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{
fpGUI - Free Pascal GUI Toolkit
Copyright (C) 2006 - 2013 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 File Grid and String Grid. Both are decendants of Custom Grid.
}
unit fpg_grid;
{$mode objfpc}{$H+}
{
TODO:
* TCustomStringGrid: Col[] and Row[] properties need to be implemented,
returning a TStrings with all related text inserted.
* File Grid: Introduce support for images based on file types. User must
be able to override the default images with their own.
}
interface
uses
Classes,
SysUtils,
fpg_base,
fpg_main,
fpg_basegrid,
fpg_customgrid;
type
TfpgFileGrid = class(TfpgCustomGrid)
private
FFileList: TfpgFileList;
FFixedFont: TfpgFont;
protected
function GetRowCount: Integer; override;
procedure DrawCell(ARow, ACol: Integer; ARect: TfpgRect; AFlags: TfpgGridDrawState); override;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
function CurrentEntry: TFileEntry;
property FixedFont: TfpgFont read FFixedFont;
property FileList: TfpgFileList read FFileList;
property DefaultRowHeight;
property Font;
property HeaderFont;
published
property Align;
property BorderStyle;
property ColumnCount;
property Columns;
property FocusRow;
property FontDesc;
property HeaderFontDesc;
property Options;
property RowCount;
property ScrollBarStyle;
property TabOrder;
property TopRow;
property OnClick;
property OnDoubleClick;
property OnEnter;
property OnExit;
property OnKeyPress;
property OnMouseDown;
property OnMouseEnter;
property OnMouseExit;
property OnMouseMove;
property OnMouseUp;
property OnRowChange;
property OnShowHint;
end;
TfpgStringColumn = class(TfpgGridColumn)
private
FCells: TStringList;
public
constructor Create; override;
destructor Destroy; override;
property Cells: TStringList read FCells write FCells;
end;
TfpgCustomStringGrid = class(TfpgCustomGrid)
private
function GetCell(ACol, ARow: Integer): string;
function GetColumnAlignment(ACol: Integer): TAlignment;
function GetColumnTitle(ACol: Integer): string;
function GetObjects(ACol, ARow: Integer): TObject;
procedure SetCell(ACol, ARow: Integer; const AValue: string);
procedure SetColumnAlignment(ACol: Integer; const AValue: TAlignment);
procedure SetColumnTitle(ACol: Integer; const AValue: string);
procedure SetObjects(ACol, ARow: Integer; const AValue: TObject);
protected
function GetColumnWidth(ACol: Integer): integer; override;
procedure SetColumnWidth(ACol: Integer; const AValue: integer); override;
function GetColumns(AIndex: Integer): TfpgStringColumn; reintroduce;
procedure DoDeleteColumn(ACol: integer); override;
procedure DoSetRowCount(AValue: integer); override;
procedure DoAfterAddColumn(ACol: integer); override;
function DoCreateColumnClass: TfpgStringColumn; reintroduce; override;
procedure DrawCell(ARow, ACol: Integer; ARect: TfpgRect; AFlags: TfpgGridDrawState); override;
property Columns[AIndex: Integer]: TfpgStringColumn read GetColumns;
public
constructor Create(AOwner: TComponent); override;
function AddColumn(ATitle: string; AWidth: integer; AAlignment: TAlignment = taLeftJustify; AbackgroundColor: TfpgColor = clDefault; ATextColor: TfpgColor = clDefault): TfpgStringColumn; overload;
procedure DeleteRow(AIndex: integer); override;
property Cells[ACol, ARow: Integer]: string read GetCell write SetCell;
property Objects[ACol, ARow: Integer]: TObject read GetObjects write SetObjects;
property ColumnTitle[ACol: Integer]: string read GetColumnTitle write SetColumnTitle;
