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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:
Defines a Text Edit control. Also known a Text Entry control.
}
unit fpg_edit;
{$mode objfpc}{$H+}
interface
uses
Classes,
SysUtils,
fpg_base,
fpg_main,
fpg_widget,
fpg_menu;
type
TfpgEditBorderStyle = (ebsNone, ebsDefault, ebsSingle);
TfpgBaseEdit = class(TfpgWidget)
private
FAutoSelect: Boolean;
FHideSelection: Boolean;
FPopupMenu: TfpgPopupMenu;
FDefaultPopupMenu: TfpgPopupMenu;
FText: string;
FPasswordMode: Boolean;
FBorderStyle: TfpgEditBorderStyle;
FOnChange: TNotifyEvent;
FMaxLength: integer;
FSelecting: Boolean;
procedure Adjust(UsePxCursorPos: boolean = false); virtual;
procedure AdjustTextOffset(UsePxCursorPos: boolean); virtual;
procedure AdjustDrawingInfo; virtual;
// function PointToCharPos(x, y: integer): integer;
procedure DeleteSelection;
procedure DoCopy;
procedure DoPaste;
procedure SetAutoSelect(const AValue: Boolean);
procedure SetBorderStyle(const AValue: TfpgEditBorderStyle);
procedure SetHideSelection(const AValue: Boolean);
procedure SetPasswordMode(const AValue: boolean);
function GetFontDesc: string;
procedure SetFontDesc(const AValue: string);
procedure SetText(const AValue: string);
procedure DefaultPopupCut(Sender: TObject);
procedure DefaultPopupCopy(Sender: TObject);
procedure DefaultPopupPaste(Sender: TObject);
procedure DefaultPopupClearAll(Sender: TObject);
procedure SetDefaultPopupMenuItemsState;
protected
FFont: TfpgFont;
FSideMargin: integer;
FMouseDragPos: integer;
FSelStart: integer;
FSelOffset: integer;
FCursorPos: integer; // Caret position (characters)
FCursorPx: integer; // Caret position (pixels)
FTextOffset: integer;
FDrawOffset: integer;
FVisibleText: TfpgString;
FVisSelStartPx: integer;
FVisSelEndPx: integer;
procedure DoOnChange; virtual;
procedure ShowDefaultPopupMenu(const x, y: integer; const shiftstate: TShiftState); virtual;
procedure HandlePaint; override;
procedure HandleResize(awidth, aheight: TfpgCoord); override;
procedure HandleKeyChar(var AText: TfpgChar; var shiftstate: TShiftState; var consumed: Boolean); override;
procedure HandleKeyPress(var keycode: word; var shiftstate: TShiftState; var consumed: Boolean); override;
procedure HandleLMouseDown(x, y: integer; shiftstate: TShiftState); override;
procedure HandleRMouseUp(x, y: integer; shiftstate: TShiftState); override;
procedure HandleMouseMove(x, y: integer; btnstate: word; shiftstate: TShiftState); override;
procedure HandleDoubleClick(x, y: integer; button: word; shiftstate: TShiftState); override;
procedure HandleMouseEnter; override;
procedure HandleMouseExit; override;
procedure HandleSetFocus; override;
procedure HandleKillFocus; override;
function GetDrawText: String;
property AutoSelect: Boolean read FAutoSelect write SetAutoSelect default True;
property BorderStyle: TfpgEditBorderStyle read FBorderStyle write SetBorderStyle default ebsDefault;
property FontDesc: String read GetFontDesc write SetFontDesc;
property HideSelection: Boolean read FHideSelection write SetHideSelection default True;
property MaxLength: Integer read FMaxLength write FMaxLength;
property PasswordMode: Boolean read FPasswordMode write SetPasswordMode default False;
property PopupMenu: TfpgPopupMenu read FPopupMenu write FPopupMenu;
property Text: String read FText write SetText;
property OnChange: TNotifyEvent read FOnChange write FOnChange;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
function SelectionText: string;
procedure SelectAll;
procedure Clear;
procedure ClearSelection;
procedure CopyToClipboard;
procedure CutToClipboard;
function GetClientRect: TfpgRect; override;
procedure PasteFromClipboard;
property Font: TfpgFont read FFont;
end;
TfpgEdit = class(TfpgBaseEdit)
public
property PopupMenu; // UI Designer doesn't fully support it yet
published
property AutoSelect;
property BackgroundColor default clBoxColor;
property BorderStyle;
property FontDesc;
property HideSelection;
property MaxLength;
property PasswordMode;
property ParentShowHint;
property ShowHint;
property TabOrder;
property Text;
property TextColor;
property OnChange;
property OnEnter;
property OnExit;
property OnKeyPress;
property OnMouseEnter;
property OnMouseExit;
property OnPaint;
end;
TfpgBaseNumericEdit = class(TfpgBaseEdit)
private
FDecimals: integer;
FOldColor: TfpgColor;
FAlignment: TAlignment;
FDecimalseparator: TfpgChar;
FNegativeColor: TfpgColor;
FThousandSeparator: TfpgChar;
FShowThousand: boolean;
procedure AdjustTextOffset(UsePxCursorPos: boolean); override;
procedure AdjustDrawingInfo; override;
procedure SetOldColor(const AValue: TfpgColor);
procedure SetAlignment(const AValue: TAlignment);
procedure SetDecimalSeparator(const AValue: TfpgChar);
procedure SetNegativeColor(const AValue: TfpgColor);
procedure SetThousandSeparator(const AValue: TfpgChar);
procedure SetShowThousand;
protected
procedure HandlePaint; override;
procedure FormatEdit; virtual;
procedure Justify; virtual; // to implement in derived classes
property OldColor: TfpgColor read FOldColor write SetOldColor;
property Alignment: TAlignment read FAlignment write SetAlignment default taRightJustify;
property AutoSelect;
property BackgroundColor default clBoxColor;
property BorderStyle;
{Someone likes to use English operating system but localized decimal and thousand separators
Still to implement !!}
property CustomDecimalSeparator: TfpgChar read FDecimalseparator write SetDecimalSeparator;
property CustomThousandSeparator: TfpgChar read FThousandSeparator write SetThousandSeparator;
property NegativeColor: TfpgColor read FNegativeColor write SetNegativeColor;
property HideSelection;
// property MaxLength; { probably MaxValue and MinValue }
property TabOrder;
property TextColor;
property ShowThousand: boolean read FShowThousand write FShowThousand default False;
property OnChange;
property OnEnter;
property OnExit;
property OnKeyPress;
property OnMouseEnter;
property OnMouseExit;
property OnPaint;
public
constructor Create(AOwner: TComponent); override;
published
property FontDesc;
end;
TfpgEditInteger = class(TfpgBaseNumericEdit)
protected
function GetValue: integer; virtual;
procedure SetValue(const AValue: integer); virtual;
procedure HandleKeyChar(var AText: TfpgChar; var shiftstate: TShiftState; var consumed: Boolean); override;
procedure HandleSetFocus; override;
procedure HandleKillFocus; override;
procedure HandlePaint; override;
public
constructor Create(AOwner: TComponent); override;
property OldColor;
property Text;
published
property NegativeColor;
property Value: integer read GetValue write SetValue;
