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vargrid.pas
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{*************************************************************************************
This file is part of Transmission Remote GUI.
Copyright (c) 2008-2014 by Yury Sidorov.
Transmission Remote GUI is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Transmission Remote GUI 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. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Transmission Remote GUI; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*************************************************************************************}
unit VarGrid;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, Grids, VarList, Graphics, Controls, LMessages, Forms, StdCtrls, LCLType, ExtCtrls;
type
TVarGrid = class;
TCellOption = (coDrawCheckBox, coDrawTreeButton);
TCellOptions = set of TCellOption;
TCellAttributes = record
Text: string;
ImageIndex: integer;
Indent: integer;
Options: TCellOptions;
State: TCheckBoxState;
Expanded: boolean;
end;
TOnCellAttributes = procedure (Sender: TVarGrid; ACol, ARow, ADataCol: integer; AState: TGridDrawState; var CellAttribs: TCellAttributes) of object;
TOnDrawCellEvent = procedure (Sender: TVarGrid; ACol, ARow, ADataCol: integer; AState: TGridDrawState; const R: TRect; var ADefaultDrawing: boolean) of object;
TOnSortColumnEvent = procedure (Sender: TVarGrid; var ASortCol: integer) of object;
TCellNotifyEvent = procedure (Sender: TVarGrid; ACol, ARow, ADataCol: integer) of object;
TOnQuickSearch = procedure (Sender: TVarGrid; var SearchText: string; var ARow: integer) of object;
{ TVarGridStringEditor }
TVarGridStringEditor = class(TStringCellEditor)
protected
procedure msg_SetGrid(var Msg: TGridMessage); message GM_SETGRID;
procedure msg_SetBounds(var Msg: TGridMessage); message GM_SETBOUNDS;
end;
{ TVarGrid }
TVarGrid = class(TCustomDrawGrid)
private
FFirstVisibleColumn: integer;
FHideSelection: boolean;
FImages: TImageList;
FItems: TVarList;
FItemsChanging: boolean;
FColumnsMap: array of integer;
FMultiSelect: boolean;
FOnAfterSort: TNotifyEvent;
FOnCellAttributes: TOnCellAttributes;
FOnCheckBoxClick: TCellNotifyEvent;
FOnDrawCell: TOnDrawCellEvent;
FOnEditorHide: TNotifyEvent;
FOnEditorShow: TNotifyEvent;
FOnQuickSearch: TOnQuickSearch;
FOnTreeButtonClick: TCellNotifyEvent;
FSelCount: integer;
FAnchor: integer;
FSortColumn: integer;
FOnSortColumn: TOnSortColumnEvent;
FRow: integer;
FHintCell: TPoint;
FCurSearch: string;
FSearchTimer: TTimer;
FOldOpt: TGridOptions;
FNoDblClick: boolean;
FStrEditor: TVarGridStringEditor;
function GetRow: integer;
function GetRowSelected(RowIndex: integer): boolean;
function GetRowVisible(RowIndex: integer): boolean;
function GetSortOrder: TSortOrder;
procedure ItemsChanged(Sender: TObject);
procedure SetHideSelection(const AValue: boolean);
procedure SetRow(const AValue: integer);
procedure SetRowSelected(RowIndex: integer; const AValue: boolean);
procedure SetRowVisible(RowIndex: integer; const AValue: boolean);
procedure SetSortColumn(const AValue: integer);
procedure SetSortOrder(const AValue: TSortOrder);
procedure UpdateColumnsMap;
procedure UpdateSelCount;
procedure SelectRange(OldRow, NewRow: integer);
