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{
fpGUI - Free Pascal GUI Toolkit
Copyright (C) 2006 - 2008 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.
Description:
Property editors.
}
unit vfdprops;
{$mode objfpc}{$H+}
interface
uses
Classes,
SysUtils,
fpg_base,
fpg_widget,
vfdwidgetclass,
fpg_edit,
fpg_button,
fpg_combobox;
type
TPropertyString = class(TVFDWidgetProperty)
public
function ParseSourceLine(wg: TfpgWidget; const line: string): boolean; override;
function GetPropertySource(wg: TfpgWidget; const ident: string): string; override;
function GetValueText(wg: TfpgWidget): string; override;
function CreateEditor(AOwner: TComponent): TVFDPropertyEditor; override;
end;
TPropertyInteger = class(TVFDWidgetProperty)
public
function ParseSourceLine(wg: TfpgWidget; const line: string): boolean; override;
function GetPropertySource(wg: TfpgWidget; const ident: string): string; override;
function GetValueText(wg: TfpgWidget): string; override;
function CreateEditor(AOwner: TComponent): TVFDPropertyEditor; override;
end;
TPropertyEnum = class(TVFDWidgetProperty)
public
function ParseSourceLine(wg: TfpgWidget; const line: string): boolean; override;
function GetPropertySource(wg: TfpgWidget; const ident: string): string; override;
function GetValueText(wg: TfpgWidget): string; override;
function CreateEditor(AOwner: TComponent): TVFDPropertyEditor; override;
end;
TPropertyStringList = class(TVFDWidgetProperty)
public
function ParseSourceLine(wg: TfpgWidget; const line: string): boolean; override;
function GetPropertySource(wg: TfpgWidget; const ident: string): string; override;
function GetValueText(wg: TfpgWidget): string; override;
function CreateEditor(AOwner: TComponent): TVFDPropertyEditor; override;
procedure OnExternalEdit(wg: TfpgWidget); override;
end;
TPropertyBoolean = class(TVFDWidgetProperty)
public
function ParseSourceLine(wg: TfpgWidget; const line: string): boolean; override;
function GetPropertySource(wg: TfpgWidget; const ident: string): string; override;
function GetValueText(wg: TfpgWidget): string; override;
function CreateEditor(AOwner: TComponent): TVFDPropertyEditor; override;
end;
TPropertyFontDesc = class(TPropertyString)
function CreateEditor(AOwner: TComponent): TVFDPropertyEditor; override;
procedure OnExternalEdit(wg: TfpgWidget); override;
end;
TGPEType = (gptInteger, gptString);
TGeneralPropertyEditor = class(TVFDPropertyEditor)
private
FOrigValue: string;
procedure EditExit(Sender: TObject);
procedure EditKeyPressed(Sender: TObject; var KeyCode: word;
var ShiftState: TShiftState; var Consumed: boolean);
public
etype: TGPEType;
edit: TfpgEdit;
procedure CreateLayout; override;
procedure LoadValue(wg: TfpgWidget); override;
procedure StoreValue(wg: TfpgWidget); override;
procedure LoadIntValue(wg: TfpgWidget);
procedure StoreIntValue(wg: TfpgWidget);
procedure LoadStrValue(wg: TfpgWidget);
procedure StoreStrValue(wg: TfpgWidget);
end;
TChoicePropertyEditor = class(TVFDPropertyEditor)
public
chl: TfpgComboBox;
procedure CreateLayout; override;
procedure LoadValue(wg: TfpgWidget); override;
procedure StoreValue(wg: TfpgWidget); override;
end;
TBooleanPropertyEditor = class(TChoicePropertyEditor)
public
procedure LoadValue(wg: TfpgWidget); override;
procedure StoreValue(wg: TfpgWidget); override;
end;
TExternalPropertyEditor = class(TVFDPropertyEditor)
protected
procedure HandlePaint; override;
public
btnEdit: TfpgButton;
Widget: TfpgWidget;
procedure CreateLayout; override;
procedure LoadValue(wg: TfpgWidget); override;
procedure StoreValue(wg: TfpgWidget); override;
procedure OnEditClick(Sender: TObject);
end;
procedure EditStringList(sl: TStringList);
procedure GetEnumPropValueList(wg: TObject; const APropName: string; sl: TStringList);
const
