FAQ

Please move the code for SceneControl and Scene to the windowOpened method of JFrame, or the code after it. The handle of the JFrame window can be get only after it is displayed, and the operations of SceneControl and Scene need this handle.

Please check that whether you change the ImageSize property value of map or the size of the mapcontrol after transferring the ViewEntire() method. If you need viewentire the map after change the size ,you should transfer the ViewEntire() method again.

Please check the ID of the filling marker in the Style of the selection. 1 means no filling, 0 means filling.

If you want to draw temporary object, please set the TrackMode attribute in MapControl first.

Please check whether it is started like thispublic static void main(String[] args) {SwingUtilities.invokeLater(new Runnable() {public void run() {// The classes and methods to implement}} );}

Objects Java use millimeter as unit, while Deskpro takes the unit of 0.1 millimeter.

When you use the data from the SDB datasource for making the 3D thematic map, you must call the method, Layer3DDataset.updateData() of this thematic map layer after adding it to the scene; otherwise the thematic map layer cannot display.

When you use the dataset in the datasource whose engine type is Oracle, SQL or DB2 to make the unique map, if you use the relational expression such as "SmID>100" as the field expression, the operation will fail and return null. Therefore the field expression should be the field name or the arithmetic expression such as "SmID" and "SmID + 1 ".

When the MapControl object doesn't display, you had better not evoke the methods which begin with Do such as DoMouseDown; otherwise it may crash.

By default, the isTextOrientationFixed() method of Map class returns true, which indicates some texts are unable to be displayed on a map. when the Label map and Graph map are displayed simultaneously, or multi-layers exist in the same map, the display effect of the map depends on the sequence of layers added to the map. If the setTextOverlapAvoided(boolean value) method is set to false, the overlapped texts can be displayed.

The origin of the map coordinate system is at the left bottom, and the positive direction of X and Y is rightward and upward respectively. The origin of the screen coordinate system is at the top left, and the positive direction of X and Y is rightward and downward respectively.

Yes, it needs to be. You can first close map or MapControl, and then close the Workspace.

Yes, it has to be connected with Workspace using the method of setWorkspace(Workspace) before using MapControl to display data.

When the Recordset is a part object in a function and it's no longer used, you have to call the method of Dispose to release it.

Put libstdc++.so.6 from suppourt folder into Bin floder

Current system lacks of libpng12 library, please install corresponding libpng 12 library to solve this problem. You can install the library with installation disc or /support/ rmp to install. Suse system installs by yum install libpng12-0-1.2.44-7.1.x86_64.rpm, Redhat or CentOS installs by yum install libpng-1.2.10-17.el5_8.x86_64.rpm. Other Linux systems are similiar

Delete same content in the registry, search the product name (SuperMap Object Java 6R, for example) in HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Unintall and delete the key values.

The install directory can not include bracket, otherwise the program will not read data successfully.

The relative path in the Supermap.xml file means the relative path to the folder which contains the executable file.

Please note that if your operating system is Windows Vista or Windows 7, you need to run SuperMap License Manager as administrator or turn off UAC before license configuration.