property ParentShowHint;
property ShowHint;
property ShowThousand default True;
property TabOrder;
property TextColor;
property CustomThousandSeparator;
property OnChange;
property OnEnter;
property OnExit;
property OnKeyPress;
property OnMouseEnter;
property OnMouseExit;
property OnMouseMove;
end;
TfpgEditFloat = class(TfpgBaseNumericEdit)
private
FFixedDecimals: boolean;
protected
function GetValue: extended; virtual;
procedure SetValue(const AValue: extended); virtual;
procedure SetDecimals(const AValue: integer);
procedure SetFixedDecimals(const AValue: boolean);
procedure HandleKeyChar(var AText: TfpgChar; var shiftstate: TShiftState; var consumed: Boolean); override;
procedure HandleSetFocus; override;
procedure HandleKillFocus; override;
procedure HandlePaint; override;
public
constructor Create(AOwner: TComponent); override;
property OldColor;
property Text;
published
property Decimals: integer read FDecimals write SetDecimals default -1;
property CustomDecimalSeparator;
property FixedDecimals: boolean read FFixedDecimals write SetFixedDecimals default False;
property NegativeColor;
property ShowThousand default True;
property TabOrder;
property TextColor;
property CustomThousandSeparator;
property Value: extended read GetValue write SetValue;
property ParentShowHint;
property ShowHint;
property OnChange;
property OnEnter;
property OnExit;
property OnKeyPress;
property OnMouseEnter;
property OnMouseExit;
property OnMouseMove;
end;
TfpgEditCurrency = class(TfpgBaseNumericEdit)
protected
function GetValue: Currency; virtual;
procedure SetValue(const AValue: Currency); virtual;
procedure SetDecimals(AValue: integer);
procedure HandleKeyChar(var AText: TfpgChar; var shiftstate: TShiftState; var consumed: Boolean); override;
procedure HandleKeyPress(var keycode: word; var shiftstate: TShiftState; var consumed: Boolean); override;
procedure HandleSetFocus; override;
procedure HandleKillFocus; override;
procedure HandlePaint; override;
public
constructor Create(AOwner: TComponent); override;
property OldColor;
property Text;
published
property Decimals: integer read FDecimals write SetDecimals default 2;
property NegativeColor;
property CustomDecimalSeparator;
property CustomThousandSeparator;
property ShowThousand default True;
property Value: Currency read GetValue write SetValue;
property ParentShowHint;
property ShowHint;
property TabOrder;
property OnChange;
property OnEnter;
property OnExit;
property OnKeyPress;
property OnMouseEnter;
property OnMouseExit;
end;
function CreateEdit(AOwner: TComponent; x, y, w, h: TfpgCoord): TfpgEdit;
function CreateEditInteger(AOwner: TComponent; x, y, w, h: TfpgCoord;
AShowThousand: boolean= True): TfpgEditInteger;
function CreateEditFloat(AOwner: TComponent; x, y, w, h: TfpgCoord;
AShowThousand: boolean= True; ADecimals: Integer= -1; AFixedDecimals: boolean= False): TfpgEditFloat;
function CreateEditCurrency(AOwner: TComponent; x, y, w, h: TfpgCoord;
AShowThousand: boolean= True; ADecimals: Integer= 2): TfpgEditCurrency;
implementation
uses
fpg_stringutils,
fpg_constants,
fpg_hint;
const
// internal popupmenu item names
ipmCut = 'miDefaultCut';
ipmCopy = 'miDefaultCopy';
ipmPaste = 'miDefaultPaste';
ipmClearAll = 'miDefaultClearAll';
function CreateEdit(AOwner: TComponent; x, y, w, h: TfpgCoord): TfpgEdit;
begin
Result := TfpgEdit.Create(AOwner);
Result.Left := x;
Result.Top := y;
if w > 0 then
Result.Width := w;
if h < TfpgEdit(Result).FFont.Height + 6 then
Result.Height:= TfpgEdit(Result).FFont.Height + 6
else
Result.Height:= h;
end;
function CreateEditInteger(AOwner: TComponent; x, y, w, h: TfpgCoord; AShowThousand: boolean= True): TfpgEditInteger;
begin
Result := TfpgEditInteger.Create(AOwner);
Result.Left := x;
Result.Top := y;
Result.Width := w;
Result.ShowThousand:= AShowThousand;
if h < TfpgEditInteger(Result).FFont.Height + 6 then
Result.Height:= TfpgEditInteger(Result).FFont.Height + 6
else
Result.Height:= h;
end;
function CreateEditFloat(AOwner: TComponent; x, y, w, h: TfpgCoord; AShowThousand: boolean= True;
ADecimals: Integer= -1; AFixedDecimals: boolean= False): TfpgEditFloat;
begin
Result := TfpgEditFloat.Create(AOwner);
Result.Left := x;
Result.Top := y;
Result.Width := w;
Result.ShowThousand:= AShowThousand;
Result.Decimals := ADecimals;
Result.FFixedDecimals:= AFixedDecimals;
if h < TfpgEditFloat(Result).FFont.Height + 6 then
Result.Height:= TfpgEditFloat(Result).FFont.Height + 6
else
Result.Height:= h;
end;
function CreateEditCurrency(AOwner: TComponent; x, y, w, h: TfpgCoord; AShowThousand: boolean= True;
ADecimals: Integer= 2): TfpgEditCurrency;
begin
Result := TfpgEditCurrency.Create(AOwner);
Result.Left := x;
Result.Top := y;
Result.Width := w;
Result.ShowThousand:= AShowThousand;
Result.Decimals := ADecimals;
if h < TfpgEditCurrency(Result).FFont.Height + 6 then
Result.Height:= TfpgEditCurrency(Result).FFont.Height + 6
else
Result.Height:= h;
end;
{ TfpgBaseEdit }
procedure TfpgBaseEdit.Adjust(UsePxCursorPos: boolean = false);
begin
AdjustTextOffset(False);
AdjustDrawingInfo;
end;
procedure TfpgBaseEdit.AdjustTextOffset(UsePxCursorPos: boolean);
{If UsePxCursorPos then determines FCursorPos from FCursorPx (that holds mouse pointer coordinates)
Calculates exact FCursorPx (relative to the widget bounding box) from FCursorPos
Calculates FTextOffset based on FCursorPx}
var
dtext: string;
ch: string; // current character
chnum: integer; // its ordinal number
chx: integer; // its X position relative to widget
bestchx: integer; // chx, nearest to the mouse position (indicated by FCursorPx if UsePxCursorPos = True)
tw: integer; // total characters width, that becomes FCursorPx relative to the beginning of the text
ptw: integer;
dpos: integer; // helps to pass through an utf-8 string quickly
VisibleWidth: integer; // width of the edit field minus side margins
begin
if UsePxCursorPos then
begin
if FCursorPx > 0 then // bestchx < chx minimum
bestchx := Low(chx) + 1 + FCursorPx
else // bestchx > chx maximum
bestchx := High(chx) - 1 + FCursorPx;
end else
FCursorPx := 0;
dtext := GetDrawText;
ch := '';
chnum := 0;
tw := 0;
dpos := 0;
while dpos <= Length(dtext) do
begin
dpos := UTF8CharAtByte(dtext, dpos, ch);
ptw := tw;
tw := tw + FFont.TextWidth(ch);
chx := tw - FTextOffset + FSideMargin;
if UsePxCursorPos then
begin
if abs(chx - FCursorPx) < abs(bestchx - FCursorPx) then
begin
bestchx := chx;
FCursorPos := chnum;
end else
begin
tw := ptw;
break;
end;
end else
begin
if chnum >= FCursorPos then
break;
end;
Inc(chnum);
end;
VisibleWidth := (FWidth - 2 * FSideMargin);
