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The DWG Viewer reads all drawings from the Support folder of the IPA. This may result in a slower opening and rendering time. It is recommended to load drawings from a local or external folder of the device. The drawing is loaded with the _OPEN command using the -(void)runCommand:(NSString*)command method of the singleton [CFxARESInstance instance]. Once the drawing is loaded the CFxAresDelegate triggers -(void)documentCreated and the CFxARESDocumentView can become visible. This is the time when additional user interfaces can show up or drawing content can be accessed. In general, the CFxAresDelegate informs the host application about all important drawing events.
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The active drawing is closed with the _CLOSE command. When the document is closed the CFxARESDelegate triggers -(void)documentDestroyed , the drawing is removed from the memory and the CFxARESDocumentView can become hidden. The host application can set up the user interface for a new drawing like switching between state view controllers.
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It is not necessary to implement viewing gestures. The framework comes with a set of basic finger gestures to change the active view of the drawing. It supports zooming in and out but has to know if it runs in Pan or Orbit mode. The viewing mode can be switched with a Diesel expression that can be executed with the -(void)runCommand:(NSString*)command method of the singleton [CFxARESInstance instance].
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Hint: You can achieve similar results with commands like _ZOOM or _PAN.
DWG Viewer - Change layout background color
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