatedPoint3D_ref) |
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| UnSubscribe | public | Remove provided control from the notification subscription list. (Implements IGIS_Viewer.UnSubscribe) |
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| WaitForBackgroundProcesses | public | Waits for any pending background processes that must finish before the application can continue. (Implements IGIS_Viewer.WaitForBackgroundProcesses) |
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| WaitForNotBusy | public | Calls _proc when the viewer fully finishes the painting process. (Implements IGIS_Viewer.WaitForNotBusy) |
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| WriteConfig | public | Write all configuration data to the project or layer INI file. (Implements IGIS_Viewer.WriteConfig) |
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Properties
Inherited
Protected
Private
| Name | Visibility | Description | |
|---|---|---|---|
| AutoStyle | published | If True, layers added to the viewer will have a unique style applied. (Implements IGIS_Viewer.AutoStyle) |
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| BigExtent | public | Map extent encompassing the collective extents of all layers and a border defined by BigExtentMargin. (Implements IGIS_Viewer.BigExtent) |
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| BigExtentMargin | published | Map extent margin. (Implements IGIS_Viewer.BigExtentMargin) |
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| BusyLevel | public | Level of current busy state. (Implements IGIS_Viewer.BusyLevel) |
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| BusyText | public | Text related to the current busy state. (Implements IGIS_Viewer.BusyText) |
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| Center | public | Center the screen based on given point. (Implements IGIS_Viewer.Center) |
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| CenterPtg | public | Point on which the viewer will be centered during zoom. (Implements IGIS_Viewer.CenterPtg) |
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| Color | published | Background color. (Implements IGIS_Viewer.Color) |
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| Copyright | public | Legal notice and product version. (Implements IGIS_Viewer.Copyright) |
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| CS | public | Coordinate system assigned to the viewer. (Implements IGIS_Viewer.CS) |
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| CustomData | published | List of custom user-defined data saved to and restored from config/project files. (Implements IGIS_Viewer.CustomData) |
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| CustomPPI | published | Custom resolution in pixels-per-inch. (Implements IGIS_Viewer.CustomPPI) |
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| DelayedUpdate | public | Delayed update threshold in milliseconds. (Implements IGIS_Viewer.DelayedUpdate) |
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| Editor | public | Editor context. (Implements IGIS_Viewer.Editor) |
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| Extent | public | Map extent encompassing the collective extents of all layers. (Implements IGIS_Viewer.Extent) |
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| FileCopyrights | public | List of copyrights. (Implements IGIS_Viewer.FileCopyrights) |
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| FontScale | published | Font magnifying factor in percents. (Implements IGIS_Viewer.FontScale) |
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| FullDrawExtent | public | Extent of the full current or last drawing area, including margin and without tiling. (Implements IGIS_Viewer.FullDrawExtent) |
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| Hierarchy | public | Hierarchy list. (Implements IGIS_Viewer.Hierarchy) |
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| IncrementalPaint | published | Is partial drawing to screen done in incremental mode? (Implements IGIS_Viewer.IncrementalPaint) |
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| InPaint | public | True if the viewer is busy in the Paint procedure. (Implements IGIS_Viewer.InPaint) |
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| IsBusy | public | Indicates whether the viewer is currently painting. (Implements IGIS_Viewer.IsBusy) |
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| IsEmpty | public | True if the viewer is empty and contains no layers. (Implements IGIS_Viewer.IsEmpty) |
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| IsLocked | public | True if the viewer is in the locked state. (Implements IGIS_Viewer.IsLocked) |
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| IsTopmost | public | True if Viewer has a topmost layer. (Implements IGIS_Viewer.IsTopmost) |
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| Items | public | All layers. (Implements IGIS_Viewer.Items) |
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| KeepScale | published | True if a viewer should maintain scale upon resize. (Implements IGIS_Viewer.KeepScale) |
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| LabelsReg | public | Labels position allocator object. (Implements IGIS_Viewer.LabelsReg) |
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| Level | public | Sets and gets the zoom level for the viewer. (Implements IGIS_Viewer.Level) |
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| MasterViewer | public | Reference to the master viewer used by tiled painting. (Implements IGIS_Viewer.MasterViewer) |
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| MultiUserMode | published | Multi-user mode. (Implements IGIS_Viewer.MultiUserMode) |
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| OverlappedExtentMargin | public | Overlapped extent margin in pixels. (Implements IGIS_Viewer.OverlappedExtentMargin) |
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| Parent | public | Parent viewer. | |
| PPI | public | Rendering resolution in pixels per inch. (Implements IGIS_Viewer.PPI) |