if tw - FTextOffset > VisibleWidth - 2 then
FTextOffset := tw - VisibleWidth + 2
else if tw - FTextOffset < 0 then
begin
FTextOffset := tw;
if tw <> 0 then
Dec(FTextOffset, 2);
end;
FCursorPx := tw - FTextOffset + FSideMargin;
end;
procedure TfpgBaseEdit.AdjustDrawingInfo;
// Calculates FVisSelStartPx, FVisSelEndPx, FVisibleText, FDrawOffset
var
vtstartbyte, vtendbyte: integer; // visible characters' start/end in utf-8 string, bytes
bestfx, bestlx: integer;
dtext: string;
ch: string; // current character
chnum: integer; // its ordinal number
chx: integer; // its X position relative to widget
tw: integer; // total characters width, that becomes FCursorPx relative to the beginning of the text
ptw: integer; // total width on the previous step
dpos: integer; // helps to pass through an utf-8 string quickly
pdp: integer; // dpos on the previous step
vstart, vend: integer; // visible area start and end, pixels
slstart, slend: integer; // selection start and end, pixels
begin
vstart := FSideMargin;
vend := FWidth - FSideMargin;
if FSelOffset > 0 then
begin
slstart := FSelStart;
slend := FSelStart + FSelOffset;
end else
begin
slstart := FSelStart + FSelOffset;
slend := FSelStart;
end;
FVisSelStartPx := vend; // because we stop the search
FVisSelEndPx := vend; // after last visible character is found
bestfx := Low(chx) + 1 + vstart;
bestlx := Low(chx) + 1 + vend;
dtext := GetDrawText;
ch := '';
chnum := 0;
tw := 0;
dpos := 0;
FDrawOffset := 0;
while dpos <= Length(dtext) do
begin
pdp := dpos;
dpos := UTF8CharAtByte(dtext, dpos, ch);
ptw := tw;
tw := tw + FFont.TextWidth(ch);
chx := tw - FTextOffset + FSideMargin;
// calculate selection-related fields
if chnum = slstart then
FVisSelStartPx := chx;
if chnum = slend then
FVisSelEndPx := chx;
// search for the first/last visible characters
if abs(chx - vstart) < abs(bestfx - vstart) then
begin
bestfx := chx;
vtstartbyte := pdp;
FDrawOffset := ptw;
end;
// in small edit field the same character can be both the first and the last, so no 'else' allowed
if abs(chx - vend) < abs(bestlx - vend) then
begin
bestlx := chx;
vtendbyte := UTF8CharAtByte(dtext, dpos, ch); // plus one more character
end else
break; // we can safely break after last visible character is found
Inc(chnum);
end;
if FVisSelStartPx < vstart then
FVisSelStartPx := vstart;
if FVisSelEndPx > vend then
FVisSelEndPx := vend;
// FVisibleText := UTF8Copy(dtext, fvc, lvc - fvc + 2);
FVisibleText := Copy(dtext, vtstartbyte, vtendbyte - vtstartbyte);
FDrawOffset := FTextOffset - FDrawOffset;
end;
{function TfpgBaseEdit.PointToCharPos(x, y: integer): integer;
var
n: integer;
cx: integer; // character X position
bestcx: integer;
dtext: string;
tw, dpos: integer;
ch: string;
begin
ch := '';
dtext := GetDrawText;
if x > 0 then // bestcx < cx minimum
bestcx := Low(cx) + 1 + x
else // bestcx > cx maximum
bestcx := High(cx) - 1 + x;
tw := 0;
dpos := 0;
n := 0;
Result := n;
// searching the appropriate character position
while dpos <= Length(dtext) do
begin
dpos := UTF8CharAtByte(dtext, dpos, ch);
tw := tw + FFont.TextWidth(ch);
cx := tw - FTextOffset + FSideMargin;
if abs(cx - x) < abs(bestcx - x) then
begin
bestcx := cx;
Result := n;
end else
Exit; //==>
Inc(n);
end;
end;}
procedure TfpgBaseEdit.SetBorderStyle(const AValue: TfpgEditBorderStyle);
begin
if FBorderStyle = AValue then
Exit; //==>
FBorderStyle := AValue;
RePaint;
end;
procedure TfpgBaseEdit.SetHideSelection(const AValue: Boolean);
begin
if FHideSelection = AValue then
Exit;
FHideSelection := AValue;
end;
procedure TfpgBaseEdit.HandlePaint;
var
r: TfpgRect;
// paint selection rectangle
procedure DrawSelection;
var
lcolor: TfpgColor;
r: TfpgRect;
begin
if Focused then
begin
lcolor := clSelection;
Canvas.SetTextColor(clSelectionText);
end
else
begin
lcolor := clInactiveSel;
Canvas.SetTextColor(clText1);
end;
r.SetRect(FVisSelStartPx, 3, FVisSelEndPx - FVisSelStartPx, FFont.Height);
Canvas.SetColor(lcolor);
Canvas.FillRectangle(r);
Canvas.SetTextColor(clWhite);
Canvas.AddClipRect(r);
fpgStyle.DrawString(Canvas, -FDrawOffset + FSideMargin, 3, FVisibleText, Enabled);
Canvas.ClearClipRect;
end;
begin
Canvas.ClearClipRect;
r.SetRect(0, 0, Width, Height);
case BorderStyle of
ebsNone:
begin
// do nothing
end;
ebsDefault:
begin
Canvas.DrawControlFrame(r);
InflateRect(r, -2, -2);
end;
ebsSingle:
begin
Canvas.SetColor(clShadow2);
Canvas.DrawRectangle(r);
InflateRect(r, -1, -1);
end;
end;
Canvas.SetClipRect(r);
if Enabled then
Canvas.SetColor(FBackgroundColor)
else
Canvas.SetColor(clWindowBackground);
Canvas.FillRectangle(r);
Canvas.SetFont(FFont);
Canvas.SetTextColor(FTextColor);
fpgStyle.DrawString(Canvas, -FDrawOffset + FSideMargin, 3, FVisibleText, Enabled);
if Focused then
begin
// drawing selection
if FSelOffset <> 0 then
DrawSelection;
// drawing cursor
fpgCaret.SetCaret(Canvas, FCursorPx, 3, fpgCaret.Width, FFont.Height);
end
else
begin
// drawing selection
if (AutoSelect = False) and (FSelOffset <> 0) and (HideSelection = False) then
DrawSelection;
fpgCaret.UnSetCaret(Canvas);
end;
end;
procedure TfpgBaseEdit.HandleResize(awidth, aheight: TfpgCoord);
begin
inherited HandleResize(awidth, aheight);
AdjustDrawingInfo;
end;
procedure TfpgBaseEdit.HandleKeyChar(var AText: TfpgChar;
var shiftstate: TShiftState; var consumed: Boolean);
var
s: TfpgChar;
prevval: string;
begin
prevval := Text;
s := AText;
if not consumed then
begin
// Handle only printable characters
// UTF-8 characters beyond ANSI range are supposed to be printable
if ((Ord(AText[1]) > 31) and (Ord(AText[1]) < 127)) or (Length(AText) > 1) then
begin
if (FMaxLength <= 0) or (UTF8Length(FText) < FMaxLength) then
begin
DeleteSelection;
UTF8Insert(s, FText, FCursorPos + 1);
Inc(FCursorPos);
FSelStart := FCursorPos;
Adjust;
end;
consumed := True;
end;
if prevval <> Text then
DoOnChange;
end;
if consumed then
RePaint;
inherited HandleKeyChar(AText, shiftstate, consumed);
end;
procedure TfpgBaseEdit.HandleKeyPress(var keycode: word;
var shiftstate: TShiftState; var consumed: boolean);
var
hasChanged: boolean;
procedure StopSelection;
begin
FSelStart := FCursorPos;
FSelOffset := 0;
end;
begin
hasChanged := False;
fpgApplication.HideHint;
Consumed := True;
case CheckClipBoardKey(keycode, shiftstate) of
ckCopy:
begin
DoCopy;
end;
ckPaste:
begin
DoPaste;
hasChanged := True;
end;
ckCut:
begin
DoCopy;
DeleteSelection;
Adjust;
hasChanged := True;
end;
else
Consumed := False;
end;
if not Consumed then
begin
// checking for movement keys:
case keycode of
keyLeft:
if FCursorPos > 0 then
begin
consumed := True;
Dec(FCursorPos);
if (ssCtrl in shiftstate) then
// word search...