procedure CMHintShow(var Message: TCMHintShow); message CM_HINTSHOW;
function CellNeedsCheckboxBitmaps(const aCol,aRow: Integer): boolean;
procedure DrawCellCheckboxBitmaps(const aCol,aRow: Integer; const aRect: TRect);
function FindRow(const SearchStr: string; StartRow: integer): integer;
procedure DoSearchTimer(Sender: TObject);
protected
procedure SizeChanged(OldColCount, OldRowCount: Integer); override;
procedure DrawCell(aCol,aRow: Integer; aRect: TRect; aState:TGridDrawState); override;
procedure ColRowMoved(IsColumn: Boolean; FromIndex,ToIndex: Integer); override;
procedure PrepareCanvas(aCol,aRow: Integer; aState:TGridDrawState); override;
procedure MouseDown(Button: TMouseButton; Shift:TShiftState; X,Y:Integer); override;
procedure MouseMove(Shift: TShiftState; X,Y: Integer);override;
procedure KeyDown(var Key : Word; Shift : TShiftState); override;
procedure UTF8KeyPress(var UTF8Key: TUTF8Char); override;
procedure DoOnCellAttributes(ACol, ARow, ADataCol: integer; AState: TGridDrawState; var CellAttribs: TCellAttributes);
procedure HeaderClick(IsColumn: Boolean; index: Integer); override;
procedure AutoAdjustColumn(aCol: Integer); override;
procedure VisualChange; override;
procedure DrawColumnText(aCol,aRow: Integer; aRect: TRect; aState:TGridDrawState); override;
procedure DblClick; override;
procedure Click; override;
procedure GetCheckBoxState(const aCol, aRow:Integer; var aState:TCheckboxState); override;
procedure SetCheckboxState(const aCol, aRow:Integer; const aState: TCheckboxState); override;
procedure SetupCell(ACol, ARow: integer; AState: TGridDrawState; out CellAttribs: TCellAttributes);
procedure DoOnCheckBoxClick(ACol, ARow: integer);
procedure DoOnTreeButtonClick(ACol, ARow: integer);
function DoMouseWheelDown(Shift: TShiftState; MousePos: TPoint): Boolean; override;
function DoMouseWheelUp(Shift: TShiftState; MousePos: TPoint): Boolean; override;
function DoMouseWheel(Shift: TShiftState; WheelDelta: Integer; MousePos: TPoint): Boolean; override;
procedure DrawRow(aRow: Integer); override;
function GetCells(ACol, ARow: Integer): string; override;
function GetEditText(ACol, ARow: Longint): string; override;
procedure SetEditText(ACol, ARow: Longint; const Value: string); override;
procedure DoEditorShow; override;
procedure DoEditorHide; override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
function EditorByStyle(Style: TColumnButtonStyle): TWinControl; override;
procedure RemoveSelection;
procedure SelectAll;
procedure Sort; reintroduce;
function ColToDataCol(ACol: integer): integer;
function DataColToCol(ADataCol: integer): integer;
procedure EnsureSelectionVisible;
procedure EnsureRowVisible(ARow: integer);
procedure BeginUpdate; reintroduce;
procedure EndUpdate(aRefresh: boolean = true); reintroduce;
procedure EditCell(ACol, ARow: integer);
property Items: TVarList read FItems;
property RowSelected[RowIndex: integer]: boolean read GetRowSelected write SetRowSelected;
property RowVisible[RowIndex: integer]: boolean read GetRowVisible write SetRowVisible;
property SelCount: integer read FSelCount;
property Row: integer read GetRow write SetRow;
property FirstVisibleColumn: integer read FFirstVisibleColumn;
published
property Align;
property AlternateColor;
property Anchors;
property BorderSpacing;
