公布Delphi热键注册源码
1 {-------------------------------------------------------------------------------
2 热键注册
3 作者: 张金利 日期: 2010.08.12
4 说明:
5 -------------------------------------------------------------------------------}
6 unit Utility.HotKeys;
7
8 interface
9 uses
10 Windows,Messages,Classes,SysUtils;
11 Type
12 {热键事件}
13 THotKeyEvent = procedure(const Shift,Key:Cardinal) of object;
14 {一个热键}
15 THotKey = record
16 Shift:Cardinal;
17 Key:Cardinal;
18 Event:THotKeyEvent;
19 end;
20 {已注册的热键}
21 TRegisteredHotKey = record
22 Atom:Word;
23 HotKey:THotKey;
24 Registered:Boolean;
25 end;
26
27 {热键}
28 THotKeys = class
29 private
30 {接收句柄}
31 FHotKeyHandle:THandle;
32 FAtom:string;
33 FHotKeys:array of TRegisteredHotKey;
34 {空热键}
35 function IsEmptyHotKey(const HotKey:THotKey):Boolean;
36 {取消注册}
37 procedure UnRegisterHotKeys;
38 {取得热键}
39 function GetHotKeys(const Index:Integer):THotKey;
40 {注册的数量}
41 function GetCount:Integer;
42 {两个热键相同}
43 function SameHotKey(const HotKeyA,HotKeyB:THotKey):Boolean;
44 {热键事件}
45 function GetHotKeyEvent(const HotKey:THotKey):THotKeyEvent;
46 {热键消息捕捉过程}
47 procedure HotKeyHooks(var Message: TMessage);message WM_HOTKEY;
48 public
49 constructor Create(const Atom:string);
50 destructor Destroy;override;
51 {添加热键}
52 procedure AddHotKey(const HotKey:THotKey);
53 {注册}
54 procedure RegisterHotKeys;
55 property HotKeys[const Index:Integer]:THotKey read GetHotKeys;
56 property Count:Integer read GetCount;
57 end;
58
59 function EmptyHotKey:THotKey;
60
61 implementation
62
63 function EmptyHotKey:THotKey;
64 begin
65 Result.Shift:=0;
66 Result.Key:=0;
67 Result.Event:=nil;
68 end;
69
70 { THotKeys }
71
72 procedure THotKeys.AddHotKey(const HotKey: THotKey);
73 begin
74 if IsEmptyHotKey(HotKey) then Exit;
75 SetLength(FHotKeys,Count + 1);
76 with FHotKeys[Count - 1].HotKey do
77 begin
78 Shift:=HotKey.Shift;
79 Key:=HotKey.Key;
80 Event:=HotKey.Event;
81 end;
82 FHotKeys[Count - 1].Registered:=False;
83 end;
84
85 constructor THotKeys.Create(const Atom:string);
86 begin
87 FHotKeyHandle:=AllocateHWnd(HotKeyHooks);
88 FAtom:=Atom;
89 end;
90
91 destructor THotKeys.Destroy;
92 begin
93 UnRegisterHotKeys;
94 DeallocateHWnd(FHotKeyHandle);
95 inherited;
96 end;
97
98 function THotKeys.GetCount: Integer;
99 begin
100 Result:=Length(FHotKeys);
101 end;
102
103 function THotKeys.GetHotKeys(const Index: Integer): THotKey;
104 begin
105 Result:=EmptyHotKey;
106 if Index in [0..Count] then
107 if FHotKeys[index].Registered then
108 Result:=FHotKeys[index].HotKey;
109 end;
110
111 function THotKeys.GetHotKeyEvent(const HotKey: THotKey): THotKeyEvent;
112 var
113 i:Integer;
114 begin
115 Result:=nil;
116 for i:=Low(FHotKeys) to High(FHotKeys) do
117 if SameHotKey(FHotKeys[i].HotKey,HotKey) then
118 begin
119 Result:=FHotKeys[i].HotKey.Event;
