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
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
|
////////////////////////////////////////////////////////////////////////////////
// All code below is exclusively owned by author of Chess4Net - Pavel Perminov
// (packpaul@mail.ru, packpaul1@gmail.com).
// Any changes, modifications, borrowing and adaptation are a subject for
// explicit permition from the owner.
unit MessageDialogUnit;
interface
uses
Forms, TntForms, Dialogs, Classes;
function CreateMessageDialog(AOwner: TComponent; const Msg: WideString; DlgType: TMsgDlgType;
Buttons: TMsgDlgButtons; bStayOnTopIfNoOwner: boolean = FALSE): TTntForm; overload;
function CreateMessageDialog(AOwner: TComponent; const Msg: WideString;
DlgType: TMsgDlgType; Buttons: TMsgDlgButtons; DefaultButton: TMsgDlgBtn;
bStayOnTopIfNoOwner: boolean = FALSE): TTntForm; overload;
implementation
uses
Types, StdCtrls, TntStdCtrls, Graphics, Windows, TntWindows, Consts, Math,
ExtCtrls, TntExtCtrls, Controls, SysUtils,
// Chess4Net units
LocalizerUnit;
type
TMessageForm = class(TTntForm)
private
Message: TTntLabel;
public
constructor CreateNew(AOwner: TComponent; bStayOnTop: boolean); reintroduce;
end;
////////////////////////////////////////////////////////////////////////////////
// Globals
var
// ButtonWidths : array[TMsgDlgBtn] of integer; // initialized to zero
{
ButtonCaptions: array[TMsgDlgBtn] of Pointer = (
@SMsgDlgYes, @SMsgDlgNo, @SMsgDlgOK, @SMsgDlgCancel, @SMsgDlgAbort,
@SMsgDlgRetry, @SMsgDlgIgnore, @SMsgDlgAll, @SMsgDlgNoToAll, @SMsgDlgYesToAll,
@SMsgDlgHelp);
}
IconIDs: array[TMsgDlgType] of PChar = (IDI_EXCLAMATION, IDI_HAND,
IDI_ASTERISK, IDI_QUESTION, nil);
{
Captions: array[TMsgDlgType] of Pointer = (@SMsgDlgWarning, @SMsgDlgError,
@SMsgDlgInformation, @SMsgDlgConfirm, nil);
}
ButtonNames: array[TMsgDlgBtn] of string = (
'Yes', 'No', 'OK', 'Cancel', 'Abort', 'Retry', 'Ignore', 'All', 'NoToAll',
'YesToAll', 'Help');
ModalResults: array[TMsgDlgBtn] of Integer = (
mrYes, mrNo, mrOk, mrCancel, mrAbort, mrRetry, mrIgnore, mrAll, mrNoToAll,
mrYesToAll, 0);
function CreateMessageDialog(AOwner: TComponent; const Msg: WideString;
DlgType: TMsgDlgType; Buttons: TMsgDlgButtons; DefaultButton: TMsgDlgBtn;
bStayOnTopIfNoOwner: boolean = FALSE): TTntForm; overload;
function NGetAveCharSize(Canvas: TCanvas): TPoint;
var
I: Integer;
Buffer: array[0..51] of Char;
begin
for I := 0 to 25 do Buffer[I] := Chr(I + Ord('A'));
for I := 0 to 25 do Buffer[I + 26] := Chr(I + Ord('a'));
GetTextExtentPoint(Canvas.Handle, Buffer, 52, TSize(Result));
Result.X := Result.X div 52;
end;
function NGetButtonCaption(MsgDlgBtn: TMsgDlgBtn): WideString;
begin
with TLocalizer.Instance do
case MsgDlgBtn of
mbYes: Result := GetLabel(40);
mbNo: Result := GetLabel(41);
mbOK: Result := GetLabel(42);
mbCancel: Result := GetLabel(43);
