[Lazarus] Hooking Synedit's cut and copy shortcuts

[Martin]

On 22/12/2012 17:04, Mark Morgan Lloyd wrote:
> Martin wrote:
>> On 21/12/2012 19:54, Mark Morgan Lloyd wrote:
>>> I'm in the middle of adding a shared clipboard to a text editor 
>>> based on (Lazarus's) SynEdit. This is a simple stopgap based on a 
>>> backend database, but also allows me to exercise PostgreSQL's 
>>> listen/notify and hopefully also the Firebird equivalent both of 
>>> which I want for something else.
>>>
>>> What I've got works fine if I use a menu entry to do copy or cut, 
>>> but is there a simple way to hook SynEdit's reaction to ^C and ^X so 
>>> that I can transfer stuff to the backend automatically?
>>>
>> OnProcessCommand

this is during keyboard processing too.

SynEdit will have translated it int ecCopy

>>
>> (if not that then OnProcessUserCommand  commands are splitted into 
>> build in and user. ecCopy ecCut ecPaste should be build in)
>>
>> The above only works if lynedit handles the keyboard.
>>
>> If you call SynEdit.CopyToClipboard (TAction might do that?) then the 
>> above does not trigger
>>
>>
>>
>> use
>>
>>     property OnCutCopy: TSynCopyPasteEvent read FOnCutCopy write 
>> FOnCutCopy;
>>     property OnPaste: TSynCopyPasteEvent read FOnPaste write FOnPaste;
>
> Thanks Martin, noted. As an interim measure I ended up detecting ^C 
> etc. in the key-up event, which /might/ be safer since I'm already 
> filtering keys to implement an APL-style keyboard and /might/ be the 
> only way to handle
IIRC SynEdit handles ctrl-c in keydown

You can prevent SynEdit from handling the keystroke, by removing it from 
SynEdit,KeyStrokes (or similar)