DefUndoOnPropExit = False;
var
UndoOnPropExit: Boolean = DefUndoOnPropExit;
implementation
uses
TypInfo,
vfdformparser,
vfdeditors,
fpg_main,
fpg_dialogs;
procedure EditStringList(sl: TStringList);
var
frm: TItemEditorForm;
begin
frm := TItemEditorForm.Create(nil);
try
frm.edItems.Lines.Assign(sl);
if frm.ShowModal = 1 then
sl.Assign(frm.edItems.Lines);
finally
frm.Free;
end;
end;
procedure GetEnumPropValueList(wg: TObject; const APropName: string; sl: TStringList);
var
lPropInfo: PPropInfo;
s: string;
lTypeData: PTypeData;
n: integer;
begin
lPropInfo := GetPropInfo(wg, APropName);
lTypeData := GetTypeData(lPropInfo^.PropType);
sl.BeginUpdate;
try
sl.Clear;
for n := lTypeData^.MinValue to lTypeData^.MaxValue do
begin
s := GetEnumName(lPropInfo^.PropType, n);
sl.Add(s);
end;
finally
sl.EndUpdate;
end;
end;
{ TPropertyString }
function TPropertyString.CreateEditor(AOwner: TComponent): TVFDPropertyEditor;
begin
Result := TGeneralPropertyEditor.Create(AOwner, self);
with TGeneralPropertyEditor(Result) do
etype := gptString;
end;
function TPropertyString.GetPropertySource(wg: TfpgWidget; const ident: string): string;
begin
Result := ident + Name + ' := ' + QuotedStr(GetStrProp(wg, Name)) + ';' + LineEnding;
end;
function TPropertyString.GetValueText(wg: TfpgWidget): string;
begin
Result := GetStrProp(wg, Name);
end;
function TPropertyString.ParseSourceLine(wg: TfpgWidget; const line: string): boolean;
var
s, sval: string;
begin
s := line;
Result := False;
if UpperCase(GetIdentifier(s)) <> UpperCase(Name) then
Exit;
Result := CheckSymbol(s, ':=');
if Result then
begin
sval := GetStringValue(s);
Result := CheckSymbol(s, ';');
end;
if Result then
SetStrProp(wg, Name, sval);
end;
{ TPropertyInteger }
function TPropertyInteger.CreateEditor(AOwner: TComponent): TVFDPropertyEditor;
begin
Result := TGeneralPropertyEditor.Create(AOwner, self);
with TGeneralPropertyEditor(Result) do
etype := gptInteger;
end;
function TPropertyInteger.GetPropertySource(wg: TfpgWidget; const ident: string): string;
var
PropInfo: PPropInfo;
begin
PropInfo := GetPropInfo(wg.ClassType, Name);
if PropInfo^.Default <> GetOrdProp(wg, Name) then
Result := ident + Name + ' := ' + IntToStr(GetOrdProp(wg, Name)) + ';' + LineEnding
else
Result := '';
end;
function TPropertyInteger.GetValueText(wg: TfpgWidget): string;
begin
Result := IntToStr(GetOrdProp(wg, Name));
end;
function TPropertyInteger.ParseSourceLine(wg: TfpgWidget; const line: string): boolean;
var
s: string;
ival: integer;
begin
s := line;
Result := False;
if UpperCase(GetIdentifier(s)) <> UpperCase(Name) then
Exit;
Result := CheckSymbol(s, ':=');
if Result then
begin
ival := GetIntValue(s);
Result := CheckSymbol(s, ';');
end
else
ival := 0;
if Result then
SetOrdProp(wg, Name, ival);
end;
{ TGeneralPropertyEditor }
procedure TGeneralPropertyEditor.EditExit(Sender: TObject);
begin
if FOrigValue <> edit.Text then
if UndoOnPropExit then
edit.Text := FOrigvalue
else
begin
UpdateProperty(nil);
FOrigValue := edit.Text;
end;
end;
procedure TGeneralPropertyEditor.EditKeyPressed(Sender: TObject;
var KeyCode: word; var ShiftState: TShiftState; var Consumed: boolean);
begin
if (KeyCode = keyReturn) or (KeyCode = keyPEnter) then
begin
UpdateProperty(nil);
FOrigValue := edit.Text;
end
else if (keycode=keyEscape) then
begin
edit.Text := FOrigValue;
end
else
inherited;
end;
procedure TGeneralPropertyEditor.CreateLayout;
begin
Anchors := [anTop, anLeft, anRight];
Edit := TfpgEdit.Create(self);
Edit.SetPosition(0, 0, Width, Height);
Edit.Anchors := Anchors;
// Edit.OnChange := @UpdateProperty;
Edit.OnKeyPress := @EditKeyPressed;
Edit.OnExit :=@EditExit;
Edit.Visible := True;
end;
procedure TGeneralPropertyEditor.LoadIntValue(wg: TfpgWidget);
begin
edit.Text := IntToStr(GetOrdProp(wg, prop.Name));