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| ProgressiveUpdate | public | Progressive update threshold in milliseconds. (Implements IGIS_Viewer.ProgressiveUpdate) |
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| ProjectFile | public | Project file itself as opened in Open procedure. (Implements IGIS_Viewer.ProjectFile) |
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| ProjectName | public | Project file name as opened in Open procedure. (Implements IGIS_Viewer.ProjectName) |
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| RestrictedDrag | published | If True, dragging outside the map extent is not allowed. (Implements IGIS_Viewer.RestrictedDrag) |
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| RestrictedExtent | public | Restricted map extent. (Implements IGIS_Viewer.RestrictedExtent) |
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| RotationAngle | public | Angle of viewer rotation in radians. (Implements IGIS_Viewer.RotationAngle) |
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| RotationPoint | public | Point of viewer rotation in map units. (Implements IGIS_Viewer.RotationPoint) |
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| Scale | public | Sets and gets the scale factor. (Implements IGIS_Viewer.Scale) |
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| ScaleAsFloat | public | Sets and gets the scale factor. (Implements IGIS_Viewer.ScaleAsFloat) |
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| ScaleAsText | public | Sets and gets the scale factor as text in the format '1:10000'. (Implements IGIS_Viewer.ScaleAsText) |
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| SelectionGisColor | published | Color used to highlight selected objects. (Implements IGIS_Viewer.SelectionGisColor) |
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| SelectionOutlineOnly | published | If True, polygons are marked only with an outline and not filled. (Implements IGIS_Viewer.SelectionOutlineOnly) |
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| SelectionTransparency | published | Transparency value for selection. (Implements IGIS_Viewer.SelectionTransparency) |
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| SelectionWidth | published | Outline width of selection area (>0 in twips, <0 in pixels). (Implements IGIS_Viewer.SelectionWidth) |
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| SystemPPI | public | System resolution in pixels per inch. (Implements IGIS_Viewer.SystemPPI) |
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| TemporaryScaleInternal | public | Used to force rendering at a scale different from the actual scale. (Implements IGIS_Viewer.TemporaryScaleInternal) |
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| TemporaryVisibleExtent | public | Used to force label rendering while drawing with tiles. (Implements IGIS_Viewer.TemporaryVisibleExtent) |
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| TiledPaint | published | True if partial drawing to the screen is done in tiled mode. (Implements IGIS_Viewer.TiledPaint) |
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| UponDestroy | public | True if the viewer is being destroyed, so some operations such as screen updates should not be performed. (Implements IGIS_Viewer.UponDestroy) |
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| UseAnimations | published | True if zoom animations are allowed. (Implements IGIS_Viewer.UseAnimations) |
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| UseRTree | published | True if an RTree spatial index will be used by default when a layer is created. (Implements IGIS_Viewer.UseRTree) |
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| ViewerParent | public | Parent for the current IGIS_Viewer object. (Implements IGIS_Viewer.ViewerParent) |
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| ViewerParentRoot | public | Root parent for the current IGIS_Viewer object. (Implements IGIS_Viewer.ViewerParentRoot) |
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| Viewport | public | Sets and gets the upper-left corner position of the component window within the map. (Implements IGIS_Viewer.Viewport) |
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| VisibleExtent | public | Extent of the map visible in the window. (Implements IGIS_Viewer.VisibleExtent) |
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| Zoom | public | Sets and gets the relative zoom factor. (Implements IGIS_Viewer.Zoom) |
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| ZoomEx | public | Sets and gets the absolute zoom factor. (Implements IGIS_Viewer.ZoomEx) |
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Events
Inherited
Protected
Private
| Name | Visibility | Description | |
|---|---|---|---|
| AfterProjectOpenEvent | published | AfterProjectOpen event. | |
| BusyEvent | published | Busy event handler. | |
| EditorPointChangeEvent | published | EditorPointChangeEvent event. | |
| EditorPointMoveEvent | published | EditorPointMoveEvent event. | |
| EditorSnapPointEvent | published | EditorSnapPoint event. | |
| ExtentChangeEvent | published | ExtentChanged event. | |
| HelpEvent | published | Help event. | |
| LayerAddEvent | published | LayerAdd event. | |
| LayerDeleteEvent | published | LayerDelete event. | |
| PaintExceptionEvent | published | PaintException event. | |
| PasswordEvent | published | Password event. | |
| ProjectCloseEvent | published | ProjectClose event. | |
| ProjectOpenEvent | published | ProjectOpen event. | |
| VisibleExtentChangeEvent | published | VisibleExtentChange event. | |
| ZoomChangeEvent | published | ZoomChange event. | |
Remarks
Available metadata keys:
| Metadata | Values | Default | Description |
|---|---|---|---|
| TGIS_Viewer.UpgradeProject | TRUE FALSE | TRUE | If true, then the old ttkgp project (ini) will be upgraded to the new ttkproject format (xml) |
| TGIS_Viewer.ScaleAtCsOrigin | TRUE FALSE | FALSE | If true, the scale is at the coordinate system origin (normally is calculated at the viewer center) |
References
2026/08/30 02:10