Hi, After considering the discussion of first post, I come up with the second draft for new menu interface implementation.
First, the basic drawing unit is now region, there are four types: text Single line of text, have alignment attribute. image An image, have scaling and alignment attribute. rect A rectangle area filled with background color. viewport A viewport in the container box. This is used for strolling. The whole ui are composed of the above regions, components add their drawing regions to a global tree which handles region updates for them. One of the shortcoming of Colin's graphic patch is that the update process is not optimized. The screen flickers a lot without double buffer. Double buffer eats up a lot of memory, which is a problem in platforms like OpenFirmware. And even with double buffer, the redrawing process takes time and response is quite slow. The new menu interface split ui into small regions which uses different update strategy, and redraw only the necessary regions. Component is the basic unit for interaction. Each component has a flag that indicate if it can receive input focus. The last component with input focus will be the current input, you can use a hotkey like ctrl-tab to switch to other component. Some of the components: label Text label, it consist of text region. image Image, it consist of image region. frame Window frame. This is normally used by other component to draw the border, it consist of multiple image and/or rect region. panel Layout manager. It can have a scrollbar when the actual content is bigger than the window size. it consist of viewport region. text Multi-line text box. It has a frame and a text box in the center. edit Single line edit box. It has a frame and an edit box in the center. Has input focus. menu Menu box. It has a frame, a panel for layout control, and multiple menu items. Has input focus. term Terminal emulator. It has a frame and a two dimension edit box in the center. Has input focus. --- Bean gitgrub home: http://github.com/grub/grub/ my fork page: http://github.com/bean123/grub/ _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org http://lists.gnu.org/mailman/listinfo/grub-devel
