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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 Listview control.
}
unit fpg_listview;
{$mode objfpc}{$H+}
interface
uses
Classes,
SysUtils,
fpg_base,
fpg_main,
fpg_widget,
fpg_scrollbar;
type
TfpgListView = class;
TfpgLVItem = class;
TfpgLVColumns = class;
TfpgLVColumn = class;
TfpgLVColumnClickEvent = procedure(Listview: TfpgListView; Column: TfpgLVColumn; Button: Integer) of object;
TfpgLVColumn = class(TComponent)
private
FAlignment: TAlignment;
FCaptionAlignment: TAlignment;
FDown: Boolean;
FAutoSize: Boolean;
FCaption: String;
FClickable: Boolean;
FColumnIndex: Integer;
FColumns: TfpgLVColumns;
FHeight: Integer;
FResizable: Boolean;
FVisible: Boolean;
FWidth: Integer;
procedure SetAlignment(const AValue: TAlignment);
procedure SetAutoSize(const AValue: Boolean);
procedure SetCaption(const AValue: String);
procedure SetCaptionAlignment(const AValue: TAlignment);
procedure SetColumnIndex(const AValue: Integer);
procedure SetHeight(const AValue: Integer);
procedure SetResizable(const AValue: Boolean);
procedure SetVisible(const AValue: Boolean);
procedure SetWidth(const AValue: Integer);
public
constructor Create(AColumns: TfpgLVColumns); reintroduce;
destructor Destroy; override;
property Caption: String read FCaption write SetCaption;
property CaptionAlignment: TAlignment read FCaptionAlignment write SetCaptionAlignment;
property Alignment: TAlignment read FAlignment write SetAlignment;
property AutoSize: Boolean read FAutoSize write SetAutoSize;
property Width: Integer read FWidth write SetWidth;
property Height: Integer read FHeight write SetHeight;
property Visible: Boolean read FVisible write SetVisible;
property ColumnIndex: Integer read FColumnIndex write SetColumnIndex;
property Clickable: Boolean read FClickable write FClickable;
property Resizable: Boolean read FResizable write SetResizable;
end;
TfpgLVColumns = class(TPersistent)
private
FListView: TfpgListView;
FColumns: TList;
function GetColumn(AIndex: Integer): TfpgLVColumn;
procedure SetColumn(AIndex: Integer; const AValue: TfpgLVColumn);
public
constructor Create(AListView: TfpgListView);
destructor Destroy; override;
function Add(AColumn: TfpgLVColumn): Integer;
procedure Clear;
procedure Delete(AIndex: Integer);
procedure Insert(AColumn: TfpgLVColumn; AIndex: Integer);
function Count: Integer;
property Column[AIndex: Integer]: TfpgLVColumn read GetColumn write SetColumn;
end;
TfpgLVItemState = set of (lisFocused, lisSelected, lisHotTrack);
TfpgLVItemPaintPart = set of (lvppBackground, lvppIcon, lvppText, lvppFocused);
TfpgLVPaintColumnEvent = procedure(ListView: TfpgListView; Canvas: TfpgCanvas; Column: TfpgLVColumn;
ColumnIndex: Integer; Area: TfpgRect; var PaintPart: TfpgLVItemPaintPart) of object;
TfpgLVPaintItemEvent = procedure(ListView: TfpgListView; Canvas: TfpgCanvas; Item: TfpgLVItem;
ItemIndex: Integer; Area:TfpgRect; var PaintPart: TfpgLVItemPaintPart) of object;
TfpgLVItemSelectEvent = procedure(ListView: TfpgListView; Item: TfpgLVItem;
ItemIndex: Integer; Selected: Boolean) of object;
IfpgLVItemViewer = interface
procedure ItemDeleted(AIndex: Integer);
procedure ItemAdded(AIndex: Integer);
procedure ItemChanged(AIndex: Integer);
procedure ItemsUpdated;
end;
TfpgLVItems = class(TObject)
private
FUpdateCount: Integer;
FColumns: TfpgLVColumns;
FCurrentIndexOf: Integer;
FViewers: TList;
FItems: TList;
function GetCapacity: Integer;
function GetItem(AIndex: Integer): TfpgLVItem;
procedure SetCapacity(const AValue: Integer);
procedure SetItem(AIndex: Integer; const AValue: TfpgLVItem);
procedure AddViewer(AValue: IfpgLVItemViewer);
procedure DeleteViewer(AValue: IfpgLVItemViewer);
// interface method triggers
procedure DoChange(AItem: TfpgLVItem);
procedure DoAdd(AItem: TfpgLVItem);
procedure DoDelete(AItem: TfpgLVItem);
procedure DoEndUpdate;
public
constructor Create(AViewer: IfpgLVItemViewer);
destructor Destroy; override;
function Add(AItem: TfpgLVItem): Integer;
function Count: Integer;
procedure Clear;
procedure Delete(AIndex: Integer);
function IndexOf(AItem: TfpgLVItem): Integer;
procedure InsertItem(AItem: TfpgLVItem; AIndex: Integer);
procedure BeginUpdate;
procedure EndUpdate;
property Capacity: Integer read GetCapacity write SetCapacity;
property Columns: TfpgLVColumns read FColumns;
property Item[AIndex: Integer]: TfpgLVItem read GetItem write SetItem;
end;
TfpgLVItem = class(TObject)
private
FCaption: String;
FItems: TfpgLVItems;
FSubItems: TStrings;
FUserData: Pointer;
function GetSelected(ListView: TfpgListView): Boolean;
procedure SetCaption(const AValue: String);
procedure SetSelected(ListView: TfpgListView; const AValue: Boolean);