120 Break;
121 end;
122 end;
123
124 procedure THotKeys.HotKeyHooks(var Message: TMessage);
125 var
126 AHotKey:THotKey;
127 AHotKeyEvent:THotKeyEvent;
128 begin
129 AHotKey.Shift:=Message.LParamLo;
130 AHotKey.Key:=Message.LParamHi;
131 AHotKeyEvent:=GetHotKeyEvent(AHotKey);
132 if Assigned(AHotKeyEvent) then
133 AHotKeyEvent(AHotKey.Shift,AHotKey.Key);
134 end;
135
136 function THotKeys.IsEmptyHotKey(const HotKey: THotKey): Boolean;
137 begin
138 with HotKey do
139 Result:= (Shift = 0 ) or (Key = 0);
140 end;
141
142 procedure THotKeys.RegisterHotKeys;
143 var
144 Atom:Word;
145 HotKey:THotKey;
146 i:Integer;
147 begin
148 for i:= Low(FHotKeys) to High(FHotKeys) do
149 begin
150 HotKey:=FHotKeys[i].HotKey;
151 Atom:=GlobalAddAtom(PChar(FAtom + '_' + IntToStr(HotKey.Key)));
152 FHotKeys[i].Atom:=Atom;
153 if RegisterHotKey(FHotKeyHandle,Atom ,HotKey.Shift,HotKey.Key) then
154 FHotKeys[Count - 1].Registered:=True;
155 end;
156 end;
157
158 function THotKeys.SameHotKey(const HotKeyA, HotKeyB: THotKey): Boolean;
159 begin
160 Result:=(HotKeyA.Shift = HotKeyB.Shift) and (HotKeyA.Key = HotKeyB.Key);
161 end;
162
163 procedure THotKeys.UnRegisterHotKeys;
164 var
165 i:Integer;
166 begin
167 for i:= Low(FHotKeys) to High(FHotKeys) do
168 begin
169 if FHotKeys[i].Registered then
170 begin
171 UnRegisterHotKey(FHotKeyHandle,FHotKeys[i].Atom);
172 GlobalDeleteAtom(FHotKeys[i].Atom);
173 end;
174 end;
175 end;
176
177 end.
2 热键注册
3 作者: 张金利 日期: 2010.08.12
4 说明:
5 -------------------------------------------------------------------------------}
6 unit Utility.HotKeys;
7
8 interface
9 uses
10 Windows,Messages,Classes,SysUtils;
11 Type
12 {热键事件}
13 THotKeyEvent = procedure(const Shift,Key:Cardinal) of object;
14 {一个热键}
15 THotKey = record
16 Shift:Cardinal;
17 Key:Cardinal;
18 Event:THotKeyEvent;
19 end;
20 {已注册的热键}
21 TRegisteredHotKey = record
22 Atom:Word;
23 HotKey:THotKey;
24 Registered:Boolean;
25 end;
26
27 {热键}
28 THotKeys = class
29 private
30 {接收句柄}
31 FHotKeyHandle:THandle;
32 FAtom:string;
33 FHotKeys:array of TRegisteredHotKey;
34 {空热键}
35 function IsEmptyHotKey(const HotKey:THotKey):Boolean;
36 {取消注册}
37 procedure UnRegisterHotKeys;
38 {取得热键}
39 function GetHotKeys(const Index:Integer):THotKey;
40 {注册的数量}
41 function GetCount:Integer;
42 {两个热键相同}
43 function SameHotKey(const HotKeyA,HotKeyB:THotKey):Boolean;
44 {热键事件}
45 function GetHotKeyEvent(const HotKey:THotKey):THotKeyEvent;
46 {热键消息捕捉过程}
47 procedure HotKeyHooks(var Message: TMessage);message WM_HOTKEY;
48 public
49 constructor Create(const Atom:string);
50 destructor Destroy;override;
51 {添加热键}
52 procedure AddHotKey(const HotKey:THotKey);
53 {注册}
54 procedure RegisterHotKeys;
55 property HotKeys[const Index:Integer]:THotKey read GetHotKeys;
56 property Count:Integer read GetCount;