mbAbort: Result := GetLabel(44);
mbRetry: Result := GetLabel(45);
mbIgnore: Result := GetLabel(46);
mbAll: Result := GetLabel(47);
mbNoToAll: Result := GetLabel(48);
mbYesToAll: Result := GetLabel(49);
mbHelp: Result := GetLabel(50);
else
raise Exception.Create('Unexpected MsgDlgBtn in CreateMessageDialog\NGetButtonCaption.');
end;
end;
function NGetMessageCaption(MsgType: TMsgDlgType): WideString;
begin
case MsgType of
mtWarning: Result := SMsgDlgWarning;
mtError: Result := SMsgDlgError;
mtInformation: Result := SMsgDlgInformation;
mtConfirmation: Result := SMsgDlgConfirm;
mtCustom: Result := '';
else
raise Exception.Create('Unexpected MsgType in CreateMessageDialog\NGetMessageCaption.');
end;
end;
const
mcHorzMargin = 8;
mcVertMargin = 8;
mcHorzSpacing = 10;
mcVertSpacing = 10;
mcButtonWidth = 50;
mcButtonHeight = 14;
mcButtonSpacing = 4;
var
bStayOnTop: boolean;
DialogUnits: TPoint;
HorzMargin, VertMargin, HorzSpacing, VertSpacing, ButtonWidth,
ButtonHeight, ButtonSpacing, ButtonCount, ButtonGroupWidth,
IconTextWidth, IconTextHeight, X, ALeft: Integer;
B, CancelButton: TMsgDlgBtn;
IconID: PAnsiChar;
ATextRect: TRect;
ThisButtonWidth: integer;
LButton: TTntButton;
begin { CreateMessageDialog }
if (Assigned(AOwner)) then
bStayOnTop := (AOwner.InheritsFrom(TForm) and (TForm(AOwner).FormStyle = fsStayOnTOp))
else
bStayOnTop := bStayOnTopIfNoOwner;
Result := TMessageForm.CreateNew(AOwner, bStayOnTop);
with Result do
begin
BorderStyle := bsDialog; // By doing this first, it will work on WINE.
BiDiMode := Application.BiDiMode;
Canvas.Font := Font;
KeyPreview := True;
Position := poDesigned;
DialogUnits := NGetAveCharSize(Canvas);
HorzMargin := MulDiv(mcHorzMargin, DialogUnits.X, 4);
VertMargin := MulDiv(mcVertMargin, DialogUnits.Y, 8);
HorzSpacing := MulDiv(mcHorzSpacing, DialogUnits.X, 4);
VertSpacing := MulDiv(mcVertSpacing, DialogUnits.Y, 8);
ButtonWidth := MulDiv(mcButtonWidth, DialogUnits.X, 4);
for B := Low(TMsgDlgBtn) to High(TMsgDlgBtn) do
begin
if B in Buttons then
begin
ATextRect := Rect(0,0,0,0);
Tnt_DrawTextW(Canvas.Handle,
PWideChar(NGetButtonCaption(B)), -1,
ATextRect, DT_CALCRECT or DT_LEFT or DT_SINGLELINE or
DrawTextBiDiModeFlagsReadingOnly);
with ATextRect do ThisButtonWidth := Right - Left + 8;
if ThisButtonWidth > ButtonWidth then
ButtonWidth := ThisButtonWidth;
end;
end;
ButtonHeight := MulDiv(mcButtonHeight, DialogUnits.Y, 8);
ButtonSpacing := MulDiv(mcButtonSpacing, DialogUnits.X, 4);
SetRect(ATextRect, 0, 0, Screen.Width div 2, 0);
Tnt_DrawTextW(Canvas.Handle, PWideChar(Msg), Length(Msg) + 1, ATextRect,
DT_EXPANDTABS or DT_CALCRECT or DT_WORDBREAK or
DrawTextBiDiModeFlagsReadingOnly);
IconID := IconIDs[DlgType];
IconTextWidth := ATextRect.Right;
IconTextHeight := ATextRect.Bottom;
if IconID <> nil then
begin
Inc(IconTextWidth, 32 + HorzSpacing);
if IconTextHeight < 32 then IconTextHeight := 32;