procedure SubItemsChanged(Sender: TObject);
public
constructor Create(Items: TfpgLVItems); virtual;
destructor Destroy; override;
property Caption: String read FCaption write SetCaption;
property UserData: Pointer read FUserData write FUserData;
property SubItems: TStrings read FSubItems;
property Selected[ListView: TfpgListView]: Boolean read GetSelected write SetSelected;
end;
TfpgListView = class(TfpgWidget, IfpgLVItemViewer)
private
FItemIndex: Integer;
FMultiSelect: Boolean;
FOnPaintColumn: TfpgLVPaintColumnEvent;
FOnSelectionChanged: TfpgLVItemSelectEvent;
FShiftCount: Integer;
FSelectionFollowsFocus: Boolean;
FSelectionShiftStart: Integer;
FOnColumnClick: TfpgLVColumnClickEvent;
FSelected: TList;
FOldSelected: TList;
FUpdateCount: Integer;
FVScrollBar: TfpgScrollBar;
FHScrollBar: TfpgScrollBar;
FColumns: TfpgLVColumns;
FItems: TfpgLVItems;
FOnPaintItem: TfpgLVPaintItemEvent;
FShowHeaders: Boolean;
FResizingColumn: TfpgLVColumn;
FMouseDownPoint: TPoint;
FScrollBarNeedsUpdate: Boolean;
function GetItemHeight: Integer;
procedure SetItemIndex(const AValue: Integer);
procedure SetItems(const AValue: TfpgLVItems);
procedure SetMultiSelect(const AValue: Boolean);
procedure SetOnColumnClick(const AValue: TfpgLVColumnClickEvent);
procedure SetShowHeaders(const AValue: Boolean);
procedure VScrollChange(Sender: TObject; Position: Integer);
procedure HScrollChange(Sender: TObject; Position: Integer);
// interface methods
procedure ItemDeleted(AIndex: Integer);
procedure ItemAdded(AIndex: Integer);
procedure ItemChanged(AIndex: Integer);
procedure ItemsUpdated;
//
function GetVisibleColumnsWidth: Integer;
function GetItemAreaHeight: Integer;
procedure StartShiftSelection;
procedure EndShiftSelection;
procedure SelectionSetRangeEnabled(AStart, AEnd: Integer; AValue: Boolean);
procedure SelectionToggleRange(AStart, AEnd: Integer; const ShiftState: TShiftState; IgnoreStartIndex: Boolean);
procedure SelectionClear;
function ItemGetSelected(const AItem: TfpgLVItem): Boolean;
procedure ItemSetSelected(const AItem: TfpgLVItem; const AValue: Boolean);
function ItemGetFromPoint(const X, Y: Integer): TfpgLVItem;
function ItemGetRect(AIndex: Integer): TfpgRect;
function ItemIndexFromY(Y: Integer): Integer;
function HeaderHeight: Integer;
procedure DoRepaint;
procedure DoColumnClick(Column: TfpgLVColumn; Button: Integer);
procedure HandleHeaderMouseMove(x, y: Integer; btnstate: word; Shiftstate: TShiftState);
protected
procedure MsgPaint(var msg: TfpgMessageRec); message FPGM_PAINT;
procedure HandleMouseScroll(x, y: integer; shiftstate: TShiftState; delta: smallint); override;
procedure HandleLMouseDown(x, y: integer; shiftstate: TShiftState); override;
procedure HandleRMouseDown(x, y: integer; shiftstate: TShiftState); override;
procedure HandleLMouseUp(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 HandleKeyPress(var keycode: word; var shiftstate: TShiftState; var consumed: boolean); override;
procedure HandleKeyRelease(var keycode: word; var shiftstate: TShiftState; var consumed: boolean); override;
procedure HandlePaint; override;
procedure HandleResize(awidth, aheight: TfpgCoord); override;
procedure PaintHeaders; virtual;
procedure PaintItems; virtual;
procedure UpdateScrollBarPositions; virtual;
public
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
function GetClientRect: TfpgRect; override;
procedure BeginUpdate;
procedure EndUpdate;
procedure MakeItemVisible(AIndex: Integer; PartialOK: Boolean = False);
function ItemAdd: TfpgLVItem;
published
property Columns: TfpgLVColumns read FColumns;
property HScrollBar: TfpgScrollBar read FHScrollBar;
property ItemHeight: Integer read GetItemHeight;
property ItemIndex: Integer read FItemIndex write SetItemIndex;
property Items: TfpgLVItems read FItems write SetItems;
property MultiSelect: Boolean read FMultiSelect write SetMultiSelect;
property ParentShowHint;
property SelectionFollowsFocus: Boolean read FSelectionFollowsFocus write FSelectionFollowsFocus;
property ShowHeaders: Boolean read FShowHeaders write SetShowHeaders;
property ShowHint;
property TabOrder;
property VScrollBar: TfpgScrollBar read FVScrollBar;
property OnColumnClick: TfpgLVColumnClickEvent read FOnColumnClick write SetOnColumnClick;
property OnPaintColumn: TfpgLVPaintColumnEvent read FOnPaintColumn write FOnPaintColumn;
property OnPaintItem: TfpgLVPaintItemEvent read FOnPaintItem write FOnPaintItem;
property OnSelectionChanged: TfpgLVItemSelectEvent read FOnSelectionChanged write FOnSelectionChanged;
end;
implementation
uses
fpg_constants;
type
// used to access protected methods
TfpgScrollbarFriend = class(TfpgScrollbar)