57 end;
58
59 function EmptyHotKey:THotKey;
60
61 implementation
62
63 function EmptyHotKey:THotKey;
64 begin
65 Result.Shift:=0;
66 Result.Key:=0;
67 Result.Event:=nil;
68 end;
69
70 { THotKeys }
71
72 procedure THotKeys.AddHotKey(const HotKey: THotKey);
73 begin
74 if IsEmptyHotKey(HotKey) then Exit;
75 SetLength(FHotKeys,Count + 1);
76 with FHotKeys[Count - 1].HotKey do
77 begin
78 Shift:=HotKey.Shift;
79 Key:=HotKey.Key;
80 Event:=HotKey.Event;
81 end;
82 FHotKeys[Count - 1].Registered:=False;
83 end;
84
85 constructor THotKeys.Create(const Atom:string);
86 begin
87 FHotKeyHandle:=AllocateHWnd(HotKeyHooks);
88 FAtom:=Atom;
89 end;
90
91 destructor THotKeys.Destroy;
92 begin
93 UnRegisterHotKeys;
94 DeallocateHWnd(FHotKeyHandle);
95 inherited;
96 end;
97
98 function THotKeys.GetCount: Integer;
99 begin
100 Result:=Length(FHotKeys);
101 end;
102
103 function THotKeys.GetHotKeys(const Index: Integer): THotKey;
104 begin
105 Result:=EmptyHotKey;
106 if Index in [0..Count] then
107 if FHotKeys[index].Registered then
108 Result:=FHotKeys[index].HotKey;
109 end;
110
111 function THotKeys.GetHotKeyEvent(const HotKey: THotKey): THotKeyEvent;
112 var
113 i:Integer;
114 begin
115 Result:=nil;
116 for i:=Low(FHotKeys) to High(FHotKeys) do
117 if SameHotKey(FHotKeys[i].HotKey,HotKey) then
118 begin
119 Result:=FHotKeys[i].HotKey.Event;
120 Break;
121 end;
122 end;
123
124 procedure THotKeys.HotKeyHooks(var Message: TMessage);
125 var
126 AHotKey:THotKey;
127 AHotKeyEvent:THotKeyEvent;
128 begin
129 AHotKey.Shift:=Message.LParamLo;
130 AHotKey.Key:=Message.LParamHi;
131 AHotKeyEvent:=GetHotKeyEvent(AHotKey);
132 if Assigned(AHotKeyEvent) then
133 AHotKeyEvent(AHotKey.Shift,AHotKey.Key);
134 end;
135
136 function THotKeys.IsEmptyHotKey(const HotKey: THotKey): Boolean;
137 begin
138 with HotKey do
139 Result:= (Shift = 0 ) or (Key = 0);
140 end;
141
142 procedure THotKeys.RegisterHotKeys;
143 var
144 Atom:Word;
145 HotKey:THotKey;
146 i:Integer;
147 begin
148 for i:= Low(FHotKeys) to High(FHotKeys) do
149 begin
150 HotKey:=FHotKeys[i].HotKey;
151 Atom:=GlobalAddAtom(PChar(FAtom + '_' + IntToStr(HotKey.Key)));
152 FHotKeys[i].Atom:=Atom;
153 if RegisterHotKey(FHotKeyHandle,Atom ,HotKey.Shift,HotKey.Key) then
154 FHotKeys[Count - 1].Registered:=True;
155 end;
156 end;
157
158 function THotKeys.SameHotKey(const HotKeyA, HotKeyB: THotKey): Boolean;
159 begin
160 Result:=(HotKeyA.Shift = HotKeyB.Shift) and (HotKeyA.Key = HotKeyB.Key);
161 end;
162
163 procedure THotKeys.UnRegisterHotKeys;
164 var
165 i:Integer;
166 begin
167 for i:= Low(FHotKeys) to High(FHotKeys) do
168 begin
169 if FHotKeys[i].Registered then
170 begin
171 UnRegisterHotKey(FHotKeyHandle,FHotKeys[i].Atom);
172 GlobalDeleteAtom(FHotKeys[i].Atom);
173 end;
174 end;
175 end;
176
177 end.