// while (FCursorPos > 0) and not ptkIsAlphaNum(copy(FText,FCursorPos,1))
// do Dec(FCursorPos);
// while (FCursorPos > 0) and ptkIsAlphaNum(copy(FText,FCursorPos,1))
// do Dec(FCursorPos);
;
end;
keyRight:
if FCursorPos < UTF8Length(FText) then
begin
consumed := True;
Inc(FCursorPos);
if (ssCtrl in shiftstate) then
// word search...
// while (FCursorPos < Length(FText)) and ptkIsAlphaNum(copy(FText,FCursorPos+1,1))
// do Inc(FCursorPos);
// while (FCursorPos < Length(FText)) and not ptkIsAlphaNum(copy(FText,FCursorPos+1,1))
// do Inc(FCursorPos);
;
end;
keyHome:
begin
consumed := True;
FCursorPos := 0;
end;
keyEnd:
begin
consumed := True;
FCursorPos := UTF8Length(FText);
end;
end;
if Consumed then
begin
FSelecting := (ssShift in shiftstate);
if FSelecting then
FSelOffset := FCursorPos - FSelStart
else
StopSelection;
Adjust;
end;
end; // movement key checking
if not Consumed then
begin
consumed := True;
case keycode of
keyBackSpace:
begin
if FCursorPos > 0 then
begin
UTF8Delete(FText, FCursorPos, 1);
Dec(FCursorPos);
hasChanged := True;
end;// backspace
end;
keyDelete:
begin
if FSelOffset <> 0 then
DeleteSelection
else if FCursorPos < UTF8Length(FText) then
UTF8Delete(FText, FCursorPos + 1, 1);
hasChanged := True;
end;
else
Consumed := False;
end;
if Consumed then
begin
StopSelection;
Adjust;
end;
end; { if }
if consumed then
RePaint
else
inherited;
if hasChanged then
if Assigned(FOnChange) then
FOnChange(self);
end;
procedure TfpgBaseEdit.HandleLMouseDown(x, y: integer; shiftstate: TShiftState);
begin
fpgApplication.HideHint;
inherited HandleLMouseDown(x, y, shiftstate);
FCursorPx := x;
AdjustTextOffset(True);
FMouseDragPos := FCursorPos;
if (ssShift in shiftstate) then
FSelOffset := FCursorPos - FSelStart
else
begin
FSelStart := FCursorPos;
FSelOffset := 0;
end;
AdjustDrawingInfo;
RePaint;
end;
procedure TfpgBaseEdit.HandleRMouseUp(x, y: integer; shiftstate: TShiftState);
begin
inherited HandleRMouseUp(x, y, shiftstate);
if Assigned(PopupMenu) then
PopupMenu.ShowAt(self, x, y)
else
ShowDefaultPopupMenu(x, y, ShiftState);
end;
procedure TfpgBaseEdit.HandleMouseMove(x, y: integer; btnstate: word; shiftstate: TShiftState);
var
cp: integer;
begin
if (btnstate and MOUSE_LEFT) = 0 then // Left button not down
begin
inherited HandleMouseMove(x, y, btnstate, shiftstate);
Exit; //==>
end;
cp := FCursorPos;
FCursorPx := x;
AdjustTextOffset(True);
if FCursorPos <> cp then
begin
FSelOffset := FCursorPos - FSelStart;
AdjustDrawingInfo;
Repaint;
end;
end;
procedure TfpgBaseEdit.HandleDoubleClick(x, y: integer; button: word; shiftstate: TShiftState);
begin
// button is always Mouse_Left, but lets leave this test here for good measure
if button = MOUSE_LEFT then
SelectAll
else
inherited;
end;
procedure TfpgBaseEdit.HandleMouseEnter;
begin
inherited HandleMouseEnter;
if (csDesigning in ComponentState) then
Exit;
if Enabled then
MouseCursor := mcIBeam;
end;
procedure TfpgBaseEdit.HandleMouseExit;
begin
inherited HandleMouseExit;
if (csDesigning in ComponentState) then
Exit;
MouseCursor := mcDefault;
end;
procedure TfpgBaseEdit.HandleSetFocus;
begin
inherited HandleSetFocus;
if AutoSelect then
SelectAll;
end;
procedure TfpgBaseEdit.HandleKillFocus;
begin
inherited HandleKillFocus;
if AutoSelect then
FSelOffset := 0;
end;
function TfpgBaseEdit.GetDrawText: string;
begin
if not PassWordMode then
Result := FText
else
Result := StringOfChar('*', UTF8Length(FText));
end;
constructor TfpgBaseEdit.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FFont := fpgGetFont('#Edit1'); // owned object !
