Unidata IDV Workshop for version 6.1u1 > Starting the IDV/GUI Basics > IDV Basic Concepts

(More Info) . We'll go through some simple exercises here to get you used to these functions.

1. Zooming
   • Zoom in to a portion of the display using the rubber band feature of the IDV. Hold the Shift key down on the keyboard. In the View Window, click the left mouse button (MB1) and drag the mouse to create a box that covers the region you want to zoom to, and then release the mouse button.
   • To restore the display to the full projection, press the Ctrl and r keys simultaneously (Ctrl-r).
   • You can also zoom by holding the Shift key and the right mouse button (MB3) down and move the mouse forward and back. Try zooming this way.
   • Restore the display to its original position with Ctrl-r
   • You can also zoom by holding the Shift key and pressing the up (zoom in) and down (zoom out) arrows on the keyboard. You have to click in the window first. Try zooming this way.
   • Restore the display to its original position.
   • Finally, if you have a mouse with a scroll wheel, you can zoom out by rolling the wheel forward and zoom in by scrolling the wheel toward you (e.g. bring the view closer). When you are done, restore the display to its original position.
2. Panning
   • You can pan the display by holding the Ctrl key and the right mouse button (MB3) down and move the mouse around. The display will pan in the direction of the mouse movement. Try this.
   • Restore the display to its original position.
   • You can also pan the display by holding the Ctrl key and pressing the arrow keys on the keyboard. Using this method, the display will pan in the direction of the arrow. Try it out. You have to click in the window first.
   • Restore the display to its original position.
3. Rotating
   • The main view window is configured as a 3-D display. You can rotate the 3-D view by holding down the right mouse button (MB3) and moving the mouse. Try rotating the display using this method. It takes some getting used to.
   • Restore the display to its original position.
   • You can also rotate the display using the arrow keys on the keyboard. Click in the window and then try using the arrow keys to rotate the 3-D box.
   • Restore the display to its original position.
   • Finally, if you have a scroll wheel on your mouse, can use this to rotate the display. Holding down the Ctrl key while scrolling will rotate along the Y axis of the display; holding the Shift key will rotate about the X axis. Holding the Shift+Ctrl keys at the same time will rotate about the Z axis.` the keyboard. Click in the window and then try using the arrow keys to rotate the 3-D box.
4. Pulling it all together

   Try different combinations of zooming, panning and rotating. When you are finished, restore the display to its original position.

5. Moving Selector Points
   • Some displays have selector points that can be manipulated interactively to change their position.
   • In the sample data display, move the cursor over the endpoint of the red cross section line, click the left mouse button and drag the mouse to move the point.
   • Rotate the display to see the change in the cross section in the main view window
6. You can change the default behavior through the Navigation tab of the User Preferences accessed by the Edit→Preferences menu.

 

Unidata IDV Workshop for version 6.1u1 > Starting the IDV/GUI Basics > IDV Basic Concepts