property BorderStyle;
property Color;
property Columns;
property Constraints;
property DragCursor;
property DragKind;
property DragMode;
property Enabled;
property FixedCols;
property FixedRows;
property Font;
property GridLineWidth;
property Options;
property ParentColor default false;
property ParentFont;
property ParentShowHint default false;
property PopupMenu;
property RowCount;
property ScrollBars;
property ShowHint default True;
property TabOrder;
property TabStop;
property TitleFont;
property TitleImageList;
property TitleStyle default tsNative;
property Visible;
property OnClick;
property OnDblClick;
property OnEnter;
property OnExit;
property OnHeaderClick;
property OnHeaderSized;
property OnKeyDown;
property OnKeyPress;
property OnKeyUp;
property OnMouseDown;
property OnMouseMove;
property OnMouseUp;
property OnMouseWheelDown;
property OnMouseWheelUp;
property OnContextPopup;
property OnDragDrop;
property OnDragOver;
property OnEndDock;
property OnEndDrag;
property OnStartDock;
property OnStartDrag;
property OnUTF8KeyPress;
property OnResize;
property OnGetEditText;
property OnSetEditText;
property Images: TImageList read FImages write FImages;
property MultiSelect: boolean read FMultiSelect write FMultiSelect default False;
property SortColumn: integer read FSortColumn write SetSortColumn default -1;
property SortOrder: TSortOrder read GetSortOrder write SetSortOrder default soAscending;
property HideSelection: boolean read FHideSelection write SetHideSelection default False;
property OnCellAttributes: TOnCellAttributes read FOnCellAttributes write FOnCellAttributes;
property OnDrawCell: TOnDrawCellEvent read FOnDrawCell write FOnDrawCell;
property OnSortColumn: TOnSortColumnEvent read FOnSortColumn write FOnSortColumn;
property OnAfterSort: TNotifyEvent read FOnAfterSort write FOnAfterSort;
property OnCheckBoxClick: TCellNotifyEvent read FOnCheckBoxClick write FOnCheckBoxClick;
property OnTreeButtonClick: TCellNotifyEvent read FOnTreeButtonClick write FOnTreeButtonClick;
property OnQuickSearch: TOnQuickSearch read FOnQuickSearch write FOnQuickSearch;
property OnEditorShow: TNotifyEvent read FOnEditorShow write FOnEditorShow;
property OnEditorHide: TNotifyEvent read FOnEditorHide write FOnEditorHide;
end;
procedure Register;
implementation
uses Variants, Math, GraphType, lclintf, Themes, types, lclproc
{$ifdef LCLcarbon} , carbonproc {$endif LCLcarbon};
const
roSelected = 1;
roCurRow = 2;
procedure Register;
begin
RegisterComponents('TransGUI', [TVarGrid]);
end;
{ TVarGridStringEditor }
procedure TVarGridStringEditor.msg_SetGrid(var Msg: TGridMessage);
begin
inherited;
Msg.Options:=Msg.Options and not EO_AUTOSIZE;
end;
procedure TVarGridStringEditor.msg_SetBounds(var Msg: TGridMessage);
var
ca: TCellAttributes;
begin
with Msg do begin
TVarGrid(Grid).SetupCell(Col, Row, [], ca);
with CellRect do begin
Inc(Left, ca.Indent);
if coDrawTreeButton in ca.Options then
Inc(Left, Bottom - Top);
if coDrawCheckBox in ca.Options then
Inc(Left, Bottom - Top);
if (ca.ImageIndex <> -1) and Assigned(TVarGrid(Grid).Images) then
Inc(Left, TVarGrid(Grid).Images.Width + 2);
Dec(Left, 3);
Dec(Top, 1);
SetBounds(Left, Top, Right-Left, Bottom-Top);
end;
end;
end;
{ TVarGrid }
procedure TVarGrid.ItemsChanged(Sender: TObject);
var