end;
procedure TGeneralPropertyEditor.LoadStrValue(wg: TfpgWidget);
var
s: string;
begin
s := GetStrProp(wg, prop.Name);
if etype = gptString then
edit.Text := s;
end;
procedure TGeneralPropertyEditor.LoadValue(wg: TfpgWidget);
begin
case etype of
gptInteger:
LoadIntValue(wg);
else
LoadStrValue(wg);
end;
FOrigValue := edit.Text;
end;
procedure TGeneralPropertyEditor.StoreIntValue(wg: TfpgWidget);
var
i: integer;
begin
try
i := StrToInt(edit.Text);
SetOrdProp(wg, Prop.Name, i);
except
// error
end;
end;
procedure TGeneralPropertyEditor.StoreStrValue(wg: TfpgWidget);
var
s: string;
begin
if etype = gptString then
s := edit.Text;
SetStrProp(wg, prop.Name, s);
end;
procedure TGeneralPropertyEditor.StoreValue(wg: TfpgWidget);
begin
case etype of
gptInteger: StoreIntValue(wg);
else
StoreStrValue(wg);
end;
end;
{ TPropertyStringList }
function TPropertyStringList.CreateEditor(AOwner: TComponent): TVFDPropertyEditor;
begin
Result := TExternalPropertyEditor.Create(AOwner, self);
end;
function TPropertyStringList.GetPropertySource(wg: TfpgWidget; const ident: string): string;
var
sl: TStringList;
f: integer;
begin
sl := TStringList(GetObjectProp(wg, Name, TStrings));
if not Assigned(sl) then
raise Exception.Create('Failed to find TStrings type property.');
Result := '';
//if sl.Text <> '' then
//begin
//writeln('Text = <', sl.Text, '>');
//writeln('StringList.Count = ', sl.Count);
for f := 0 to sl.Count - 1 do
Result := Result + ident + Name + '.Add(' + QuotedStr(sl.Strings[f]) + ');' + LineEnding;
//end;
end;
function TPropertyStringList.GetValueText(wg: TfpgWidget): string;
var
sl: TStringList;
begin
sl := TStringList(GetObjectProp(wg, Name, TStrings));
if not Assigned(sl) then
raise Exception.Create('Failed to find TStrings type property.');
Result := '[' + IntToStr(sl.Count) + ' lines]';
end;
procedure TPropertyStringList.OnExternalEdit(wg: TfpgWidget);
var
sl: TStringList;
begin
sl := TStringList(GetObjectProp(wg, Name, TStrings));
if not Assigned(sl) then
raise Exception.Create('Failed to find TStrings type property.');
EditStringList(sl);
end;
function TPropertyStringList.ParseSourceLine(wg: TfpgWidget; const line: string): boolean;
var
s: string;
sval: string;
sl: TStringList;
begin
s := line;
Result := False;
if UpperCase(GetIdentifier(s)) <> UpperCase(Name) then
Exit;
Result := CheckSymbol(s, '.');
Result := Result and (UpperCase(GetIdentifier(s)) = 'ADD');
Result := Result and CheckSymbol(s, '(');
if Result then
begin
sval := GetStringValue(s);
Result := Result and CheckSymbol(s, ')');
Result := Result and CheckSymbol(s, ';');
end;
if Result then
begin
sl := TStringList(GetObjectProp(wg, Name, TStrings));
if not Assigned(sl) then
raise Exception.Create('Failed to find TStrings type property.');
sl.Add(sval);
end;
end;
{ TPropertyBoolean }
function TPropertyBoolean.ParseSourceLine(wg: TfpgWidget; const line: string): boolean;
var
s: string;
bval: boolean;
begin
s := line;
Result := False;
if UpperCase(GetIdentifier(s)) <> UpperCase(Name) then
Exit;
Result := CheckSymbol(s, ':=');
if Result then
begin
bval := GetBoolValue(s);
Result := CheckSymbol(s, ';');
end
else
bval := False;
if Result then
SetOrdProp(wg, Name, Ord(bval));
end;
function TPropertyBoolean.GetPropertySource(wg: TfpgWidget; const ident: string): string;
var
i: integer;
s: string;
PropInfo: PPropInfo;
begin
PropInfo := GetPropInfo(wg.ClassType, Name);
i := GetOrdProp(wg, Name);
if IsStoredProp(wg, PropInfo) then
begin
if PropInfo^.Default <> i then
begin
if i = 1 then
s := 'True'
else
s := 'False';
Result := ident + Name + ' := ' + s + ';' + LineEnding;
end
else
Result := '';
end;
end;
function TPropertyBoolean.GetValueText(wg: TfpgWidget): string;
begin
if GetOrdProp(wg, Name) = 1 then
Result := 'True'
else
