Question

How can I translate a string to Virtkey ?

Asked by: Brainwashed2

Hi, I am searching for a solution to convert a string to Virtkey like:

 Var
   a : TVirtkey;
begin
  a := VKY;
  AddHotKey(a, [hkCtrl,hkAlt]);  //  or - I know - simplier:  AddHotKey(VKY, [hkCtrl,hkAlt]);  
end;

Is there some stuff, to realize code like:

Var
  a : String;
begin
    a := 'VK'+'Edit1.Text';
   AddHotKey(a, [hkCtrl,hkAlt]);  
end;

perhaps a funktion like StrToVirt( ) ???


Thanks

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Asked On
2005-07-20 at 09:34:33ID21498399
Tags

string

,

virtkey

Topic

Delphi Programming

Participating Experts
3
Points
400
Comments
5

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Answers

 

by: RadikalQ3Posted on 2005-07-20 at 10:27:15ID: 14487092

Use
 VKCode:=VkKeyScan(Ch:char);

 

by: RadikalQ3Posted on 2005-07-20 at 10:29:18ID: 14487124

example:
  a:=VkKeyScan('x');

More help in your win32.hlp file at your hard disk :)

 

by: pcsentinelPosted on 2005-07-20 at 10:35:32ID: 14487213

Virtual Key Codes are just constants

i.e. VK_DELETE = 46

 these are listed in windows.pas

so you would need to copy these defs to a another unit that included those defs again and did the conversion


so something like this untested code

function GetHotKey(KeyStr: string): integer;
begin
   if KeyStr='DELETE' then
     Result:=VK_DELETE
   else if KeyStr='INSERT' then
     Result:=VK_INSERT
   else if etc.etc.etc.

end;




 

by: ErikPhilipsPosted on 2005-09-04 at 16:51:45ID: 14820882

I'm not sure where your string is coming from, but you may want to consider using the HotKeys from ComCtrls.  This will give you a tShortCut valid for any shortcut you want.  Using the HotKeys control gives you access to an always valid key combination (maybe except for the key 'none') so you don't have to worry about parsing a string that may or may not be valid.  Once you have your tShortcut you can use any of these functions: (with Menus in your uses list).  The examples below will be all using the shortcut Ctrl+S

function shortCutToText(shortcut: tShortCut) : string
myShortCutText := shortCutToText(myShortCut);
(creates the text "Ctrl+S" from the shortCut value (type word));

function shortCut(key: Word; shift: tShiftState): tShortCut;  where key is a valid VK_KEY
myShortCut := shortCut(ord('s'), [ssCtrl])
(create a shortcut from a key (ord('s')) and shift [ssCtrl]

procedure shortCutToKey(shortCut: tShortCut; var key: Word; var shift: TShiftState);
key would become the VK of 's' and shift will contain [ssCtrl];

lastly there is:

function TextToShortCut(Text: string): TShortCut;
'Ctrl+S' returns the tShortCut word value;  This function is slow, so I don't recommend using it.


If you are required to go from "Text" to "Virtual Keys", you could use TextToShortCut, then shortCutToKey.

 

by: RadikalQ3Posted on 2005-09-05 at 01:54:02ID: 14822299

:?

20120131-EE-VQP-002

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