From 2fd976620e566321fd078aadf6d0951a1dc7777a Mon Sep 17 00:00:00 2001
From: Ansgar Becker <ansgarbecker@users.noreply.github.com>
Date: Thu, 24 Sep 2009 18:45:18 +0000
Subject: [PATCH] Enhance SynEdit's TSynHotKey: * Add events OnChange, OnEnter
 and OnExit * Use gray text when disabled

---
 components/synedit/Source/SynEditMiscClasses.pas | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/components/synedit/Source/SynEditMiscClasses.pas b/components/synedit/Source/SynEditMiscClasses.pas
index a26b97e2..2eb6a594 100644
--- a/components/synedit/Source/SynEditMiscClasses.pas
+++ b/components/synedit/Source/SynEditMiscClasses.pas
@@ -328,6 +328,9 @@ type
     FInvalidKeys: THKInvalidKeys;
     FModifiers: THKModifiers;
     FPressedOnlyModifiers: Boolean;
+    FOnChange: TNotifyEvent;
+    FOnEnter: TNotifyEvent;
+    FOnExit: TNotifyEvent;
     procedure SetBorderStyle(const Value: TSynBorderStyle);
     procedure SetHotKey(const Value: TShortCut);
     procedure SetInvalidKeys(const Value: THKInvalidKeys);
@@ -360,6 +363,9 @@ type
     property HotKey: TShortCut read FHotKey write SetHotKey default $0041; { Alt+A }
     property InvalidKeys: THKInvalidKeys read FInvalidKeys write SetInvalidKeys default [hcNone, hcShift];
     property Modifiers: THKModifiers read FModifiers write SetModifiers default [hkAlt];
+    property OnChange: TNotifyEvent read FOnChange write FOnChange;
+    property OnEnter: TNotifyEvent read FOnEnter write FOnEnter;
+    property OnExit: TNotifyEvent read FOnExit write FOnExit;
   end;
 
   TSynEditSearchCustom = class(TComponent)
@@ -1381,6 +1387,8 @@ begin
   end;
 
   Key := SavedKey;
+  if Assigned(FOnChange) then
+    FOnChange(Self);
 end;
 
 procedure TSynHotKey.KeyUp(var Key: Word; Shift: TShiftState);
@@ -1429,6 +1437,10 @@ begin
   Canvas.Brush.Color := Color;
   InflateRect(r, -BorderWidth, -BorderWidth);
   Canvas.FillRect(r);
+  if Enabled then
+    Canvas.Font.Color := clWindowText
+  else
+    Canvas.Font.Color := clGrayText;
   TextRect(Canvas, r, BorderWidth + 1, BorderWidth + 1, Text);
 end;
 
@@ -1493,6 +1505,8 @@ end;
 procedure TSynHotKey.WMKillFocus(var Msg: TWMKillFocus);
 begin
   DestroyCaret;
+  if Assigned(FOnExit) then
+    FOnExit(Self);
 end;
 
 procedure TSynHotKey.WMSetFocus(var Msg: TWMSetFocus);
@@ -1501,6 +1515,8 @@ begin
   CreateCaret(Handle, 0, 1, -Canvas.Font.Height + 2);
   SetCaretPos(BorderWidth + 1 + TextWidth(Canvas, Text), BorderWidth + 1);
   ShowCaret(Handle);
+  if Assigned(FOnEnter) then
+    FOnEnter(Self);
 end;
 {$ENDIF}