end;
{ TfpgLVItems }
function Min(AInt, BInt: Integer): Integer;
begin
if AInt < Bint then
Result := AInt
else Result := BInt;
end;
function Max(AInt, BInt: Integer): INteger;
begin
if AInt > Bint then
Result := AInt
else Result := BInt;
end;
function TfpgLVItems.GetItem(AIndex: Integer): TfpgLVItem;
begin
Result := TfpgLVItem(FItems.Items[AIndex]);
end;
function TfpgLVItems.GetCapacity: Integer;
begin
Result := FItems.Capacity;
end;
procedure TfpgLVItems.SetCapacity(const AValue: Integer);
begin
FItems.Capacity := AValue;
end;
procedure TfpgLVItems.SetItem(AIndex: Integer; const AValue: TfpgLVItem);
begin
FItems.Items[AIndex] := AValue;
end;
procedure TfpgLVItems.AddViewer(AValue: IfpgLVItemViewer);
begin
if AValue <> nil then
FViewers.Add(AValue);
end;
procedure TfpgLVItems.DeleteViewer(AValue: IfpgLVItemViewer);
var
AIndex: Integer;
begin
AIndex := FViewers.IndexOf(AValue);
if AIndex > -1 then
begin
FViewers.Delete(AIndex);
end;
if FViewers.Count = 0 then
Free;
end;
procedure TfpgLVItems.DoChange(AItem: TfpgLVItem);
var
I: Integer;
AIndex: Integer;
begin
if FUpdateCount > 0 then
Exit;
AIndex := IndexOf(AItem);
for I := 0 to FViewers.Count -1 do
begin
IfpgLVItemViewer(FViewers.Items[I]).ItemChanged(AIndex);
end;
end;
procedure TfpgLVItems.DoAdd(AItem: TfpgLVItem);
var
I: Integer;
AIndex: Integer;
begin
if FUpdateCount > 0 then
Exit;
AIndex := IndexOf(AItem);
for I := 0 to FViewers.Count -1 do
begin
IfpgLVItemViewer(FViewers.Items[I]).ItemAdded(AIndex);
end;
end;
procedure TfpgLVItems.DoDelete(AItem: TfpgLVItem);
var
I: Integer;
AIndex: Integer;
begin
if FUpdateCount > 0 then
Exit;
AIndex := IndexOf(AItem);
for I := 0 to FViewers.Count -1 do
begin
IfpgLVItemViewer(FViewers.Items[I]).ItemDeleted(AIndex);
end;
end;
procedure TfpgLVItems.DoEndUpdate;
var
I: Integer;
begin
if FUpdateCount > 0 then
Exit;
for I := 0 to FViewers.Count -1 do
begin
IfpgLVItemViewer(FViewers.Items[I]).ItemsUpdated;
end;
end;
constructor TfpgLVItems.Create(AViewer: IfpgLVItemViewer);
begin
FItems := TList.Create;
FViewers := TList.Create;
AddViewer(AViewer);
end;
destructor TfpgLVItems.Destroy;
begin
FItems.Free;
FViewers.Free;
inherited Destroy;
end;
function TfpgLVItems.Add(AItem: TfpgLVItem): Integer;
begin
Result := Count;
InsertItem(AItem, Count);
DoAdd(AItem);
end;
function TfpgLVItems.Count: Integer;
begin
Result := FItems.Count;
end;
procedure TfpgLVItems.Clear;
var
i: integer;
begin
for i := FItems.Count-1 downto 0 do
Delete(i);
FItems.Clear;
end;
procedure TfpgLVItems.Delete(AIndex: Integer);
begin
DoDelete(GetItem(AIndex));
FItems.Delete(AIndex);
end;
function TfpgLVItems.IndexOf(AItem: TfpgLVItem): Integer;
begin
Result := -1;
// this checks for a index close to the old one whic can speed up
// search significantly when we are using indexof in a for loop
if (FCurrentIndexOf > 100) and (FCurrentIndexOf < Count-2) then
begin
if FItems.Items[FCurrentIndexOf] = Pointer(AItem) then
Result := FCurrentIndexOf
else if FItems.Items[FCurrentIndexOf+1] = Pointer(AItem) then
Result := FCurrentIndexOf+1
else if FItems.Items[FCurrentIndexOf-1] = Pointer(AItem) then
Result := FCurrentIndexOf-1
end;
if Result = -1 then
Result := FItems.IndexOf(AItem);
FCurrentIndexOf := Result;
end;
procedure TfpgLVItems.InsertItem(AItem: TfpgLVItem; AIndex: Integer);
begin
if AItem.InheritsFrom(TfpgLVItem) then
FItems.Insert(AIndex, AItem)
else
raise Exception.CreateFmt(rsErrItemOfWrongType, ['TfpgLVItem']);
end;
procedure TfpgLVItems.BeginUpdate;
begin
Inc(FUpdateCount);
end;
procedure TfpgLVItems.EndUpdate;
begin
Dec(FUpdateCount);
if FUpdateCount < 0 then
FUpdateCount := 0;
if FUpdateCount = 0 then
DoEndUpdate;
end;
{ TfpgLVItem }
procedure TfpgLVItem.SetCaption(const AValue: String);
begin
if FCaption=AValue then
Exit;
FCaption:=AValue;
if Assigned(FItems) then
FItems.DoChange(Self);
end;
function TfpgLVItem.GetSelected(ListView: TfpgListView): Boolean;
begin
Result := ListView.ItemGetSelected(Self);
end;
procedure TfpgLVItem.SetSelected(ListView: TfpgListView; const AValue: Boolean);
begin
ListView.ItemSetSelected(Self, AValue);
end;
procedure TfpgLVItem.SubItemsChanged(Sender: TObject);
begin
if Assigned(FItems) then
FItems.DoChange(Self);
end;
constructor TfpgLVItem.Create(Items: TfpgLVItems);
begin
FItems := Items;
FSubItems := TStringList.Create;
TStringList(FSubItems).OnChange := @SubItemsChanged;
end;
destructor TfpgLVItem.Destroy;
begin
FSubItems.Free;
inherited Destroy;
end;
{ TfpgListView }
procedure TfpgListView.SetShowHeaders(const AValue: Boolean);
begin
if FShowHeaders=AValue then
Exit;
FShowHeaders:=AValue;
DoRePaint;
end;
procedure TfpgListView.VScrollChange(Sender: TObject; Position: Integer);