property ColumnWidth[ACol: Integer]: integer read GetColumnWidth write SetColumnWidth;
property ColumnAlignment[ACol: Integer]: TAlignment read GetColumnAlignment write SetColumnAlignment;
property ColumnBackgroundColor;
property ColumnTextColor;
// property Cols[index: Integer]: TStrings read GetCols write SetCols;
// property Rows[index: Integer]: TStrings read GetRows write SetRows;
procedure Clear;
end;
TfpgStringGrid = class(TfpgCustomStringGrid)
public
property Font;
published
property Align;
property AlternateBGColor;
property AutoHeight;
property BackgroundColor;
property BorderStyle;
// property ColResizing;
property ColumnCount;
property Columns;
property ColumnWidth;
property DefaultColWidth;
property DefaultRowHeight;
property Enabled;
property FocusCol;
property FocusRow;
property FontDesc;
property HeaderFontDesc;
property HeaderHeight;
property HeaderStyle;
property Hint;
property Options;
property ParentShowHint;
property PopupMenu;
property RowCount;
property RowSelect;
property ScrollBarStyle;
property ShowGrid;
property ShowHeader;
property ShowHint;
property TabOrder;
property TopRow;
property VisibleRows;
property OnCanSelectCell;
property OnClick;
property OnDoubleClick;
property OnDrawCell;
property OnEnter;
property OnExit;
property OnFocusChange;
property OnHeaderClick;
property OnKeyPress;
property OnMouseDown;
property OnMouseEnter;
property OnMouseExit;
property OnMouseMove;
property OnMouseUp;
property OnRowChange;
property OnShowHint;
end;
function CreateStringGrid(AOwner: TComponent; x, y, w, h: TfpgCoord; AColumnCount: integer = 0): TfpgStringGrid;
implementation
uses
fpg_constants;
function CreateStringGrid(AOwner: TComponent; x, y, w, h: TfpgCoord; AColumnCount: integer = 0): TfpgStringGrid;
begin
Result := TfpgStringGrid.Create(AOwner);
Result.Left := x;
Result.Top := y;
Result.Width := w;
Result.Height := h;
Result.ColumnCount := AColumnCount;
end;
{ TfpgFileGrid }
function TfpgFileGrid.GetRowCount: Integer;
begin
Result := FFileList.Count;
end;
procedure TfpgFileGrid.DrawCell(ARow, ACol: Integer; ARect: TfpgRect; AFlags: TfpgGridDrawState);
const
picture_width = 20;
var
e: TFileEntry;
x: integer;
y: integer;
s: Tfpgstring;
img: TfpgImage;
begin
e := FFileList.Entry[ARow];
if e = nil then
Exit; //==>
x := ARect.Left + 2;
y := ARect.Top;// + 1;
s := '';
if (e.EntryType = etDir) and (ACol = 0) then
Canvas.SetFont(HeaderFont)
else
Canvas.SetFont(Font);
case ACol of
0: begin
if e.EntryType = etDir then
img := fpgImages.GetImage('stdimg.folder') // Do NOT localize
else if e.IsExecutable then
img := fpgImages.GetImage('stdimg.executable') // Do NOT localize
else
img := fpgImages.GetImage('stdimg.document'); // Do NOT localize
if img <> nil then
Canvas.DrawImage(ARect.Left + (picture_width - img.Width) div 2,
y + (ARect.Height - img.Height) div 2, img);
if e.IsLink then // paint shortcut link symbol over existing image
Canvas.DrawImage(ARect.Left+1, ARect.Top+1, fpgImages.GetImage('stdimg.link'));
x := ARect.Left + picture_width;
s := e.Name;
end;
1: begin
if e.EntryType = etDir then
s := ''
else
s := FormatFloat('### ### ### ##0', e.Size);
x := ARect.Right - Font.TextWidth(s) - 1;
if x < (ARect.Left + 2) then
x := ARect.Left + 2;
end;
2: s := FormatDateTime('yyyy-mm-dd hh:nn', e.ModTime);
3: begin
if FFileList.HasFileMode then // on unix
s := e.Mode
else // on windows
s := e.Attributes;
Canvas.SetFont(FixedFont);