Result := 'False';
end;
function TPropertyBoolean.CreateEditor(AOwner: TComponent): TVFDPropertyEditor;
begin
Result := TBooleanPropertyEditor.Create(AOwner, self);
end;
{ TExternalPropertyEditor }
procedure TExternalPropertyEditor.HandlePaint;
var
r: TfpgRect;
begin
// inherited HandlePaint;
// if not Windowed then
// Exit;
if widget = nil then
Exit;
Canvas.Clear(clBoxColor);
Canvas.GetWinRect(r);
Canvas.SetTextColor(clText1);
prop.DrawValue(Widget, Canvas, r, 0);
end;
procedure TExternalPropertyEditor.CreateLayout;
begin
inherited;
Widget := nil;
Anchors := [anTop, anLeft, anRight];
btnEdit := TfpgButton.Create(self);
with btnEdit do
begin
Height := self.Height;
Width := 24;
Top := 0;
Left := self.Width - btnEdit.Width;
Text := '...';
UpdateWindowPosition;
Anchors := [anTop, anRight];
OnClick := @OnEditClick;
Visible := True;
end;
end;
procedure TExternalPropertyEditor.LoadValue(wg: TfpgWidget);
begin
Widget := wg;
RePaint;
end;
procedure TExternalPropertyEditor.OnEditClick(Sender: TObject);
begin
if widget = nil then
Exit;
prop.OnExternalEdit(widget);
widget.Invalidate;
RePaint;
end;
procedure TExternalPropertyEditor.StoreValue(wg: TfpgWidget);
begin
// nothing
end;
{ TPropertyEnum }
function TPropertyEnum.CreateEditor(AOwner: TComponent): TVFDPropertyEditor;
begin
Result := TChoicePropertyEditor.Create(AOwner, self);
end;
function TPropertyEnum.GetValueText(wg: TfpgWidget): string;
begin
Result := GetEnumProp(wg, Name);
end;
function TPropertyEnum.GetPropertySource(wg: TfpgWidget; const ident: string): string;
var
PropInfo: PPropInfo;
begin
PropInfo := GetPropInfo(wg.ClassType, Name);
if PropInfo^.Default <> GetOrdProp(wg, Name) then
Result := ident + Name + ' := ' + GetEnumProp(wg, Name) + ';' + LineEnding
else
Result := '';
end;
function TPropertyEnum.ParseSourceLine(wg: TfpgWidget; const line: string): boolean;
var
s, sval: string;
begin
s := line;
Result := False;
if UpperCase(GetIdentifier(s)) <> UpperCase(Name) then
Exit;
Result := CheckSymbol(s, ':=');
if Result then
begin
sval := GetIdentifier(s);
Result := CheckSymbol(s, ';');
end;
if Result then
try
SetEnumProp(wg, Name, sval);
except
Writeln('invalid enum value: "' + sval + '" for ' + Name);
Result := False;
end;
end;
{ TChoicePropertyEditor }
procedure TChoicePropertyEditor.CreateLayout;
begin
Anchors := [anTop, anLeft, anRight];
chl := TfpgComboBox.Create(self);
chl.SetPosition(0, 0, Width, Height);
chl.Anchors := Anchors;
chl.OnChange := @UpdateProperty;
chl.Visible := True;
end;
procedure TChoicePropertyEditor.LoadValue(wg: TfpgWidget);
var
sv: string;
i, fi: integer;
sl: TStringList;
begin
sv := GetEnumProp(wg, prop.Name);
sl := TStringList.Create;
GetEnumPropValueList(wg, prop.Name, sl);
fi := 0;
for i := 0 to sl.Count - 1 do
begin
chl.Items.Add(sl.Strings[i]);
if UpperCase(sv) = UpperCase(sl.Strings[i]) then
fi := i;
end;
chl.FocusItem := fi;
sl.Free;
end;
procedure TChoicePropertyEditor.StoreValue(wg: TfpgWidget);
begin
SetEnumProp(wg, prop.Name, chl.Text);
end;
{ TBooleanPropertyEditor }
procedure TBooleanPropertyEditor.LoadValue(wg: TfpgWidget);
var
b: integer;
begin
b := GetOrdProp(wg, prop.Name);
chl.Items.Add('True');
chl.Items.Add('False');
if b = 1 then
chl.FocusItem := 0
else
chl.FocusItem := 1;
end;
procedure TBooleanPropertyEditor.StoreValue(wg: TfpgWidget);
begin
SetOrdProp(wg, prop.Name, Ord(StrToBool(chl.Text)));
end;
{ TPropertyFontDesc }
function TPropertyFontDesc.CreateEditor(AOwner: TComponent): TVFDPropertyEditor;
begin
Result := TExternalPropertyEditor.Create(AOwner, self);
end;
procedure TPropertyFontDesc.OnExternalEdit(wg: TfpgWidget);
var
s: string;
begin
s := GetStrProp(wg, Name);
if SelectFontDialog(s) then
SetStrProp(wg, Name, s);
end;
end.
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