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3.4.1.1 Dragged Zoom

Figure 3.12: Zoom-plus cursor that indicates the left mouse clicking is ready for zooming in.
Image ZoomPlusUpLeft25

Dragged zoom is active only when the left mouse click is in zoom mode, i.e. when the the magnifying glass button is pressed in the toggled buttons as in Figure 3.10. In zoom mode, the cursor within the canvas will appear like a magnifying glass with plus sign in the center as in Figure 3.12. It is called zoom-plus cursor. The dragged zoom operation is initialized by pressing the left mouse button at the beginning of the zoom-in region, a white line will then appear. As soon as dragging is detected, another white line will appear to mark the current ending of the zoom-in region. The region that is marked by pair of white lines is lightly shaded as shown in Figure 2.4. The process can be canceled anytime by hitting the ESC key during dragging. Once the left mouse button is released, zooming will be carried out and the Timeline window will then be updated as in Figure 2.5. The time display panel is updated with the latest time related information of the zoom-in region. Notice that the zooming as well as scrolling can be achieved by explicitly editing the text fields in the time display panel.


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Next: 3.4.1.2 Instant Zoom Up: 3.4.1 Zoomable and Scrollable Previous: 3.4.1 Zoomable and Scrollable   Contents