1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
{
fpGUI - Free Pascal GUI Library
Menu class declarations
Copyright (C) 2000 - 2006 See the file AUTHORS.txt, included in this
distribution, for details of the copyright.
See the file COPYING.modifiedLGPL, included in this distribution,
for details about redistributing fpGUI.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
}
{%mainunit fpgui.pp}
{
All menu and menu item implementations
}
{$IFDEF read_interface}
TPopupMenu = class;
TMenuBar = class;
{ TMenuItem }
TMenuItem = class(TCustomPanel)
private
FHotKeyDef: string;
FSeparator: boolean;
FSubMenu: TPopupMenu;
function GetSubMenu: TPopupMenu;
procedure InternalShowPopupMenu;
protected
procedure Paint(Canvas: TFCanvas); override;
function ProcessEvent(Event: TEventObj): Boolean; override;
procedure Click; override;
public
constructor Create(const pText: string; pOwner: TComponent); overload;
destructor Destroy; override;
property SubMenu: TPopupMenu read GetSubMenu;
published
property Separator: boolean read FSeparator write FSeparator;
property HotKeyDef: string read FHotKeyDef write FHotKeyDef;
property Text;
property Visible;
property Enabled;
end;
{ TPopupMenu }
TPopupMenu = class(TPopupWindow)
private
FMenu: TMenuBar;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
function AddMenu(const pTitle: string): TMenuItem;
function AddMenu(const pTitle: string; const pHotKeyDef: string; pHandlerProc: TNotifyEvent): TMenuItem;
end;
{ TMenuBar }
TMenuBar = class(TCustomBoxLayout)
private
protected
public
constructor Create(AOwner: TComponent); override;
function AddMenu(const pTitle: string): TMenuItem;
function AddMenu(const pTitle: string; const pHotKeyDef: string; pHandlerProc: TNotifyEvent): TMenuItem;
published
end;
{$ENDIF read_interface}
{$IFDEF read_implementation}
{ TMenuItem }
function TMenuItem.GetSubMenu: TPopupMenu;
begin
if not Assigned(FSubMenu) then
FSubMenu := TPopupMenu.Create(self);
Result := FSubMenu;
end;
procedure TMenuItem.InternalShowPopupMenu;
begin
if Assigned(FSubMenu) and FSubMenu.Visible then
begin
FSubMenu.Close;
Exit; //==>
end;
if not Assigned(FSubMenu) then
begin
FSubMenu := TPopupMenu.Create(Self);
end;
FSubMenu.SetPosition(ClientToScreen(Point(0, Height)));
FSubMenu.Show;
FSubMenu.Wnd.SetMinMaxClientSize(MaxSize, MaxSize);
end;
procedure TMenuItem.Paint(Canvas: TFCanvas);
begin
if (wsClicked in WidgetState) or (wsMouseInside in WidgetState) then
FBevelStyle := bsRaised
// else if (wsClicked in WidgetState) then
// FBevelStyle := bsLowered
else
FBevelStyle := bsPlain;
inherited Paint(Canvas);
end;
function TMenuItem.ProcessEvent(Event: TEventObj): Boolean;
begin
{$IFDEF DEBUG}
if Event.InheritsFrom(TMouseEnterEventObj) then
writeln(Format('MouseEnter for %s:%s', [Text, Classname]))
else if Event.InheritsFrom(TMouseLeaveEventObj) then
writeln(Format('MouseLeave for %s:%s', [Text, Classname]));
{$ENDIF}
if Event.InheritsFrom(TMouseEnterEventObj) then
begin
Include(WidgetState, wsMouseInside);
Redraw;
result := True;
end
else if Event.InheritsFrom(TMouseLeaveEventObj) then
begin
Exclude(WidgetState, wsMouseInside);
Redraw;
result := True;
end
else
result := inherited ProcessEvent(Event);
end;
procedure TMenuItem.Click;
begin
if (wsMouseInside in WidgetState) and Assigned(FSubMenu) then
begin
InternalShowPopupMenu;
end
else
inherited Click;
if FindForm is TPopupMenu then
TPopupMenu(FindForm).Close;
end;
constructor TMenuItem.Create(const pText: string; pOwner: TComponent);
begin
inherited Create(pText, pOwner);
WidgetStyle := WidgetStyle + [wsCaptureMouse, wsClickable, wsOpaque];
FBevelStyle := bsPlain;
end;
destructor TMenuItem.Destroy;
begin
if Assigned(FSubMenu) then
FSubMenu.Free;
inherited Destroy;
end;
{ TPopupMenu }
constructor TPopupMenu.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
WidgetStyle := WidgetStyle + [wsCaptureMouse, wsClickable, wsOpaque];
BorderWidth := 1;
Color := clBlack;
Name := '#MenuPopup';
FMenu := TMenuBar.Create(self);
FMenu.Name := '#VBoxMenu';
FMenu.Orientation := Vertical;
FMenu.Spacing := 0;
InsertChild(FMenu);
end;
destructor TPopupMenu.Destroy;
begin
FMenu.Free;
inherited Destroy;
end;
function TPopupMenu.AddMenu(const pTitle: string): TMenuItem;
begin
Result := FMenu.AddMenu(pTitle);
end;
function TPopupMenu.AddMenu(const pTitle: string; const pHotKeyDef: string;
pHandlerProc: TNotifyEvent): TMenuItem;
begin
Result := FMenu.AddMenu(pTitle, photKeyDef, pHandlerProc);
end;
{ TMenuBar }
constructor TMenuBar.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
WidgetStyle := WidgetStyle + [wsCaptureMouse, wsClickable, wsOpaque];
FCanExpandHeight := False;
Spacing := 0;
end;
function TMenuBar.AddMenu(const pTitle: string): TMenuItem;
begin
Result := TMenuItem.Create(pTitle, self);
InsertChild(Result);
end;
function TMenuBar.AddMenu(const pTitle: string; const pHotKeyDef: string;
pHandlerProc: TNotifyEvent): TMenuItem;
begin
Result := AddMenu(pTitle);
if pTitle <> '-' then
begin
Result.Text := pTitle;
Result.HotKeyDef := pHotKeyDef;
Result.OnClick := pHandlerProc;
end
else
Result.Separator := True;
end;
{$ENDIF read_implementation}
|