Focusable := True;
FHeight := FFont.Height + 6;
FWidth := 120;
FTextColor := Parent.TextColor;
FBackgroundColor := clBoxColor;
FAutoSelect := True;
FSelecting := False;
FHideSelection := True;
FSideMargin := 3;
FMaxLength := 0; // no limit
FText := '';
FCursorPos := UTF8Length(FText);
FSelStart := FCursorPos;
FSelOffset := 0;
FTextOffset := 0;
FPasswordMode := False;
FBorderStyle := ebsDefault;
FPopupMenu := nil;
FDefaultPopupMenu := nil;
FOnChange := nil;
end;
destructor TfpgBaseEdit.Destroy;
begin
if Assigned(FDefaultPopupMenu) then
FDefaultPopupMenu.Free;
FFont.Free;
inherited Destroy;
end;
function TfpgBaseEdit.SelectionText: string;
begin
if FSelOffset <> 0 then
begin
if FSelOffset < 0 then
Result := UTF8Copy(FText, 1 + FSelStart + FSelOffset, -FSelOffset)
else
begin
Result := UTF8Copy(FText, 1 + FSelStart, FSelOffset);
end;
end
else
Result := '';
end;
procedure TfpgBaseEdit.SetPasswordMode (const AValue: boolean );
begin
if FPasswordMode = AValue then
Exit; //==>
FPasswordMode := AValue;
Adjust;
RePaint;
end;
function TfpgBaseEdit.GetFontDesc: string;
begin
Result := FFont.FontDesc;
end;
procedure TfpgBaseEdit.SetFontDesc(const AValue: string);
begin
FFont.Free;
FFont := fpgGetFont(AValue);
if Height < FFont.Height + 6 then
Height:= FFont.Height + 6;
Adjust;
RePaint;
end;
procedure TfpgBaseEdit.SetText(const AValue: string);
var
s: string;
prevval: TfpgString;
begin
if FText = AValue then
Exit;
prevval := FText;
if FMaxLength <> 0 then
begin
if UTF8Length(FText) > FMaxLength then
s := UTF8Copy(AValue, 1, FMaxLength)
else
s := AValue;
end
else
s := AValue;
FText := s;
FCursorPos := UTF8Length(FText);
FSelStart := FCursorPos;
FSelOffset := 0;
FTextOffset := 0;
Adjust;
RePaint;
if prevval <> Text then
DoOnChange;
end;
procedure TfpgBaseEdit.DefaultPopupCut(Sender: TObject);
begin
CutToClipboard;
end;
procedure TfpgBaseEdit.DefaultPopupCopy(Sender: TObject);
begin
CopyToClipboard;
end;
procedure TfpgBaseEdit.DefaultPopupPaste(Sender: TObject);
begin
PasteFromClipboard
end;
procedure TfpgBaseEdit.DefaultPopupClearAll(Sender: TObject);
begin
Clear;
end;
procedure TfpgBaseEdit.SetDefaultPopupMenuItemsState;
var
i: integer;
itm: TfpgMenuItem;
begin
for i := 0 to FDefaultPopupMenu.ComponentCount-1 do
begin
if FDefaultPopupMenu.Components[i] is TfpgMenuItem then
begin
itm := TfpgMenuItem(FDefaultPopupMenu.Components[i]);
// enabled/disable menu items
if itm.Name = ipmCut then
itm.Enabled := FSelOffset <> 0
else if itm.Name = ipmCopy then
itm.Enabled := FSelOffset <> 0
else if itm.Name = ipmPaste then
itm.Enabled := fpgClipboard.Text <> ''
else if itm.Name = ipmClearAll then
itm.Enabled := Text <> '';
end;
end;
end;
procedure TfpgBaseEdit.DoOnChange;
begin
if Assigned(FOnChange) then
FOnChange(self);
end;
procedure TfpgBaseEdit.ShowDefaultPopupMenu(const x, y: integer;
const shiftstate: TShiftState);
var
itm: TfpgMenuItem;
begin
if not Assigned(FDefaultPopupMenu) then
begin
{ todo: This text needs to be localized }
FDefaultPopupMenu := TfpgPopupMenu.Create(nil);
itm := FDefaultPopupMenu.AddMenuItem(rsCut, '', @DefaultPopupCut);
itm.Name := ipmCut;
itm := FDefaultPopupMenu.AddMenuItem(rsCopy, '', @DefaultPopupCopy);
itm.Name := ipmCopy;
itm := FDefaultPopupMenu.AddMenuItem(rsPaste, '', @DefaultPopupPaste);
itm.Name := ipmPaste;
itm := FDefaultPopupMenu.AddMenuItem(rsDelete, '', @DefaultPopupClearAll);
itm.Name := ipmClearAll;
end;
SetDefaultPopupMenuItemsState;
FDefaultPopupMenu.ShowAt(self, x, y);
end;
procedure TfpgBaseEdit.DeleteSelection;
var
prevval: TfpgString;
begin
prevval := FText;
if FSelOffset <> 0 then
begin
if FSelOffset < 0 then
begin
UTF8Delete(FText, 1 + FSelStart + FSelOffset, -FSelOffset);
FCurSorPos := FSelStart + FSelOffset;
end
else
begin
UTF8Delete(FText, 1 + FSelStart, FSelOffset);
FCurSorPos := FSelStart;
end;
FSelOffset := 0;
FSelStart := FCursorPos;
end;
if prevval <> Text then
DoOnChange;
end;
procedure TfpgBaseEdit.DoCopy;
begin
if FSelOffset = 0 then
Exit; //==>
fpgClipboard.Text := SelectionText;
end;
procedure TfpgBaseEdit.DoPaste;
var
s: string;
prevval: TfpgString;
begin
prevval := FText;
DeleteSelection;
s := fpgClipboard.Text;
if (FMaxLength > 0) then
if UTF8Length(FText) + UTF8Length(s) > FMaxLength then
s := UTF8Copy(s, 1, FMaxLength - UTF8Length(FText)); // trim the clipboard text if needed
if UTF8Length(s) < 1 then
Exit; //==>
UTF8Insert(s, FText, FCursorPos + 1);
FCursorPos := FCursorPos + UTF8Length(s);
FSelStart := FCursorPos;
Adjust;
Repaint;
if prevval <> Text then
DoOnChange;
end;
procedure TfpgBaseEdit.SetAutoSelect(const AValue: Boolean);
begin
if FAutoSelect = AValue then
Exit; //==>
FAutoSelect := AValue;
end;
procedure TfpgBaseEdit.SelectAll;
begin
FSelecting := True;
FSelStart := 0;
FSelOffset := UTF8Length(FText);
FCursorPos := FSelOffset;
Adjust;
Repaint;
end;
procedure TfpgBaseEdit.Clear;
begin
Text := '';
end;
procedure TfpgBaseEdit.ClearSelection;
begin
DeleteSelection;
Adjust;
RePaint;
end;
procedure TfpgBaseEdit.CopyToClipboard;
begin
DoCopy;
end;
procedure TfpgBaseEdit.CutToClipboard;
begin
DoCopy;
DeleteSelection;
Adjust;
RePaint;
end;
function TfpgBaseEdit.GetClientRect: TfpgRect;
begin
case BorderStyle of
ebsNone: inherited GetClientRect;
ebsDefault: Result.SetRect(2, 2, Width-4, Height-4);
ebsSingle: Result.SetRect(1, 1, Width-2, Height-2);
end;
end;
procedure TfpgBaseEdit.PasteFromClipboard;
begin
DoPaste;
end;
{ TfpgBaseNumericEdit }
procedure TfpgBaseNumericEdit.AdjustTextOffset(UsePxCursorPos: boolean);
{If UsePxCursorPos then determines FCursorPos from FCursorPx (that holds mouse pointer coordinates)
Calculates exact FCursorPx (relative to the widget bounding box) from FCursorPos
Calculates FTextOffset based on FCursorPx}
var
dtext: string;
ch: string; // current character
chnum: integer; // its ordinal number
chx: integer; // its X position relative to widget
bestchx: integer; // chx, nearest to the mouse position (indicated by FCursorPx if UsePxCursorPos = True)
tw: integer; // total characters width, that becomes FCursorPx relative to the beginning of the text
ptw: integer;
dpos: integer; // helps to pass through an utf-8 string quickly
VisibleWidth: integer; // width of the edit field minus side margins
begin
if UsePxCursorPos then
begin
if FCursorPx > 0 then // bestchx < chx minimum
bestchx := Low(chx) + 1 + FCursorPx
else // bestchx > chx maximum
bestchx := High(chx) - 1 + FCursorPx;
end else
FCursorPx := 0;
dtext := GetDrawText;