begin
DoRepaint;
end;
procedure TfpgListView.HScrollChange(Sender: TObject; Position: Integer);
begin
DoRepaint;
end;
procedure TfpgListView.SetItems(const AValue: TfpgLVItems);
begin
if AValue = FItems then
Exit;
AValue.AddViewer(Self);
FItems.DeleteViewer(Self);
Fitems := AValue;
end;
procedure TfpgListView.SetMultiSelect(const AValue: Boolean);
begin
if FMultiSelect=AValue then
Exit;
FMultiSelect:=AValue;
end;
procedure TfpgListView.SetOnColumnClick(const AValue: TfpgLVColumnClickEvent);
begin
if FOnColumnClick=AValue then
Exit;
FOnColumnClick:=AValue;
end;
function TfpgListView.GetItemHeight: Integer;
begin
Result := Canvas.Font.Height + 4;
end;
procedure TfpgListView.SetItemIndex(const AValue: Integer);
begin
if FItemIndex=AValue then
Exit;
if (AValue >= -1) and (AValue < FItems.Count) then
FItemIndex:=AValue;
end;
procedure TfpgListView.ItemDeleted(AIndex: Integer);
begin
if FUpdateCount = 0 then
DoRePaint;
end;
procedure TfpgListView.ItemAdded(AIndex: Integer);
begin
if FUpdateCount = 0 then
DoRePaint;
end;
procedure TfpgListView.ItemChanged(AIndex: Integer);
begin
if FUpdateCount = 0 then
DoRePaint;
end;
procedure TfpgListView.ItemsUpdated;
begin
DoRepaint;
end;
function TfpgListView.GetClientRect: TfpgRect;
begin
Result.Top := 2;
Result.Left := 2;
Result.SetRight(Width - 2);
Result.SetBottom(Height - 2);
end;
function TfpgListView.GetVisibleColumnsWidth: Integer;
var
I: Integer;
begin
Result := 0;
for I := 0 to FColumns.Count-1 do
if FColumns.Column[I].Visible then
Inc(Result, FColumns.Column[I].Width);
end;
function TfpgListView.GetItemAreaHeight: Integer;
begin
Result := Height - 4;
if ShowHeaders then
Dec(Result, HeaderHeight);
if FHScrollBar.Visible then
Dec(Result,FHScrollBar.Height);
end;
procedure TfpgListView.StartShiftSelection;
var
I: Integer;
begin
Inc(FShiftCount);
if FItems.Count = 0 then
Exit;
if FShiftCount> 1 then
Exit;
FSelectionShiftStart := FItemIndex;
if FSelectionShiftStart = -1 then
Inc(FSelectionShiftStart);
FOldSelected.Clear;
FOldSelected.Capacity := FSelected.Capacity;
for I := 0 to FSelected.Count-1 do
begin
FOldSelected.Add(FSelected.Items[I]);
end;
end;
procedure TfpgListView.EndShiftSelection;
begin
Dec(FShiftCount);
if FShiftCount > 0 then
Exit;
FSelectionShiftStart := -1;
FOldSelected.Clear;
end;
procedure TfpgListView.SelectionSetRangeEnabled(AStart, AEnd: Integer; AValue: Boolean);
var
TmpI: LongInt;
I: LongInt;
ShouldShow: Boolean;
begin
if AStart > AEnd then
begin
TmpI := AStart;
AStart := AEnd;
AEnd := TmpI;
end;
FSelected.Clear;
FSelected.Capacity := FOldSelected.Capacity;
for I := 0 to FOldSelected.Count-1 do
begin
FSelected.Add(FOldSelected.Items[I]);
end;
if (AStart < 0) or (AEnd > FItems.Count-1) then
Exit;
for I := AStart to AEnd do
begin
ShouldShow := AValue;
if FOldSelected.IndexOf(FItems.Item[I]) > -1 then
ShouldShow := not AValue;
if I <> FSelectionShiftStart then
ItemSetSelected(FItems.Item[I], ShouldShow);
end;
end;
procedure TfpgListView.SelectionToggleRange(AStart, AEnd: Integer;
const ShiftState: TShiftState; IgnoreStartIndex: Boolean);
var
TmpI: Integer;
I: LongInt;
begin
TmpI := AStart;
if AStart > AEnd then
begin
AStart := AEnd;
AEnd := TmpI;
end;
if not FMultiSelect then
begin
SelectionClear;
ItemSetSelected(FItems.Item[TmpI], True);
Exit;
end;
if ssShift in ShiftState then
for I := AStart to AEnd do
begin
if not(IgnoreStartIndex and (I = TmpI))
then ItemSetSelected(FItems.Item[I], not ItemGetSelected(FItems.Item[I]));
end;
end;
procedure TfpgListView.SelectionClear;
var
Item: TfpgLVItem;
I: Integer;
begin
for I := FSelected.Count-1 downto 0 do
begin
Item := TfpgLVItem(FSelected.Items[I]);
FSelected.Delete(I);
if Assigned(FOnSelectionChanged) then
FOnSelectionChanged(Self, Item, Items.IndexOf(Item), False);
end;
end;
function TfpgListView.ItemGetSelected(const AItem: TfpgLVItem): Boolean;
begin
Result := FSelected.IndexOf(AItem) > -1;
end;
procedure TfpgListView.ItemSetSelected(const AItem: TfpgLVItem; const AValue: Boolean);
var
Index: Integer;
begin
Index := FSelected.IndexOf(AItem);
if AValue and (Index = -1) then
FSelected.Add(AItem);
if (AValue = False) and (Index <> -1) then
FSelected.Delete(Index);
if Assigned(FOnSelectionChanged) then
FOnSelectionChanged(Self, AItem, Items.IndexOf(AItem), AValue);
end;
function TfpgListView.ItemGetFromPoint(const X, Y: Integer): TfpgLVItem;
var
Index: Integer;
ItemTop: Integer;
begin
Result := nil;
ItemTop := (FVScrollBar.Position + Y) -2;
if ShowHeaders then
Dec(ItemTop, HeaderHeight);
Index := ItemTop div ItemHeight;
if Index < 0 then
Exit;
if Index >= FItems.Count then
Exit;
if FHScrollBar.Position - 2 + X > GetVisibleColumnsWidth then
Exit;