i, OldRows, OldCols: integer;
pt: TPoint;
begin
FItemsChanging:=True;
try
Perform(CM_MouseLeave, 0, 0); // Hack to call ResetHotCell to workaround a bug
OldRows:=RowCount;
OldCols:=Columns.Count;
i:=FItems.RowCnt + FixedRows;
if (FRow = -1) and (inherited Row >= i) and (i > FixedRows) then
inherited Row:=i - 1;
RowCount:=i;
if FRow <> -1 then begin
Row:=FRow;
FRow:=-1;
end;
UpdateSelCount;
while Columns.Count > FItems.ColCnt do
Columns.Delete(Columns.Count - 1);
if Columns.Count <> FItems.ColCnt then begin
Columns.BeginUpdate;
try
for i:=Columns.Count to FItems.ColCnt - 1 do
Columns.Add;
finally
Columns.EndUpdate;
end;
end;
if (OldRows <> RowCount) or (OldCols <> Columns.Count) then begin
if Parent <> nil then
HandleNeeded;
ResetSizes;
end
else
Invalidate;
pt:=ScreenToClient(Mouse.CursorPos);
if PtInRect(ClientRect, pt) then
MouseMove([], pt.x, pt.y);
finally
FItemsChanging:=False;
end;
end;
procedure TVarGrid.SetHideSelection(const AValue: boolean);
begin
if FHideSelection=AValue then exit;
FHideSelection:=AValue;
Invalidate;
end;
procedure TVarGrid.SetRow(const AValue: integer);
var
i, r: integer;
begin
if FItems.IsUpdating then
FRow:=AValue
else begin
r:=AValue + FixedRows;
if r <> inherited Row then begin
i:=LeftCol;
inherited Row:=r;
LeftCol:=i;
end;
end;
end;
function TVarGrid.GetRowSelected(RowIndex: integer): boolean;
begin
Result:=LongBool(FItems.RowOptions[RowIndex] and roSelected);
end;
function TVarGrid.GetRowVisible(RowIndex: integer): boolean;
begin
Result:=RowHeights[RowIndex + FixedRows] > 0;
end;
function TVarGrid.GetSortOrder: TSortOrder;
begin
Result:=inherited SortOrder;
end;
function TVarGrid.GetRow: integer;
begin
if FItems.IsUpdating and (FRow <> -1) then
Result:=FRow
else begin
Result:=inherited Row - FixedRows;
end;
end;
procedure TVarGrid.SetRowSelected(RowIndex: integer; const AValue: boolean);
var
i, j: integer;
begin
i:=FItems.RowOptions[RowIndex];
if AValue then begin
j:=i or roSelected;
if j <> i then
Inc(FSelCount);
end
else begin
j:=i and not roSelected;
if j <> i then
Dec(FSelCount);
end;
FItems.RowOptions[RowIndex]:=j;
InvalidateRow(RowIndex + FixedRows);
if FSelCount <= 1 then
InvalidateRow(inherited Row);
end;
procedure TVarGrid.SetRowVisible(RowIndex: integer; const AValue: boolean);
begin
if AValue then
RowHeights[RowIndex + FixedRows]:=DefaultRowHeight
else
RowHeights[RowIndex + FixedRows]:=0;
end;
procedure TVarGrid.SetSortColumn(const AValue: integer);
begin
if FSortColumn=AValue then exit;
FSortColumn:=AValue;
if FSortColumn >= 0 then
Options:=Options + [goHeaderPushedLook, goHeaderHotTracking]
else
Options:=Options - [goHeaderPushedLook, goHeaderHotTracking];
Sort;
end;
procedure TVarGrid.SetSortOrder(const AValue: TSortOrder);
begin
if SortOrder = AValue then exit;
inherited SortOrder:=AValue;
Sort;
end;
procedure TVarGrid.UpdateColumnsMap;
var
i, j: integer;
begin
FFirstVisibleColumn:=-1;
SetLength(FColumnsMap, Columns.Count);
j:=0;
for i:=0 to Columns.Count - 1 do
with Columns[i] do begin
if (FFirstVisibleColumn < 0) and Visible then
FFirstVisibleColumn:=i;
FColumnsMap[j]:=ID - 1;
Inc(j);
end;
SetLength(FColumnsMap, j);
end;
procedure TVarGrid.UpdateSelCount;
var
i: integer;
begin
FSelCount:=0;
for i:=0 to FItems.Count - 1 do
if RowSelected[i] then
Inc(FSelCount);
end;
