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
|
unit bufdatasetdsgn;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, DB, bufdataset,
LazUTF8,
ComponentEditors, FieldsEditor, ObjInspStrConsts;
Type
{ TBufDatasetDesignEditor }
TBufDatasetDesignEditor = Class(TFieldsComponentEditor)
FOffset : Integer;
FDatasetNames: TStrings;
private
procedure GetDatasetNames(const S: string);
Protected
function GetProjectDir: String; virtual;
Procedure CreateDataset(aBufDS : TCustomBufDataset); virtual;
Procedure LoadDataFromFile(aBufDS : TCustomBufDataset); virtual;
Procedure SaveDataToFile(aBufDS : TCustomBufDataset); virtual;
procedure CopyFromDataset(aBufDS: TCustomBufDataset); virtual;
Public
constructor Create(AComponent: TComponent; ADesigner: TComponentEditorDesigner); override;
Destructor Destroy; override;
function GetVerbCount: Integer; override;
function GetVerb(Index: Integer): string; override;
procedure ExecuteVerb(Index: Integer); override;
end;
implementation
Uses TypInfo, Forms, Dialogs, LazIDEintf, selectdatasetdlg;
{ TBufDatasetDesignEditor }
procedure TBufDatasetDesignEditor.CreateDataset(aBufDS: TCustomBufDataset);
begin
if aBufDs.Active then
ShowMessage(lrsDatasetActive)
else
aBufDS.CreateDataset;
Modified;
end;
procedure TBufDatasetDesignEditor.GetDatasetNames(const S: string);
begin
FDatasetNames.Add(S);
end;
function TBufDatasetDesignEditor.GetProjectDir: String;
begin
If Assigned(LazarusIDE) and Assigned(LazarusIDE.ActiveProject) then
Result:= LazarusIDE.ActiveProject.Directory
else
Result:=GetUserDir;
end;
procedure TBufDatasetDesignEditor.LoadDataFromFile(aBufDS: TCustomBufDataset);
Var
Dlg : TOpenDialog;
begin
Dlg:=TOpenDialog.Create(Application);
try
Dlg.InitialDir:=GetProjectDir;
Dlg.Title:=lrsSelectDataFileName;
Dlg.Filter:=lrsBufDSFilters;
Dlg.Options:=Dlg.Options+[ofFileMustExist];
if Dlg.Execute then
begin
aBufDS.LoadFromFile(Dlg.FileName);
Modified;
end;
finally
Dlg.Free;
end;
end;
procedure TBufDatasetDesignEditor.SaveDataToFile(aBufDS: TCustomBufDataset);
Var
Dlg : TOpenDialog;
begin
Dlg:=TSaveDialog.Create(Application);
try
Dlg.InitialDir:=GetProjectDir;
Dlg.Title:=lrsProvideDataFileName;
Dlg.Filter:=lrsBufDSFilters;
if Dlg.Execute then
begin
aBufDS.SaveToFile(Dlg.FileName);
end;
finally
Dlg.Free;
end;
end;
procedure TBufDatasetDesignEditor.CopyFromDataset(aBufDS : TCustomBufDataset);
Var
Idx : Integer;
aDatasetName : string;
aSrc : TDataset;
begin
if not Assigned(Designer.PropertyEditorHook) then
exit;
FreeAndNil(FDatasetNames); // Free previous instance if any
FDatasetNames:=TStringListUTF8Fast.Create;
Designer.PropertyEditorHook.GetComponentNames(GetTypeData(TypeInfo(TDataset)),@GetDatasetNames);
Idx:=FDatasetNames.IndexOf(aBufDS.Name);
if Idx<>-1 then
FDatasetNames.Delete(Idx);
if FDatasetNames.Count=0 then
begin
ShowMessage(lrsNoDatasetsAvailableForCopy);
exit;
end;
aDatasetName:=SelectDataset(FDatasetNames);
if aDatasetName='' then
exit;
aSrc:=TDataset(Designer.PropertyEditorHook.GetComponent(aDatasetName));
if not assigned(aSrc) then
exit;
aSrc.Active:=True;
aBufDS.CopyFromDataset(aSrc,True);
Modified;
end;
constructor TBufDatasetDesignEditor.Create(AComponent: TComponent; ADesigner: TComponentEditorDesigner);
begin
inherited Create(AComponent, ADesigner);
FOffset:=Inherited GetVerbCount;
end;
destructor TBufDatasetDesignEditor.Destroy;
begin
FreeAndNil(FDatasetNames);
inherited Destroy;
end;
function TBufDatasetDesignEditor.GetVerbCount: Integer;
begin
Result:=FOffset+4;
end;
function TBufDatasetDesignEditor.GetVerb(Index: Integer): string;
begin
if Index<FOffset then
Result:=Inherited GetVerb(Index)
else
Case Index-FOffset of
0 : Result:=lrsCreateDataset;
1 : Result:=lrsLoadFromFile;
2 : Result:=lrsSaveToFile;
3 : Result:=lrsCopyFromDataset;
end;
end;
procedure TBufDatasetDesignEditor.ExecuteVerb(Index: Integer);
Var
BufDS : TCustomBufDataset;
begin
if Index<FOffset then
Inherited ExecuteVerb(Index)
else
begin
BufDS:=GetComponent as TCustomBufDataset;
Case Index-FOffset of
0 : CreateDataset(BufDS);
1 : LoadDataFromFile(BufDS);
2 : SaveDataToFile(BufDS);
3 : CopyFromDataset(BufDS);
end;
end;
end;
initialization
RegisterComponentEditor(TBufDataset, TBufDatasetDesignEditor);
end.
|