ch := '';
chnum := 0;
tw := 0;
dpos := 0;
while dpos <= Length(dtext) do
begin
dpos := UTF8CharAtByte(dtext, dpos, ch);
ptw := tw;
tw := tw + FFont.TextWidth(ch);
case FAlignment of
taLeftJustify:
chx := tw - FTextOffset + FSideMargin;
taRightJustify:
chx := tw - FTextOffset - FSideMargin + Width - 2 - FFont.TextWidth(dtext);
end;
if UsePxCursorPos then
begin
if abs(chx - FCursorPx) < abs(bestchx - FCursorPx) then
begin
bestchx := chx;
FCursorPos := chnum;
end else
begin
tw := ptw;
break;
end;
end else
begin
if chnum >= FCursorPos then
break;
end;
Inc(chnum);
end;
VisibleWidth := (FWidth - 2 * FSideMargin);
if tw - FTextOffset > VisibleWidth - 2 then
FTextOffset := tw - VisibleWidth + 2
else if tw - FTextOffset < 0 then
begin
FTextOffset := tw;
if tw <> 0 then
Dec(FTextOffset, 2);
end;
case FAlignment of
taLeftJustify:
FCursorPx := tw - FTextOffset + FSideMargin;
taRightJustify:
FCursorPx := tw - FTextOffset - FSideMargin + Width - FFont.TextWidth(dtext);
end;
end;
procedure TfpgBaseNumericEdit.AdjustDrawingInfo;
// Calculates FVisSelStartPx, FVisSelEndPx, FVisibleText, FDrawOffset
var
vtstartbyte, vtendbyte: integer; // visible characters' start/end in utf-8 string, bytes
bestfx, bestlx: integer;
dtext: string;
ch: string; // current character
chnum: integer; // its ordinal number
chx: integer; // its X position relative to widget
tw: integer; // total characters width, that becomes FCursorPx relative to the beginning of the text
ptw: integer; // total width on the previous step
dpos: integer; // helps to pass through an utf-8 string quickly
pdp: integer; // dpos on the previous step
vstart, vend: integer; // visible area start and end, pixels
slstart, slend: integer; // selection start and end, pixels
begin
vstart := FSideMargin;
vend := FWidth - FSideMargin;
if FSelOffset > 0 then
begin
slstart := FSelStart;
slend := FSelStart + FSelOffset;
end else
begin
slstart := FSelStart + FSelOffset;
slend := FSelStart;
end;
FVisSelStartPx := vend; // because we stop the search
FVisSelEndPx := vend; // after last visible character is found
bestfx := Low(chx) + 1 + vstart;
bestlx := Low(chx) + 1 + vend;
dtext := GetDrawText;
ch := '';
chnum := 0;
tw := 0;
dpos := 0;
FDrawOffset := 0;
while dpos <= Length(dtext) do
begin
pdp := dpos;
dpos := UTF8CharAtByte(dtext, dpos, ch);
ptw := tw;
tw := tw + FFont.TextWidth(ch);
case FAlignment of
taLeftJustify:
chx := tw - FTextOffset + FSideMargin;
taRightJustify:
chx := tw - FTextOffset - FSideMargin + Width - 2 - FFont.TextWidth(dtext);
end;
// calculate selection-related fields
if chnum = slstart then
FVisSelStartPx := chx;
if chnum = slend then
FVisSelEndPx := chx;
// search for the first/last visible characters
if abs(chx - vstart) < abs(bestfx - vstart) then
begin
bestfx := chx;
vtstartbyte := pdp;
case FAlignment of
taLeftJustify:
FDrawOffset := ptw;
taRightJustify:
FDrawOffset := ptw + Width - 2 - FFont.TextWidth(dtext);
end;
end;
// in small edit field the same character can be both the first and the last, so no 'else' allowed
if abs(chx - vend) < abs(bestlx - vend) then
begin
bestlx := chx;
vtendbyte := UTF8CharAtByte(dtext, dpos, ch); // plus one more character
end else
break; // we can safely break after last visible character is found
Inc(chnum);
end;
if FVisSelStartPx < vstart then
FVisSelStartPx := vstart;
if FVisSelEndPx > vend then
FVisSelEndPx := vend;
// FVisibleText := UTF8Copy(dtext, fvc, lvc - fvc + 2);
FVisibleText := Copy(dtext, vtstartbyte, vtendbyte - vtstartbyte);
FDrawOffset := FTextOffset - FDrawOffset;
end;
procedure TfpgBaseNumericEdit.SetOldColor(const AValue: TfpgColor);
begin
if FOldColor=AValue then exit;
FOldColor:=AValue;
end;
procedure TfpgBaseNumericEdit.SetAlignment(const AValue: TAlignment);
begin
if FAlignment=AValue then exit;
FAlignment:=AValue;
end;
procedure TfpgBaseNumericEdit.SetDecimalSeparator(const AValue: TfpgChar);
begin
if FDecimalseparator=AValue then exit;
FDecimalseparator:=AValue;
end;
procedure TfpgBaseNumericEdit.SetNegativeColor(const AValue: TfpgColor);
begin
if FNegativeColor=AValue then exit;
FNegativeColor:=AValue;
end;
procedure TfpgBaseNumericEdit.SetThousandSeparator(const AValue: TfpgChar);
begin
if FThousandSeparator=AValue then exit;
FThousandSeparator:=AValue;
end;
procedure TfpgBaseNumericEdit.SetShowThousand;
var
i,long: integer;
txt, texte, decimal: string;
begin
if FDecimals > 0 then
begin
if Pos(FDecimalSeparator, fText) > 0 then
begin
txt := UTF8Copy(fText, 1, Pred(UTF8Pos(FDecimalSeparator, fText)));
if UTF8Length(fText)-UTF8Pos(FDecimalSeparator, fText) > FDecimals then
decimal := UTF8Copy(fText, Succ(UTF8Pos(FDecimalSeparator, fText)), FDecimals)
else
decimal := UTF8Copy(fText, Succ(UTF8Pos(FDecimalSeparator, fText)), UTF8Length(fText)-UTF8Pos(FDecimalSeparator, fText));
end
else
txt := fText;
end
else
begin
if FDecimals = 0 then
begin
if Pos(FDecimalSeparator, fText) > 0 then
txt := UTF8Copy(fText, 1, Pred(UTF8Pos(FDecimalSeparator, fText)))
else
txt := fText;
end
else
if Pos(FDecimalSeparator, fText) > 0 then
begin
txt := UTF8Copy(fText, 1, Pred(UTF8Pos(FDecimalSeparator, fText)));
decimal := UTF8Copy(fText, Succ(UTF8Pos(FDecimalSeparator, fText)), UTF8Length(fText)-UTF8Pos(FDecimalSeparator, fText));
end
else
txt := fText;
end;
if ShowThousand then
begin
if fText > '' then
if fText[1] = '-' then
txt:= UTF8Copy(txt, 2, UTF8Length(txt)-1);
long := UTF8Length(txt);
if long = 0 then
texte := ''
else
begin
for i := 1 to UTF8Length(txt) do
if fpgCharAt(txt, i) = FThousandSeparator then
begin
txt:= UTF8Copy(txt, 1, i - 1) + UTF8Copy(txt, i + 1, long - i);
dec(long);
end;
i := 0;
texte := '';
repeat
if i > 0 then
if ((i mod 3) = 0) and (fpgCharAt(txt,UTF8Length(txt)-UTF8Length(texte)) <> FThousandSeparator) then
begin
texte := FThousandSeparator + texte;
if fText[1] = '-' then
begin
if Pred(FCursorPos) <= UTF8Length(texte) then
Inc(FCursorPos);
end
else
if FCursorPos <= UTF8Length(texte) then
Inc(FCursorPos);
end;
texte := Copy(txt, long - i, 1) + texte;
inc(i);
until i = long;
end;
if fText > '' then
if fText[1] = '-' then
if UTF8Pos(FDecimalSeparator, fText) > 0 then
fText := '-' + texte + FDecimalSeparator + decimal
else
fText := '-' + texte
else
if UTF8Pos(FDecimalSeparator, fText) > 0 then
fText := texte + FDecimalSeparator + decimal
else
fText := texte + decimal;
end;
end;
procedure TfpgBaseNumericEdit.Justify;
begin
//based on Alignment property this method will align the derived edit correctly.