Result := FItems.Item[Index];
end;
function TfpgListView.ItemGetRect(AIndex: Integer): TfpgRect;
begin
Result.Top := 2 + (AIndex * ItemHeight) - FVScrollBar.Position;
if ShowHeaders then
Inc(Result.Top, HeaderHeight);
Result.Height := ItemHeight;
Result.Left := 2 - FHScrollBar.Position;
Result.Width := GetVisibleColumnsWidth;
end;
function TfpgListView.ItemIndexFromY(Y: Integer): Integer;
var
TopPos: Integer;
begin
if ShowHeaders and (Y < HeaderHeight) then
Exit(-1);
TopPos := (FVScrollBar.Position + Y) - 2;
if ShowHeaders then
Dec(TopPos, HeaderHeight);
Result := TopPos div ItemHeight;
if Result > Fitems.Count-1 then
Result := -1;
end;
function TfpgListView.HeaderHeight: Integer;
begin
Result := Canvas.Font.Height + 10;
end;
procedure TfpgListView.DoRepaint;
begin
if FUpdateCount = 0 then
RePaint;
end;
procedure TfpgListView.DoColumnClick(Column: TfpgLVColumn; Button: Integer);
begin
if not Column.Clickable then
Exit;
if Assigned(FOnColumnClick) then
FOnColumnClick(Self, Column, Button);
Column.FDown := True;
if FUpdateCount = 0 then
begin
Canvas.BeginDraw(False);
PaintHeaders;
Canvas.EndDraw;//(2,2, width-4, Height-4);
end;
end;
procedure TfpgListView.HandleHeaderMouseMove(x, y: Integer; btnstate: word;
Shiftstate: TShiftState);
var
I: Integer;
curLeft: Integer;
curRight: Integer;
Column: TfpgLVColumn;
LastColumn: TfpgLVColumn;
HeaderX: Integer; // this is X from the headers point of view
NewMouseCursor: TMouseCursor;
begin
curLeft := 0;
HeaderX := FHScrollBar.Position - 2 + X;
NewMouseCursor := MouseCursor;
LastColumn := nil;
for I := 0 to FColumns.Count-1 do
begin
Column := FColumns.Column[I];
if not Column.Visible then
Continue;
curRight := curLeft + Column.Width-1;
if Column.Resizable or (Assigned(LastColumn) and LastColumn.Resizable) then
begin
if (FResizingColumn <> nil) and (FResizingColumn = Column) then
begin
FResizingColumn.Width := (x + FHScrollBar.Position)- curLeft;
DoRepaint;
Break;
end
else begin
if (HeaderX >= curLeft) and (HeaderX <= curRight) then // we are within this columns space
begin
if ((LastColumn <> nil) and (LastColumn.Resizable) and (HeaderX - curLeft < 5))
or (Column.Resizable) and (curRight - HeaderX < 5)
then
begin
NewMouseCursor := mcSizeEW;
Break;
end;
end
else
NewMouseCursor := mcDefault;
end;
end;
LastColumn := Column;
Inc(curLeft, Column.Width);
end;
if not Assigned(FResizingColumn) and Assigned(LastColumn) and LastColumn.Resizable then
if (HeaderX - curLeft < 5) and (HeaderX - curLeft >= 0) then
NewMouseCursor := mcSizeEW;
if FResizingColumn <> nil then
NewMouseCursor := mcSizeEW;
if NewMouseCursor <> MouseCursor then
MouseCursor := NewMouseCursor;
end;
procedure TfpgListView.MsgPaint(var msg: TfpgMessageRec);
begin
// Optimises painting and prevents Begin[End]Draw and OnPaint event firing
// in not needed.
if FUpdateCount = 0 then
inherited MsgPaint(msg);
end;
procedure TfpgListView.HandleMouseScroll(x, y: integer;
shiftstate: TShiftState; delta: smallint);
var
cRect: TfpgRect;
begin
cRect := GetClientRect;
if FShowHeaders then
Inc(cRect.Top, HeaderHeight);
if FHScrollBar.Visible then
Dec(cRect.Height, FHScrollBar.Height);
if FVScrollBar.Visible then
Dec(cRect.Width, FVScrollBar.Width);
if not PtInRect(cRect, Point(X,Y)) then
Exit;
TfpgScrollbarFriend(FVScrollBar).HandleMouseScroll(x, y, shiftstate, delta);
end;
procedure TfpgListView.HandleLMouseDown(x, y: integer; shiftstate: TShiftState);
var
Item: TfpgLVItem;
cRect: TfpgRect;
curLeft, curRight: Integer;
I: Integer;
Column: TfpgLVColumn;
LastColumn: TfpgLVColumn;
HeaderX: Integer;
begin
inherited HandleLMouseDown(x, y, shiftstate);
cRect := GetClientRect;
FMouseDownPoint := Point(X,Y);
if not PtInRect(cRect, Point(X,Y)) then
Exit;
if FShowHeaders then
begin
if (Y < HeaderHeight + cRect.Top) then
begin
LastColumn := nil;
HeaderX := FHScrollBar.Position - 2 + x;
curLeft := 0;
for I := 0 to FColumns.Count-1 do
begin
Column := FColumns.Column[I];
if Column.Visible then
begin
curRight := curLeft + Column.Width-1;
if (HeaderX <= curRight) and (HeaderX >= curLeft) then
begin
if (MouseCursor = mcSizeEW) then
begin
if Column.Resizable and (curRight - HeaderX < 5) then
FResizingColumn := Column
else
if Assigned(LastColumn) and LastColumn.Resizable and (HeaderX - curLeft < 5) then
FResizingColumn := LastColumn
end
else // only perform a mouse click if we aren't resizing
DoColumnClick(Column, 1);
end;
Inc(curLeft, Column.Width);
end;
LastColumn := Column;
end;
if not Assigned(FResizingColumn) and Assigned(LastColumn) and LastColumn.Resizable then
if (HeaderX - curLeft < 5) and (HeaderX - curLeft >= 0) then
FResizingColumn := LastColumn;
end;
Inc(cRect.Top, HeaderHeight);
end;