end;
end;
if FFileList.HasFileMode then // unix
case ACol of
4: s := e.Owner;
5: s := e.Group;
end;
// centre text in row height
y := y + ((DefaultRowHeight - Canvas.Font.Height) div 2);
Canvas.DrawString(x, y, s);
end;
constructor TfpgFileGrid.Create(AOwner: TComponent);
begin
FFileList := TfpgFileList.Create;
inherited Create(AOwner);
ColumnCount := 0;
RowCount := 0;
FFixedFont := fpgGetFont('Courier New-9');
if FFileList.HasFileMode then
AddColumn(rsName, 220) // save space for file mode, owner and group
else
AddColumn(rsName, 320); // more space to filename
AddColumn(rsSize, 80);
AddColumn(rsFileModifiedTime, 108);
if FFileList.HasFileMode then
begin
AddColumn(rsFileRights, 78);
AddColumn(rsFileOwner, 54);
AddColumn(rsFileGroup, 54);
end
else
AddColumn(rsFileAttributes, 78);
RowSelect := True;
DefaultRowHeight := fpgImages.GetImage('stdimg.document').Height + 2;
end;
destructor TfpgFileGrid.Destroy;
begin
OnRowChange := nil;
FFixedFont.Free;
FFileList.Free;
inherited Destroy;
end;
function TfpgFileGrid.CurrentEntry: TFileEntry;
begin
Result := FFileList.Entry[FocusRow];
end;
{ TfpgStringColumn }
constructor TfpgStringColumn.Create;
begin
inherited Create;
FCells := TStringList.Create;
end;
destructor TfpgStringColumn.Destroy;
begin
FCells.Free;
inherited Destroy;
end;
{ TfpgCustomStringGrid }
function TfpgCustomStringGrid.GetCell(ACol, ARow: Integer): string;
begin
if (ACol < 0) or (ACol > ColumnCount-1) then
Exit; //==>
if (ARow < 0) or (ARow > RowCount-1) then
Exit; //==>
Result := TfpgStringColumn(FColumns.Items[ACol]).Cells[ARow];
end;
function TfpgCustomStringGrid.GetColumnAlignment(ACol: Integer): TAlignment;
begin
if ACol > ColumnCount-1 then
Exit; //==>
Result := TfpgStringColumn(FColumns.Items[ACol]).Alignment;
end;
function TfpgCustomStringGrid.GetColumnTitle(ACol: Integer): string;
begin
if ACol > ColumnCount-1 then
Exit; //==>
Result := TfpgStringColumn(FColumns.Items[ACol]).Title;
end;
function TfpgCustomStringGrid.GetObjects(ACol, ARow: Integer): TObject;
begin
if ACol > ColumnCount-1 then
Exit; //==>
if ARow > RowCount-1 then
Exit; //==>
Result := TfpgStringColumn(FColumns.Items[ACol]).Cells.Objects[ARow];
end;
function TfpgCustomStringGrid.GetColumnWidth(ACol: Integer): integer;
begin
if ACol > ColumnCount-1 then
Exit; //==>
Result := TfpgStringColumn(FColumns.Items[ACol]).Width;
end;
procedure TfpgCustomStringGrid.SetCell(ACol, ARow: Integer; const AValue: string);
begin
if ACol > ColumnCount-1 then
Exit; //==>
if ARow > RowCount-1 then
Exit; //==>
if TfpgStringColumn(FColumns.Items[ACol]).Cells[ARow] <> AValue then
begin
BeginUpdate;
try
TfpgStringColumn(FColumns.Items[ACol]).Cells[ARow] := AValue;
finally
EndUpdate;
end;
end;
end;
procedure TfpgCustomStringGrid.SetColumnAlignment(ACol: Integer; const AValue: TAlignment);
begin
if ACol > ColumnCount-1 then
Exit; //==>
BeginUpdate;
try
TfpgStringColumn(FColumns.Items[ACol]).Alignment := AValue;
finally
EndUpdate;
end;
end;
procedure TfpgCustomStringGrid.SetColumnTitle(ACol: Integer; const AValue: string);
begin
if ACol > ColumnCount-1 then
Exit; //==>
BeginUpdate;
try
TfpgStringColumn(FColumns.Items[ACol]).Title := AValue;
finally
EndUpdate;
end;
end;
procedure TfpgCustomStringGrid.SetObjects(ACol, ARow: Integer; const AValue: TObject);
begin
if ACol > ColumnCount-1 then
Exit; //==>
if ARow > RowCount-1 then
Exit; //==>
TfpgStringColumn(FColumns.Items[ACol]).Cells.Objects[ARow] := AValue;
end;