end;
ButtonCount := 0;
for B := Low(TMsgDlgBtn) to High(TMsgDlgBtn) do
if B in Buttons then Inc(ButtonCount);
ButtonGroupWidth := 0;
if ButtonCount <> 0 then
ButtonGroupWidth := ButtonWidth * ButtonCount +
ButtonSpacing * (ButtonCount - 1);
ClientWidth := Max(IconTextWidth, ButtonGroupWidth) + HorzMargin * 2;
ClientHeight := IconTextHeight + ButtonHeight + VertSpacing +
VertMargin * 2;
Left := (Screen.Width div 2) - (Width div 2);
Top := (Screen.Height div 2) - (Height div 2);
if DlgType <> mtCustom then
Caption := NGetMessageCaption(DlgType)
else
Caption := TntApplication.Title;
if IconID <> nil then
with TTntImage.Create(Result) do
begin
Name := 'Image';
Parent := Result;
Picture.Icon.Handle := LoadIcon(0, IconID);
SetBounds(HorzMargin, VertMargin, 32, 32);
end;
TMessageForm(Result).Message := TTntLabel.Create(Result);
with TMessageForm(Result).Message do
begin
Name := 'Message';
Parent := Result;
WordWrap := True;
Caption := Msg;
BoundsRect := ATextRect;
BiDiMode := Result.BiDiMode;
ALeft := IconTextWidth - ATextRect.Right + HorzMargin;
if UseRightToLeftAlignment then
ALeft := Result.ClientWidth - ALeft - Width;
SetBounds(ALeft, VertMargin,
ATextRect.Right, ATextRect.Bottom);
end;
if mbCancel in Buttons then CancelButton := mbCancel else
if mbNo in Buttons then CancelButton := mbNo else
CancelButton := mbOk;
X := (ClientWidth - ButtonGroupWidth) div 2;
for B := Low(TMsgDlgBtn) to High(TMsgDlgBtn) do
if B in Buttons then
begin
LButton := TTntButton.Create(Result);
with LButton do
begin
Name := ButtonNames[B];
Parent := Result;
Caption := NGetButtonCaption(B);
ModalResult := ModalResults[B];
if B = DefaultButton then
begin
Default := True;
ActiveControl := LButton;
end;
if B = CancelButton then
Cancel := True;
SetBounds(X, IconTextHeight + VertMargin + VertSpacing,
ButtonWidth, ButtonHeight);
Inc(X, ButtonWidth + ButtonSpacing);
end;
end;
end;
end;
function CreateMessageDialog(AOwner: TComponent; const Msg: WideString; DlgType: TMsgDlgType;
Buttons: TMsgDlgButtons; bStayOnTopIfNoOwner: boolean = FALSE): TTntForm;
var
DefaultButton: TMsgDlgBtn;
begin
if mbOk in Buttons then
DefaultButton := mbOk
else if mbYes in Buttons then
DefaultButton := mbYes
else
DefaultButton := mbRetry;
Result := CreateMessageDialog(AOwner, Msg, DlgType, Buttons, DefaultButton, bStayOnTopIfNoOwner);
end;
////////////////////////////////////////////////////////////////////////////////
// TMessageForm
constructor TMessageForm.CreateNew(AOwner: TComponent; bStayOnTop: boolean);
var
NonClientMetrics: TNonClientMetrics;
begin
if (bStayOnTop) then
FormStyle := fsStayOnTop;
inherited CreateNew(AOwner);
NonClientMetrics.cbSize := sizeof(NonClientMetrics);
if SystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, @NonClientMetrics, 0) then
Font.Handle := CreateFontIndirect(NonClientMetrics.lfMessageFont);
end;
end.
|