procedure TVarGrid.SelectRange(OldRow, NewRow: integer);
var
dir: integer;
sel: boolean;
begin
if OldRow = NewRow then
exit;
if FAnchor = -1 then
FAnchor:=OldRow;
dir:=Sign(NewRow - OldRow);
if Sign(FAnchor - OldRow) <> Sign(FAnchor - NewRow) then
while OldRow <> FAnchor do begin
RowSelected[OldRow]:=False;
Inc(OldRow, dir);
end;
sel:=Abs(FAnchor - OldRow) < Abs(FAnchor - NewRow);
while OldRow <> NewRow do begin
RowSelected[OldRow]:=sel;
Inc(OldRow, dir);
end;
RowSelected[NewRow]:=True;
end;
procedure TVarGrid.CMHintShow(var Message: TCMHintShow);
var
ca: TCellAttributes;
pt: TPoint;
wd: integer;
R: TRect;
begin
with Message.HintInfo^ do begin
pt:=MouseToCell(CursorPos);
if (pt.x >= FixedCols) and (pt.y >= 0) then begin
R:=CellRect(pt.x, pt.y);
if PtInRect(R, CursorPos) then begin
SetupCell(pt.x, pt.y, [], ca);
if ca.Text <> '' then begin
wd:=Canvas.TextWidth(ca.Text);
Inc(R.Left, ca.Indent);
if coDrawTreeButton in ca.Options then
Inc(R.Left, R.Bottom - R.Top);
if coDrawCheckBox in ca.Options then
Inc(R.Left, R.Bottom - R.Top);
if (ca.ImageIndex <> -1) and Assigned(FImages) then
Inc(R.Left, FImages.Width + 2);
if (R.Right <= R.Left) or (R.Right - R.Left < wd + 5) then begin
HintStr:=ca.Text;
R.Top:=(R.Top + R.Bottom - Canvas.TextHeight(ca.Text)) div 2 - 4;
Dec(R.Left);
HintPos:=ClientToScreen(R.TopLeft);
end;
FHintCell:=pt;
end
else
Message.Result:=1;
end
else
Message.Result:=1;
end;
end;
end;
function TVarGrid.CellNeedsCheckboxBitmaps(const aCol, aRow: Integer): boolean;
var
C: TGridColumn;
begin
Result := false;
if (aRow>=FixedRows) and Columns.Enabled then begin
C := ColumnFromGridColumn(aCol);
result := (C<>nil) and (C.ButtonStyle=cbsCheckboxColumn)
end;
end;
procedure TVarGrid.DrawCellCheckboxBitmaps(const aCol, aRow: Integer; const aRect: TRect);
var
AState: TCheckboxState;
begin
AState := cbUnchecked;
GetCheckBoxState(aCol, aRow, aState);
DrawGridCheckboxBitmaps(aCol, aRow, aRect, aState);
end;
function TVarGrid.FindRow(const SearchStr: string; StartRow: integer): integer;
var
i, c: integer;
s, ss: string;
v: variant;
begin
Result:=-1;
if Columns.Count = 0 then
exit;
c:=SortColumn;
if (c < 0) or (c >= Items.ColCnt) then
c:=0;
ss:=UTF8UpperCase(SearchStr);
for i:=StartRow to Items.Count - 1 do begin
v:=Items[c, i];
if VarIsNull(v) or VarIsEmpty(v) then
s:=''
else
s:=UTF8UpperCase(UTF8Encode(widestring(v)));
if Copy(s, 1, Length(ss)) = ss then begin
Result:=i;
break;
end;
end;
end;
procedure TVarGrid.DoSearchTimer(Sender: TObject);
begin
FSearchTimer.Enabled:=False;
FCurSearch:='';
end;
procedure TVarGrid.SizeChanged(OldColCount, OldRowCount: Integer);
begin
if not FItemsChanging and (FItems <> nil) then begin
FItems.ColCnt:=Columns.Count;
FItems.RowCnt:=RowCount - FixedRows;
UpdateColumnsMap;
end;
inherited;
end;
procedure TVarGrid.DrawCell(aCol, aRow: Integer; aRect: TRect; aState: TGridDrawState);
var
ca: TCellAttributes;
// ts: TTextStyle;
dd, IsHeader: boolean;
R, RR: TRect;
det: TThemedElementDetails;
sz: TSize;
i: integer;
begin
RR:=aRect;
IsHeader:=(gdFixed in aState) and (aRow=0) and (aCol>=FirstGridColumn);
if not IsHeader and MultiSelect and (FSelCount > 0) then
if (aRow >= FixedRows) and (aCol >= FixedCols) and RowSelected[aRow - FixedRows] then
Include(aState, gdSelected)
else
Exclude(aState, gdSelected);