end;
procedure TfpgBaseNumericEdit.HandlePaint;
var
x: TfpgCoord;
r: TfpgRect;
// paint selection rectangle
procedure DrawSelection;
var
lcolor: TfpgColor;
r: TfpgRect;
begin
if Focused then
begin
lcolor := clSelection;
Canvas.SetTextColor(clSelectionText);
end
else
begin
lcolor := clInactiveSel;
Canvas.SetTextColor(clText1);
end;
r.SetRect(FVisSelStartPx, 3, FVisSelEndPx - FVisSelStartPx, FFont.Height);
Canvas.SetColor(lcolor);
Canvas.FillRectangle(r);
Canvas.SetTextColor(clWhite);
Canvas.AddClipRect(r);
fpgStyle.DrawString(Canvas, -FDrawOffset - FSideMargin, 3, FVisibleText, Enabled);
Canvas.ClearClipRect;
end;
begin
if Alignment = taRightJustify then
begin
inherited HandlePaint;
r := GetClientRect;
Canvas.SetClipRect(r);
Canvas.Clear(BackgroundColor);
Canvas.SetFont(Font);
Canvas.SetTextColor(TextColor);
x := r.Right - Font.TextWidth(Text) - 1; // 1 is the spacing from client edge
Canvas.DrawString(x,r.Top+1,Text);
if Focused then
begin
// drawing selection
if FSelOffset <> 0 then
DrawSelection;
fpgCaret.SetCaret(Canvas, FCursorPx - FSideMargin, r.Top+1, fpgCaret.Width, Font.Height);
end;
end
else
inherited;
end;
procedure TfpgBaseNumericEdit.FormatEdit;
begin
SetShowThousand;
// Colour negative number
if LeftStr(Text,1) = '-' then
TextColor := NegativeColor
else
TextColor := OldColor;
end;
constructor TfpgBaseNumericEdit.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FAlignment := taRightJustify;
FDecimalSeparator := DecimalSeparator;
FThousandSeparator := ThousandSeparator;
NegativeColor := clRed;
OldColor := TextColor;
end;
{ TfpgEditInteger }
function TfpgEditInteger.GetValue: integer;
var
txt: string;
begin
if ShowThousand then
begin
if Copy(fText, 1, 1) = '-' then
txt := Copy(ftext, 2, Length(fText) - 1)
else
txt := fText;
while UTF8Pos(FThousandSeparator, txt) > 0 do
txt := UTF8Copy(txt, 1, Pred(UTF8Pos(FThousandSeparator, txt)))
+UTF8Copy(txt, Succ(UTF8Pos(FThousandSeparator, txt)), Length(txt) - UTF8Pos(FThousandSeparator, txt));
if UTF8Copy(fText, 1, 1) = '-' then
fText := '-' + txt
else
fText := txt;
end;
if fText = '-' then
begin
Result := 0;
Text := fText;
end
else
begin
if Text <> '' then
begin
try
Result := StrToInt(fText);
except
on E: EConvertError do
begin
Result := 0;
Text := '';
Invalidate;
end;
end;
end
else
Result := 0;
end;
end;
procedure TfpgEditInteger.SetValue(const AValue: integer);
begin
try
Text := IntToStr(AValue);
FormatEdit;
except
on E: EConvertError do
Text := '';
end;
end;
procedure TfpgEditInteger.HandleKeyChar(var AText: TfpgChar;
var shiftstate: TShiftState; var consumed: Boolean);
var
n: integer;
begin
n := Ord(AText[1]);
if ((n >= 48) and (n <= 57) or (AText = '-') and (UTF8Pos(AText, Text) <= 0)) then
consumed := False
else
consumed := True;
inherited HandleKeyChar(AText, shiftstate, consumed);
end;
procedure TfpgEditInteger.HandleSetFocus;
begin
try
if GetValue = 0 then
Text := ''
else
Text := IntToStr(GetValue);
except
on E: EConvertError do
Text := '';
end;
inherited HandleSetFocus;
end;
procedure TfpgEditInteger.HandleKillFocus;
begin
try
Text := IntToStr(GetValue);
FormatEdit;
except
on E: EConvertError do
Text := '';
end;
inherited HandleKillFocus;
end;
procedure TfpgEditInteger.HandlePaint;
begin
inherited HandlePaint;
// To make it more visible in the UI Designer
if csDesigning in ComponentState then
begin
Canvas.SetTextColor(clInactiveWgFrame);
Canvas.DrawString(2, 3, '<Int>');
end;
end;
constructor TfpgEditInteger.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FShowThousand := True;
FDecimals := 0;
end;
{ TfpgEditFloat }
function TfpgEditFloat.GetValue: extended;
var
txt: string;
begin
if FDecimals > 0 then
begin
if UTF8Pos(FDecimalSeparator, fText) > 0 then
if UTF8Length(fText)-UTF8Pos(FDecimalSeparator, fText) > FDecimals then
fText := UTF8Copy(fText, 1, UTF8Length(fText) - 1);
end
else
if FDecimals = 0 then
if UTF8Pos(FDecimalSeparator, fText) > 0 then
fText := UTF8Copy(fText, 1, UTF8Length(fText) - 1);
if ShowThousand then
begin
if Copy(fText, 1, 1) = '-' then // No need for utf8 version here
txt := Copy(ftext, 2, Length(fText) - 1)
else
txt := fText;
while UTF8Pos(FThousandSeparator, txt) > 0 do
txt := UTF8Copy(txt, 1, Pred(UTF8Pos(FThousandSeparator, txt)))
+UTF8Copy(txt, Succ(UTF8Pos(FThousandSeparator, txt)), UTF8Length(txt) - UTF8Pos(FThousandSeparator, txt));
if Copy(fText, 1, 1) = '-' then // No need for utf8 version here
fText := '-' + txt
else
fText := txt;
end;
if fText = '-' then
begin
Result := 0;
Text := fText;
end
else
begin
if fText <> '' then
begin
try
Result := StrToFloat(fText);
except
on E: EConvertError do
begin
Result := 0;
Text := '';
Invalidate;
end;
end; { try..except }
end
else
Result := 0;
end;
end;
procedure TfpgEditFloat.SetValue(const AValue: extended);
begin
try
if FFixedDecimals then
Text := FloatToStrF(AValue, ffFixed, 18, FDecimals)