procedure TfpgCustomStringGrid.SetColumnWidth(ACol: Integer; const AValue: integer);
begin
if ACol > ColumnCount-1 then
Exit; //==>
BeginUpdate;
try
inherited SetColumnWidth(ACol, AValue);
finally
EndUpdate;
end;
end;
function TfpgCustomStringGrid.GetColumns(AIndex: Integer): TfpgStringColumn;
begin
if (AIndex < 0) or (AIndex > ColumnCount-1) then
Result := nil
else
Result := TfpgStringColumn(FColumns.Items[AIndex]);
end;
procedure TfpgCustomStringGrid.DoDeleteColumn(ACol: integer);
begin
TfpgStringColumn(FColumns.Items[ACol]).Free;
FColumns.Delete(ACol);
end;
procedure TfpgCustomStringGrid.DoSetRowCount(AValue: integer);
var
diff: integer;
c: integer;
begin
inherited DoSetRowCount(AValue);
if FColumns.Count = 0 then
Exit; //==>
diff := AValue - TfpgStringColumn(FColumns.Items[0]).Cells.Count;
if diff > 0 then // We need to add rows
begin
for c := 0 to FColumns.Count - 1 do
begin
while TfpgStringColumn(FColumns[c]).Cells.Count <> AValue do
TfpgStringColumn(FColumns[c]).Cells.Append('');
end;
end;
end;
procedure TfpgCustomStringGrid.DoAfterAddColumn(ACol: integer);
var
r: integer;
begin
inherited DoAfterAddColumn(ACol);
// initialize cells for existing rows
for r := 0 to RowCount-1 do
TfpgStringColumn(FColumns.Items[ACol]).Cells.Append('');
end;
function TfpgCustomStringGrid.DoCreateColumnClass: TfpgStringColumn;
begin
Result := TfpgStringColumn.Create;
end;
procedure TfpgCustomStringGrid.DrawCell(ARow, ACol: Integer; ARect: TfpgRect;
AFlags: TfpgGridDrawState);
var
Flags: TfpgTextFlags;
txt: string;
r: TfpgRect;
begin
if Cells[ACol, ARow] <> '' then
begin
txt := Cells[ACol, ARow];
Flags:= [];
if not Enabled then
Include(Flags,txtDisabled);
case Columns[ACol].Alignment of
taLeftJustify:
Include(Flags,txtLeft);
taCenter:
Include(Flags,txtHCenter);
taRightJustify:
Include(Flags,txtRight);
end; { case }
case Columns[ACol].Layout of
tlTop:
Include(Flags,txtTop);
tlCenter:
Include(Flags,txtVCenter);
tlBottom:
Include(Flags,txtBottom);
end; { case }
with ARect,Columns[ACol] do
begin
r := ARect;
// make adjustment for margins
r.Left := r.Left + HMargin;
r.Width := r.Width - (HMargin*2);
// finally paint the text
Canvas.DrawText(r, txt, Flags);
end;
end;
end;
constructor TfpgCustomStringGrid.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
ColumnCount := 0;
RowCount := 0;
end;
function TfpgCustomStringGrid.AddColumn(ATitle: string; AWidth: integer;
AAlignment: TAlignment; ABackgroundColor: TfpgColor; ATextColor: TfpgColor): TfpgStringColumn;
begin
Updating;
Result := TfpgStringColumn(inherited AddColumn(ATitle, AWidth));
Result.Alignment := AAlignment;
if ABackgroundColor = clDefault then
Result.BackgroundColor := clBoxColor
else
Result.BackgroundColor:= ABackgroundColor;
if ATextColor = clDefault then
Result.TextColor := TextColor
else
Result.TextColor:= ATextColor;
if UpdateCount = 0 then
Updated; // if we called .BeginUpdate then don't clear csUpdating here
end;
procedure TfpgCustomStringGrid.DeleteRow(AIndex: integer);
var
c: integer;
begin
inherited DeleteRow(AIndex); // does sanity checks
for c := 0 to FColumns.Count-1 do
begin
TfpgStringColumn(FColumns[c]).Cells.Delete(AIndex);
end;
FRowCount := FRowCount-1;
if HasHandle then
Update;
end;
procedure TfpgCustomStringGrid.Clear;
var
i: integer;
begin
for i := FColumns.Count-1 downto 0 do
TfpgStringColumn(FColumns[i]).Free;
FColumns.Clear;
FRowCount := 0;
Update;
end;
end.
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