PrepareCanvas(aCol, aRow, aState);
if DefaultDrawing then
SetupCell(aCol, aRow, aState, ca);
if not IsHeader or (TitleStyle<>tsNative) then
Canvas.FillRect(aRect);
if not IsHeader then begin
dd:=True;
if Assigned(FOnDrawCell) then begin
R:=CellRect(aCol, aRow);
if goVertLine in Options then
Dec(R.Right, 1);
if goHorzLine in Options then
Dec(R.Bottom, 1);
FOnDrawCell(Self, aCol, aRow - FixedRows, ColToDataCol(aCol), aState, R, dd);
end;
if DefaultDrawing and dd then begin
if CellNeedsCheckboxBitmaps(aCol,aRow) then
DrawCellCheckboxBitmaps(aCol,aRow,aRect)
else begin
Inc(aRect.Left, ca.Indent);
if coDrawTreeButton in ca.Options then begin
R:=aRect;
R.Right:=R.Left + (R.Bottom - R.Top);
aRect.Left:=R.Right;
if ThemeServices.ThemesEnabled then begin
if ca.Expanded then
det:=ThemeServices.GetElementDetails(ttGlyphOpened)
else
det:=ThemeServices.GetElementDetails(ttGlyphClosed);
sz:=ThemeServices.GetDetailSize(det);
with R do begin
Left:=(Left + Right - sz.cx) div 2;
Top:=(Top + Bottom - sz.cy) div 2;
R:=Bounds(Left, Top, sz.cx, sz.cy);
end;
ThemeServices.DrawElement(Canvas.Handle, det, R, nil);
end
else
with Canvas do begin
i:=(R.Bottom - R.Top) div 4;
InflateRect(R, -i, -i);
if (R.Right - R.Left) and 1 = 0 then
Dec(R.Right);
if (R.Bottom - R.Top) and 1 = 0 then
Dec(R.Bottom);
Pen.Color:=clWindowText;
Rectangle(R);
InflateRect(R, -1, -1);
Brush.Color:=clWindow;
FillRect(R);
InflateRect(R, -1, -1);
i:=(R.Top + R.Bottom) div 2;
MoveTo(R.Left, i);
LineTo(R.Right, i);
if not ca.Expanded then begin
i:=(R.Left + R.Right) div 2;
MoveTo(i, R.Top);
LineTo(i, R.Bottom);
end;
end;
end;
if coDrawCheckBox in ca.Options then begin
R:=aRect;
R.Right:=R.Left + (R.Bottom - R.Top);
aRect.Left:=R.Right;
DrawGridCheckboxBitmaps(aCol, aRow, R, ca.State);
end;
if (ca.ImageIndex <> -1) and Assigned(FImages) then begin
FImages.Draw(Canvas, aRect.Left + 2, (aRect.Bottom + aRect.Top - FImages.Height) div 2, ca.ImageIndex, gdeNormal);
Inc(aRect.Left, FImages.Width + 2);
end;
if ca.Text <> '' then begin
{
if Canvas.TextStyle.Alignment <> taLeftJustify then
if (aRect.Right <= aRect.Left) or (aRect.Right - aRect.Left < Canvas.TextWidth(ca.Text) + 9) then begin
ts:=Canvas.TextStyle;
ts.Alignment:=taLeftJustify;
Canvas.TextStyle:=ts;
end;
DrawCellText(aCol, aRow, aRect, aState, ca.Text);
}
with aRect do begin
Inc(Top, 2);
Inc(Left, constCellPadding);
Dec(Right, constCellPadding);
if Right<Left then
Right:=Left;
if Left>Right then
Left:=Right;
if Bottom<Top then
Bottom:=Top;
if Top>Bottom then
Top:=Bottom;
if (Left <> Right) and (Top <> Bottom) then begin
if Canvas.TextStyle.Alignment <> taLeftJustify then begin
i:=Canvas.TextWidth(ca.Text);
if i < Right - Left then
case Canvas.TextStyle.Alignment of
taRightJustify:
Left:=Right - i;
taCenter:
Left:=(Left + Right - i) div 2;
end;
end;
ExtUTF8Out(Canvas.Handle, Left, Top, ETO_OPAQUE or ETO_CLIPPED, @aRect, PChar(ca.Text), Length(ca.Text), nil);
end;
end;
end;
end;
end;
end;
if gdFixed in aState then
DefaultDrawCell(aCol, aRow, RR, aState)
else
DrawCellGrid(aCol, aRow, RR, aState);
end;
procedure TVarGrid.ColRowMoved(IsColumn: Boolean; FromIndex, ToIndex: Integer);
begin
inherited ColRowMoved(IsColumn, FromIndex, ToIndex);
UpdateColumnsMap;
end;
procedure TVarGrid.PrepareCanvas(aCol, aRow: Integer; aState: TGridDrawState);