if FHScrollBar.Visible then
Dec(cRect.Height, FHScrollBar.Height);
if FVScrollBar.Visible then
Dec(cRect.Width, FVScrollBar.Width);
if not PtInRect(cRect, Point(X,Y)) then
Exit;
Item := ItemGetFromPoint(X, Y);
if not FMultiSelect then
SelectionClear;
if Item <> nil then
begin
FItemIndex := ItemIndexFromY(Y);
MakeItemVisible(FItemIndex);
if FMultiSelect then
begin
if not ((ssCtrl in shiftstate) or (ssShift in shiftstate)) then
begin
SelectionClear;
ItemSetSelected(Item, True);
end
else begin
if ssCtrl in shiftstate then
ItemSetSelected(Item, not ItemGetSelected(Item));
if ssShift in shiftstate then
SelectionSetRangeEnabled(FSelectionShiftStart, FItemIndex, True);
end
end
else ItemSetSelected(Item, True);
end;
DoRepaint;
end;
procedure TfpgListView.HandleRMouseDown(x, y: integer; shiftstate: TShiftState);
var
I: Integer;
cLeft, cRight: Integer;
cRect: TfpgRect;
Column: TfpgLVColumn;
begin
inherited HandleRMouseDown(x, y, shiftstate);
cRect := GetClientRect;
if not PtInRect(cRect, Point(X,Y)) then
Exit;
if FShowHeaders then
begin
if (Y < HeaderHeight + cRect.Top) then
begin
cLeft := cRect.Left - FHScrollBar.Position;
for I := 0 to FColumns.Count-1 do
begin
Column := FColumns.Column[I];
if Column.Visible then
begin
cRight := cLeft + Column.Width-1;
if (X <= cRight) and (X >= cLeft) then
DoColumnClick(Column, 3);
Inc(cLeft, Column.Width);
end;
end;
end;
Inc(cRect.Top, HeaderHeight);
end;
if FVScrollBar.Visible then
Dec(cRect.Width, FVScrollBar.Width);
if FHScrollBar.Visible then
Dec(cRect.Height, FHScrollBar.Height);
end;
procedure TfpgListView.HandleLMouseUp(x, y: integer; shiftstate: TShiftState);
var
I: Integer;
begin
inherited HandleLMouseUp(x, y, shiftstate);
for I := 0 to FColumns.Count-1 do
begin
FColumns.Column[I].FDown := False;
end;
FResizingColumn := nil;
DoRepaint;
end;
procedure TfpgListView.HandleRMouseUp(x, y: integer; shiftstate: TShiftState);
var
I: Integer;
begin
inherited HandleRMouseUp(x, y, shiftstate);
for I := 0 to FColumns.Count-1 do
begin
FColumns.Column[I].FDown := False;
end;
DoRepaint;
end;
procedure TfpgListView.HandleMouseMove(x, y: integer; btnstate: word;
shiftstate: TShiftState);
var
cRect: TfpgRect;
begin
inherited HandleMouseMove(x, y, btnstate, shiftstate);
cRect := GetClientRect;
if not PtInRect(cRect, Point(X,Y)) and (FResizingColumn = nil) then
Exit;
if ((Y < (cRect.Top + HeaderHeight)) and ShowHeaders) or (FResizingColumn <> nil) then
begin
HandleHeaderMouseMove(x, y, btnstate, shiftstate);
end
else
if (MouseCursor <> mcDefault) and (FResizingColumn = nil) then
MouseCursor := mcDefault;
//if FVScrollBar.Visible then Dec(cRect.Width, FVScrollBar.Width);
//if FHScrollBar.Visible then Dec(cRect.Height, FHScrollBar.Height);
end;
procedure TfpgListView.HandleKeyPress(var keycode: word;
var shiftstate: TShiftState; var consumed: boolean);
var
iIndex: Integer;
OldIndex: Integer;
procedure CheckMultiSelect;
begin
if FMultiSelect then begin
if (ssShift in shiftstate) or (FSelectionShiftStart > -1) then
begin
SelectionSetRangeEnabled(FSelectionShiftStart, FItemIndex, True);
end
else if ssCtrl in shiftstate then
begin
SelectionToggleRange(FItemIndex, FItemIndex, shiftstate, False);
end;
end;
end;
procedure CheckSelectionFocus;
begin
if ((ssShift in shiftstate) or (ssCtrl in shiftstate)) then
Exit;
SelectionClear;
if FSelectionFollowsFocus and (FItemIndex > -1) then
ItemSetSelected(FItems.Item[FItemIndex], True);
end;
begin
consumed := True;
OldIndex := FItemIndex;
//WriteLn('Got key: ',IntToHex(keycode, 4));
case keycode of
keyShift, keyShiftR:
begin
if FMultiSelect then
StartShiftSelection;
end;
keyUp:
begin
if ItemIndex > 0 then
ItemIndex := ItemIndex-1;
MakeItemVisible(ItemIndex);
if OldIndex <> ItemIndex then
CheckSelectionFocus;
CheckMultiSelect;
end;
keyDown:
begin
ItemIndex := ItemIndex+1;
MakeItemVisible(ItemIndex);
if OldIndex <> ItemIndex then
CheckSelectionFocus;
CheckMultiSelect;
end;
keyLeft:
begin
FHScrollBar.Position := FHScrollBar.Position - FHScrollBar.ScrollStep;
end;
keyRight:
begin
FHScrollBar.Position := FHScrollBar.Position + FHScrollBar.ScrollStep;
end;
keyHome:
begin
ItemIndex := 0;
MakeItemVisible(ItemIndex);
if OldIndex <> ItemIndex then
CheckSelectionFocus;
CheckMultiSelect;
end;
keyEnd:
begin
ItemIndex := FItems.Count-1;
MakeItemVisible(ItemIndex);
if OldIndex <> ItemIndex then
CheckSelectionFocus;
CheckMultiSelect;
end;
keyPageUp:
begin
iIndex := ItemIndex - (GetItemAreaHeight div ItemHeight);
if iIndex < 0 then
iIndex := 0;
ItemIndex := iIndex;
MakeItemVisible(ItemIndex);
if OldIndex <> ItemIndex then
CheckSelectionFocus;
CheckMultiSelect;
end;
keyPageDown:
begin
iIndex := ItemIndex + (GetItemAreaHeight div ItemHeight);
