Recipe: Creating a Pull Control
Imagine a cord at the top of your screen. Pull it hard enough, and it rings a bell or otherwise triggers some sort of event, via a control target-action mechanism. For example, it could roll out a secondary view, start a download, or begin video playback. Recipe 2-8 builds a control that resembles a ribbon. The control updates clients when the interaction, which must start on top of the “ribbon,” pulls down far enough to trigger a request. The ribbon winds itself back up afterward, preparing for the next interaction.
Figure 2-7 shows the control built by this recipe, which is attached in this case to the bottom of a secondary view. Tugs bring the view into place and return it offscreen when finished.
Figure 2-7 ...
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