var
F: TCustomForm;
begin
if FHideSelection and (FSelCount = 0) then begin
F:=GetParentForm(Self);
if (F <> nil) and (F.ActiveControl <> Self) then
aState:=aState - [gdSelected];
end;
inherited PrepareCanvas(aCol, aRow, aState);
with Canvas do
if (Font.Color = clWindow) and (Brush.Color = clHighlight) then begin
Font.Color:=clHighlightText;
{$ifdef LCLgtk2}
Brush.Color:=ColorToRGB(Brush.Color); // Workaround for LCL bug
{$endif LCLgtk2}
end;
end;
procedure TVarGrid.MouseDown(Button: TMouseButton; Shift: TShiftState; X, Y: Integer);
var
pt: TPoint;
IsCtrl, CheckBoxClicked: boolean;
ca: TCellAttributes;
R, RR: TRect;
begin
{$ifdef LCLcarbon}
IsCtrl:=ssMeta in GetCarbonShiftState;
{$else}
IsCtrl:=ssCtrl in Shift;
{$endif LCLcarbon}
CheckBoxClicked:=False;
pt:=MouseToCell(Point(X,Y));
if ssLeft in Shift then begin
SetupCell(pt.x, pt.y, [], ca);
RR:=CellRect(pt.x, pt.y);
Inc(RR.Left, ca.Indent);
if (RR.Left <= RR.Right) and (coDrawTreeButton in ca.Options) then begin
R:=RR;
R.Right:=R.Left + (R.Bottom - R.Top);
if R.Right > RR.Right then
R.Right:=RR.Right;
if PtInRect(R, Point(X,Y)) then begin
DoOnTreeButtonClick(pt.x, pt.y);
InvalidateCell(pt.x, pt.y);
if Assigned(OnDblClick) and (ssDouble in Shift) then
FNoDblClick:=True;
end;
Inc(RR.Left, RR.Bottom - RR.Top);
end;
if (RR.Left <= RR.Right) and (coDrawCheckBox in ca.Options) then begin
R:=RR;
R.Right:=R.Left + (R.Bottom - R.Top);
if R.Right > RR.Right then
R.Right:=RR.Right;
if PtInRect(R, Point(X,Y)) then begin
DoOnCheckBoxClick(pt.x, pt.y);
InvalidateCell(pt.x, pt.y);
CheckBoxClicked:=True;
if Assigned(OnDblClick) and (ssDouble in Shift) then
FNoDblClick:=True;
end;
end;
end;
if (ssRight in Shift) {$ifdef darwin} or (Shift*[ssLeft, ssCtrl] = [ssLeft, ssCtrl]) {$endif} then begin
SetFocus;
if (pt.x >= FixedCols) and (pt.y >= FixedRows) then begin
if MultiSelect and (SelCount > 0) and not RowSelected[pt.y - FixedRows] then
RemoveSelection;
Row:=pt.y - FixedRows;
end;
end
else
if MultiSelect and (ssLeft in Shift) and (pt.x >= FixedCols) and (pt.y >= FixedRows) then begin
if IsCtrl then begin
if SelCount = 0 then
RowSelected[Row]:=True;
RowSelected[pt.y - FixedRows]:=not RowSelected[pt.y - FixedRows];
FAnchor:=-1;
end
else
if ssShift in Shift then
SelectRange(Row, pt.y - FixedRows)
else begin
if (SelCount > 0) and not CheckBoxClicked then
RemoveSelection;
FAnchor:=-1;
end;
end;
inherited MouseDown(Button, Shift, X, Y);
end;
procedure TVarGrid.MouseMove(Shift: TShiftState; X, Y: Integer);
var
pt: TPoint;
begin
inherited MouseMove(Shift, X, Y);
pt:=MouseToCell(Point(x, y));
if (FHintCell.x <> -1) and ((FHintCell.x <> pt.x) or (FHintCell.y <> pt.y)) then begin
Application.CancelHint;
FHintCell.x:=-1;
end;
end;
procedure TVarGrid.KeyDown(var Key: Word; Shift: TShiftState);
var
r, k: integer;
ca: TCellAttributes;
begin
if EditorMode then begin
if Key = VK_ESCAPE then begin
EditorHide;
SetFocus;
end;
exit;
end;
r:=Row;
k:=Key;
if (Shift = []) and ( (k = VK_SPACE) or (k = VK_LEFT) or (k = VK_RIGHT) or (k = VK_ADD) or (k = VK_SUBTRACT) ) then begin
SetupCell(FixedCols, inherited Row, [], ca);
case k of
VK_SPACE:
if coDrawCheckBox in ca.Options then begin
DoOnCheckBoxClick(FixedCols, inherited Row);
Key:=0;
exit;
end;
VK_LEFT, VK_SUBTRACT:
if (coDrawTreeButton in ca.Options) and ca.Expanded then begin