if iIndex > FItems.Count-1 then
iIndex := FItems.Count-1;
ItemIndex := iIndex;
MakeItemVisible(ItemIndex);
if OldIndex <> ItemIndex then
CheckSelectionFocus;
CheckMultiSelect
end;
else
consumed := False;
inherited HandleKeyPress(keycode, shiftstate, consumed);
Exit;
end;
DoRepaint;
end;
procedure TfpgListView.HandleKeyRelease(var keycode: word;
var shiftstate: TShiftState; var consumed: boolean);
begin
consumed := True;
case keycode of
keyShift, keyShiftR:
begin
EndShiftSelection;
end;
else
consumed := False;
inherited HandleKeyRelease(keycode, shiftstate, consumed);
end;
end;
procedure TfpgListView.HandlePaint;
var
ClipRect: TfpgRect;
begin
//if FScrollBarNeedsUpdate then
UpdateScrollBarPositions;
fpgStyle.DrawControlFrame(Canvas, 0, 0, Width, Height);
ClipRect.Top := 2;
ClipRect.Left := 2;
ClipRect.Width := Width -4;
ClipRect.Height := Height -4;
if ShowHeaders then
begin
PaintHeaders;
Inc(ClipRect.Top, HeaderHeight);
Dec(ClipRect.Height, HeaderHeight);
end;
Canvas.SetClipRect(ClipRect);
// this paints the small square remaining below the vscrollbar and to the right of the hscrollbar
if FVScrollBar.Visible and FHScrollBar.Visible then
begin
Canvas.Color := clButtonFace;
Canvas.FillRectangle(Width - 2 - FVScrollBar.Width,
Height - 2 - FHScrollBar.Height,
Width - 2,
Height - 2);
end;
if FVScrollBar.Visible then
Dec(ClipRect.Width, FVScrollBar.Width);
if FHScrollBar.Visible then
Dec(ClipRect.Height, FhScrollBar.Height);
Canvas.SetClipRect(ClipRect);
PaintItems;
end;
procedure TfpgListView.HandleResize(awidth, aheight: TfpgCoord);
begin
inherited HandleResize(awidth, aheight);
FScrollBarNeedsUpdate := FScrollBarNeedsUpdate or FSizeIsDirty;
end;
procedure TfpgListView.PaintHeaders;
var
I: Integer;
cLeft,
cTop: Integer;
Column: TfpgLVColumn;
Flags: TFButtonFlags;
ClipRect: TfpgRect;
cRect: TfpgRect;
PaintPart: TfpgLVItemPaintPart;
tWidth,
tLeft: Integer;
begin
cLeft := 2;
ClipRect.Top := 2;
ClipRect.Left := 2;
ClipRect.Height := HeaderHeight;
ClipRect.Width := Width -4;
Canvas.SetClipRect(ClipRect);
if FHScrollBar.Visible then Dec(cLeft, FHScrollBar.Position);
cTop := 2;
for I := 0 to Columns.Count-1 do
begin
Column := Columns.Column[I];
if Column.Visible then
begin
Flags := [btfIsEmbedded];
if Column.FDown then Flags := Flags + [btfIsPressed];
cRect.Top := cTop;
cRect.Left := cLeft;
cRect.Width := Column.Width;
cRect.Height := HeaderHeight;
fpgStyle.DrawButtonFace(Canvas,cLeft, cRect.Top, cRect.Width, cRect.Height, Flags);
PaintPart := [lvppText];
if Assigned(FOnPaintColumn) then
FOnPaintColumn(Self, Canvas, Column, I, cRect, PaintPart);
if lvppText in PaintPart then
begin
tLeft := cLeft;
tWidth := Canvas.Font.TextWidth(Column.Caption);
case Column.CaptionAlignment of
taRightJustify: Inc(tLeft, Column.Width - tWidth - 5);
taCenter: Inc(tLeft, (Column.Width - tWidth - 5) div 2);
taLeftJustify: Inc(tLeft, 5);
end;
fpgStyle.DrawString(Canvas, tLeft, cTop+5, Column.Caption, Enabled);
end;
Inc(cLeft, Column.Width);
end;
end;
if cLeft < FWidth-2 then
begin
Canvas.SetColor(clButtonFace);
Canvas.FillRectangle(cLeft, cTop, cLeft+(Width-3-cLeft), Canvas.Font.Height+10);
end;
end;
procedure TfpgListView.PaintItems;
var
FirstIndex,
LastIndex: Integer;
I, J : Integer;
PaintPart: TfpgLVItemPaintPart;
ItemRect: TfpgRect;
ItemState: TfpgLVItemState;
Item: TfpgLVItem;
TheText: String;
TheTextColor: TfpgColor;
oClipRect: TfpgRect;
iColumnClipRect: TfpgRect;
ColumnIndex: Integer;
cBottom: Integer;
vBottom: Integer;
tLeft,
tWidth: Integer;
begin
FirstIndex := (FVScrollBar.Position) div ItemHeight;
LastIndex := (FVScrollBar.Position+GetItemAreaHeight) div ItemHeight;
if LastIndex > FItems.Count-1 then
LastIndex := FItems.Count-1;
cBottom := 2 + ((LastIndex+1 - FirstIndex) * ItemHeight);
if ShowHeaders then
Inc(cBottom, HeaderHeight);
oClipRect := Canvas.GetClipRect;
for I := FirstIndex to LastIndex do
begin
ItemState := [];
PaintPart := [lvppBackground, lvppIcon, lvppText];
ItemRect := ItemGetRect(I);
if (I = FirstIndex)
and (ShowHeaders)
and (ItemRect.Top < 2 + HeaderHeight) then
Dec(cBottom, (2 + HeaderHeight) - ItemRect.Top);
Item := FItems.Item[I];
if Item.Selected[Self] then
Include(ItemState, lisSelected);
if FItemIndex = I then
begin
Include(ItemState, lisFocused);
Include(PaintPart, lvppFocused);
end;
if lisSelected in (ItemState) then
begin
if Focused then
Canvas.Color := clSelection
else
Canvas.Color := clInactiveSel;
end
else Canvas.Color := clListBox;
Canvas.FillRectangle(ItemRect);
Exclude(PaintPart, lvppBackground);
TheTextColor := Canvas.TextColor;
if Assigned(FOnPaintItem) then
FOnPaintItem(Self, Canvas, Item, I, ItemRect, PaintPart);
if lvppIcon in PaintPart then