else
Text := FloatToStr(AValue);
FormatEdit;
except
on E: EConvertError do
Text := '';
end;
end;
procedure TfpgEditFloat.SetDecimals(const AValue: integer);
begin
if AValue < -1 then
Exit; // =>
if FDecimals <> AValue then
FDecimals := AValue
end;
procedure TfpgEditFloat.SetFixedDecimals(const AValue: boolean);
begin
if FFixedDecimals <> AValue then
FFixedDecimals := AValue;
end;
procedure TfpgEditFloat.HandleKeyChar(var AText: TfpgChar;
var shiftstate: TShiftState; var consumed: Boolean);
var
n: integer;
begin
n := Ord(AText[1]);
if ((n >= 48) and (n <= 57) or (AText = '-') and (UTF8Pos(AText, Text) <= 0))
or ((AText = FDecimalSeparator) and (UTF8Pos(AText, Text) <= 0)) then
consumed := False
else
consumed := True;
inherited HandleKeyChar(AText, shiftstate, consumed);
end;
procedure TfpgEditFloat.HandleSetFocus;
begin
try
if GetValue = 0 then
Text := ''
else
begin
if FFixedDecimals then
Text := FloatToStrF(GetValue, ffFixed, 18, FDecimals)
else
Text := FloatToStr(GetValue);
end;
except
on E: EConvertError do
Text := '';
end;
inherited HandleSetFocus;
end;
procedure TfpgEditFloat.HandleKillFocus;
begin
try
if FFixedDecimals then
Text := FloatToStrF(GetValue, ffFixed, 18, FDecimals)
else
Text := FloatToStr(GetValue);
FormatEdit;
except
on E: EConvertError do
Text := '';
end;
inherited HandleKillFocus;
end;
procedure TfpgEditFloat.HandlePaint;
begin
inherited HandlePaint;
// To make it more visible in the UI Designer
if csDesigning in ComponentState then
begin
Canvas.SetTextColor(clInactiveWgFrame);
Canvas.DrawString(2, 3, '<Float>');
end;
end;
constructor TfpgEditFloat.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FDecimals := -1;
FFixedDecimals := False;
FShowThousand := True;
end;
{ TfpgEditCurrency }
function TfpgEditCurrency.GetValue: Currency;
var
txt: string;
begin
if FDecimals > 0 then
if UTF8Pos(FDecimalSeparator, fText) > 0 then
if UTF8Length(fText)-UTF8Pos(FDecimalSeparator, fText) > FDecimals then
fText := UTF8Copy(fText, 1, UTF8Length(fText) - 1);
if ShowThousand then
begin
if Copy(fText, 1, 1) = '-' then
txt := Copy(ftext, 2, Length(fText) - 1)
else
txt := fText;
while UTF8Pos(FThousandSeparator, txt) > 0 do
txt := UTF8Copy(txt, 1, Pred(UTF8Pos(FThousandSeparator, txt)))
+UTF8Copy(txt, Succ(UTF8Pos(FThousandSeparator, txt)), UTF8Length(txt) - UTF8Pos(FThousandSeparator, txt));
if Copy(fText, 1, 1) = '-' then
fText := '-' + txt
else
fText := txt;
end;
if fText = '-' then
begin
Result := 0;
Text:= fText;
end
else
if fText > '' then
try
Result := StrToCurr(fText);
except
on E: EConvertError do
begin
Result := 0;
Text := '';
Invalidate;
end;
end
else
Result := 0;
end;
procedure TfpgEditCurrency.SetValue(const AValue: Currency);
begin
try
Text := FloatToStrF(AValue, ffFixed, -1, FDecimals);
FormatEdit;
except
on E: EConvertError do
Text := '';
end;
end;
procedure TfpgEditCurrency.SetDecimals(AValue: integer);
begin
if (AValue < 0) or (AValue > 4) then
Exit; // =>
if FDecimals <> AValue then
FDecimals := AValue
end;
procedure TfpgEditCurrency.HandleKeyPress(var keycode: word; var shiftstate: TShiftState; var consumed: Boolean);
begin
case keycode of
keyReturn, keyPEnter, keyTab:
if FDecimals > 0 then
begin
if Pos(FDecimalSeparator, fText) = 0 then
begin
fText := fText + FDecimalSeparator;
Inc(FCursorPos);
end;
if UTF8Length(fText)-UTF8Pos(FDecimalSeparator, fText) < FDecimals then
while UTF8Length(fText)-UTF8Pos(FDecimalSeparator, fText) < FDecimals do
begin
fText := fText + '0';
Inc(FCursorPos);
end;
end;
end;
inherited HandleKeyPress(keycode,shiftstate,consumed);
end;
procedure TfpgEditCurrency.HandleKeyChar(var AText: TfpgChar;
var shiftstate: TShiftState; var consumed: Boolean);
var
n: integer;
begin
n := Ord(AText[1]);
if ((n >= 48) and (n <= 57) or (AText = '-') and (UTF8Pos(AText, Text) <= 0))
or ((AText = FDecimalSeparator) and (UTF8Pos(AText, Text) <= 0)) then
consumed := False
else
consumed := True;
inherited HandleKeyChar(AText, shiftstate, consumed);
end;
procedure TfpgEditCurrency.HandleSetFocus;
begin
try
if GetValue = 0 then
Text := ''
else
Text := FloatToStrF(GetValue, ffFixed, -1, FDecimals);
except
on E: EConvertError do
Text := '';
end;
inherited HandleSetFocus;
end;
procedure TfpgEditCurrency.HandleKillFocus;
begin
try
Text := FloatToStrF(GetValue, ffFixed, -1, FDecimals);
FormatEdit;
except
on E: EConvertError do
Text := '';
end;
inherited HandleKillFocus;
end;
procedure TfpgEditCurrency.HandlePaint;
begin
inherited HandlePaint;
// To make it more visible in the UI Designer
if csDesigning in ComponentState then
begin
Canvas.SetTextColor(clInactiveWgFrame);
Canvas.DrawString(2, 3, '<Curr>');
end;
end;
constructor TfpgEditCurrency.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FDecimals := 2;
FShowThousand := True;
end;
end.
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