DoOnTreeButtonClick(FixedCols, inherited Row);
Key:=0;
exit;
end;
VK_RIGHT, VK_ADD:
if (coDrawTreeButton in ca.Options) and not ca.Expanded then begin
DoOnTreeButtonClick(FixedCols, inherited Row);
Key:=0;
exit;
end;
end;
end;
inherited KeyDown(Key, Shift);
if MultiSelect then begin
if ssCtrl in Shift then begin
if k = VK_SPACE then
RowSelected[Row]:=not RowSelected[Row];
FAnchor:=-1;
end
else
if ssShift in Shift then begin
SelectRange(r, Row);
end
else
if k in [VK_LEFT, VK_RIGHT, VK_UP, VK_DOWN, VK_HOME, VK_END, VK_NEXT, VK_PRIOR] then begin
if SelCount > 0 then
RemoveSelection;
FAnchor:=-1;
end;
end;
if (Key = VK_RETURN) and (Shift = []) and Assigned(OnDblClick) then
OnDblClick(Self);
end;
procedure TVarGrid.UTF8KeyPress(var UTF8Key: TUTF8Char);
var
i, r: integer;
begin
inherited UTF8KeyPress(UTF8Key);
if UTF8Key = #0 then
exit;
FSearchTimer.Enabled:=False;
FSearchTimer.Enabled:=True;
if FCurSearch = '' then
i:=0
else
i:=Row;
FCurSearch:=FCurSearch + UTF8Key;
if Assigned(FOnQuickSearch) then begin
r:=i;
FOnQuickSearch(Self, FCurSearch, r);
if r <> i then
Row:=r;
end
else begin
i:=FindRow(FCurSearch, i);
if i >= 0 then
Row:=i;
end;
end;
procedure TVarGrid.DoOnCellAttributes(ACol, ARow, ADataCol: integer; AState: TGridDrawState; var CellAttribs: TCellAttributes);
begin
if Assigned(FOnCellAttributes) then
FOnCellAttributes(Self, ACol, ARow, ADataCol, AState, CellAttribs);
end;
procedure TVarGrid.HeaderClick(IsColumn: Boolean; index: Integer);
var
i: integer;
begin
inherited HeaderClick(IsColumn, index);
if IsColumn and (FSortColumn >= 0) then begin
fGridState:=gsNormal;
i:=ColToDataCol(index);
if FSortColumn = i then begin
if SortOrder = soAscending then
SortOrder:=soDescending
else
SortOrder:=soAscending;
end
else begin
SortOrder:=soAscending;
SortColumn:=i;
end;
end;
end;
procedure TVarGrid.AutoAdjustColumn(aCol: Integer);
var
i, j, wd, h, fr: integer;
ca: TCellAttributes;
begin
wd:=4;
fr:=FixedRows;
for i:=0 to FItems.Count - 1 do begin
h:=RowHeights[i + fr];
if h > 0 then begin
SetupCell(aCol, i + fr, [], ca);
j:=Canvas.TextWidth(ca.Text) + 6;
Inc(j, ca.Indent);
if coDrawTreeButton in ca.Options then
Inc(j, h);
if coDrawCheckBox in ca.Options then
Inc(j, h);
if (ca.ImageIndex <> -1) and Assigned(FImages) then
Inc(j, FImages.Width + 2);
if j > wd then
wd:=j;
end;
end;
ColumnFromGridColumn(aCol).Width:=wd;
end;
procedure TVarGrid.VisualChange;
begin
inherited VisualChange;
if HandleAllocated then
DefaultRowHeight:=Canvas.TextHeight('Xy') + 5;
UpdateColumnsMap;
end;
procedure TVarGrid.DrawColumnText(aCol, aRow: Integer; aRect: TRect; aState: TGridDrawState);
var
R: TRect;
i: integer;
begin
if (gdFixed in aState) and (aRow=0) and (aCol>=FirstGridColumn) then begin
R:=aRect;
if FSortColumn = ColToDataCol(aCol) then begin
R.Right:=R.Left + R.Bottom - R.Top;
InflateRect(R, -5, -5);
OffsetRect(R, -3, 0);
Dec(R.Bottom, 2);
aRect.Left:=R.Right + 2;
end;
inherited DrawColumnText(aCol, aRow, aRect, aState);
if FSortColumn = ColToDataCol(aCol) then
with Canvas do begin
Pen.Color:=clGrayText;
i:=(R.Left + R.Right) div 2;
if SortOrder = soAscending then begin
MoveTo(i, R.Top);
LineTo(R.Right, R.Bottom);
LineTo(R.Left, R.Bottom);
LineTo(i, R.Top);
end
else begin
MoveTo(R.TopLeft);
LineTo(R.Right, R.Top);