Difference between revisions of "New LCL shortcut system"
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Revision as of 00:17, 24 December 2010
This page collects ideas about improving system of shortcuts in LCL.
Current state
TShortCut = Low(Word)..High(Word); // in classes.pp unit // virtual key codes VK_* Key := ShortCut and $FF; // key modifiers Meta := ShortCut and $1000; // scMeta Shift := ShortCut and $2000; // scShift Control := ShortCut and $4000; // scControl Alt := ShortCut and $8000; // scAlt
Unused bits in TShortCut: $0F00
Requirements
- backward compatibility
- accept current TShortCut format
- new format can use only unused bits in current TShortCut format
- secondary, ternary shortcuts
- platform-specific shortcuts (E.g. Ctrl+C under Windows, Cmd + C under Mac OS X)
- shortcuts also with characters (E.g. Cmd + ?)
Conclusion
- create list of extra shortcut data under TApplication (TLCLShortCutList)
- the TShortCut value would be "an index" to one item in this list, unused bits can distinguish different shortcuts with same key code (0 will be reserved for old version)
- modify shortcut handling in TApplication, TForm, TAction and TMenuItem
- check for character shortcuts in IntfUTF8KeyPress
- add functions like ShortCutToText to TApplication
- modify TShortCut component editor
TLCLShortCut class
- index - TShortCut with modified unused bits
- priority list of TLCLShortCutItem
- key modifiers
- platform modifiers
- key or UTF-8 character