begin
{ TODO: paint icon }
end;
if lvppFocused in PaintPart then
begin
Canvas.Color := clBlack;
Canvas.SetLineStyle(1, lsDot);
Canvas.DrawRectangle(ItemRect);
end;
if lvppText in PaintPart then
begin
if lisSelected in ItemState then
Canvas.TextColor := clSelectionText;
for J := 0 to FColumns.Count-1 do
begin
if FColumns.Column[J].Visible then
begin
iColumnClipRect.Left := Max(ItemRect.Left, oClipRect.Left);
iColumnClipRect.Top := Max(ItemRect.Top, oClipRect.Top);
iColumnClipRect.SetRight(Min(ItemRect.Left+FColumns.Column[J].Width, oClipRect.Right));
iColumnClipRect.SetBottom(Min(ItemRect.Bottom, oClipRect.Bottom));
Canvas.SetClipRect(iColumnClipRect);
if FColumns.Column[J].ColumnIndex <> -1 then
ColumnIndex := FColumns.Column[J].ColumnIndex
else
ColumnIndex := J;
if ColumnIndex = 0 then
TheText := Item.Caption
else if Item.SubItems.Count >= ColumnIndex then
TheText := Item.SubItems.Strings[ColumnIndex-1]
else
TheText := '';
tLeft := ItemRect.Left;
tWidth := Canvas.Font.TextWidth(TheText);
case FColumns.Column[J].Alignment of
taRightJustify: Inc(tLeft, FColumns.Column[J].Width - tWidth - 5);
taCenter: Inc(tLeft, (FColumns.Column[J].Width - tWidth - 5) div 2);
taLeftJustify: Inc(tLeft, 5);
end;
fpgStyle.DrawString(Canvas, tLeft, ItemRect.Top+2, TheText, Enabled);
Inc(ItemRect.Left, FColumns.Column[J].Width);
//WriteLn(ItemRect.Left,' ', ItemRect.Top, ' ', ItemRect.Right, ' ', ItemRect.Bottom);
end;
end;
end;
Canvas.SetClipRect(oClipRect);
Canvas.TextColor := TheTextColor;
end;
vBottom := Height - 2;
if FHScrollBar.Visible then
Dec(vBottom, FHScrollBar.Height);
// the painted items haven't fully covered the visible area
if vBottom > cBottom then begin
ItemRect.Left := 2;
ItemRect.Top := cBottom;
ItemRect.SetBottom(vBottom);
ItemRect.Width := Width - 4;
Canvas.SetColor(clListBox);
Canvas.FillRectangle(ItemRect);
end;
if GetVisibleColumnsWidth < oClipRect.Width then
begin
ItemRect.Left := GetVisibleColumnsWidth+2;
ItemRect.SetRight(oClipRect.Right);
ItemRect.Top := oClipRect.Top;
ItemRect.Height := oClipRect.Height;
Canvas.SetColor(clListBox);
Canvas.FillRectangle(ItemRect);
end;
end;
procedure TfpgListView.UpdateScrollBarPositions;
var
BevelSize: Integer;
I: Integer;
MaxH,
MaxV: Integer;
begin
MaxH := 0;
MaxV := 0;
BevelSize := 2;
for I := 0 to Columns.Count -1 do
begin
if Columns.Column[I].Visible then
Inc(MaxH, Columns.Column[I].Width);
end;
MaxV := (FItems.Count+2) * ItemHeight - (Height);
if ShowHeaders then
Inc(MaxV, HeaderHeight);
if FVScrollBar.Visible then
Inc(MaxH, FVScrollBar.Width);
FHScrollBar.Top := Height - FHScrollBar.Height - (BevelSize );
FHScrollBar.Left := BevelSize;
FHScrollBar.Width := Width - (BevelSize * 2);
FVScrollBar.Top := BevelSize;
FVScrollBar.Left := Width - FVScrollBar.Width - (BevelSize );
FVScrollBar.Height := Height - FVScrollBar.Top - BevelSize;
if FVScrollBar.Visible and FHScrollBar.Visible then
begin
FHScrollBar.Width := FHScrollBar.Width - FVScrollBar.Width;
FVScrollBar.Height := FVScrollBar.Height - FHScrollBar.Height;
end;
FHScrollBar.Max := MaxH-(Width-(BevelSize * 2));
FVScrollBar.Max := MaxV;
if FVScrollBar.Max = 0 then
FVScrollBar.SliderSize := 1
else
begin
if (FVScrollBar.Max + FVScrollBar.Height) > 0 then
FVScrollBar.SliderSize := FVScrollBar.Height / (FVScrollBar.Max + FVScrollBar.Height)
else
FVScrollBar.SliderSize := 0.5;
end;
FVScrollBar.RepaintSlider;
if FHScrollBar.Max = 0 then
FHScrollBar.SliderSize := 1
else
begin
if (FHScrollBar.Max + FHScrollBar.Width) > 0 then
FHScrollBar.SliderSize := FHScrollBar.Width / (FHScrollBar.Max + FHScrollBar.Width)
else
FHScrollBar.SliderSize := 0.5;
end;
FHScrollBar.RepaintSlider;
if FHScrollBar.Visible then
FHScrollBar.UpdateWindowPosition;
if FVScrollBar.Visible then
FVScrollBar.UpdateWindowPosition;
FScrollBarNeedsUpdate := False;
end;
constructor TfpgListView.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
FWidth := 120;
FHeight := 80;
Focusable := True;
FShowHeaders := True;
FVScrollBar := TfpgScrollBar.Create(Self);
FVScrollBar.Orientation := orVertical;
FVScrollBar.OnScroll := @VScrollChange;
FVScrollBar.ScrollStep := 18;
FVScrollBar.Position := 0;
FHScrollBar := TfpgScrollBar.Create(Self);
FHScrollBar.Orientation := orHorizontal;
FHScrollBar.OnScroll := @HScrollChange;
FHScrollBar.ScrollStep := 18;
FHScrollBar.Position := 0;
FColumns := TfpgLVColumns.Create(Self);
FItems := TfpgLVItems.Create(Self);
FSelected := TList.Create;
FOldSelected := TList.Create;;
FSelectionShiftStart := -1;
FSelectionFollowsFocus := True;
FItemIndex := -1;
FScrollBarNeedsUpdate := True;
end;
destructor TfpgListView.Destroy;
begin
FItems.DeleteViewer(Self);
FSelected.Free;
FOldSelected.Free;
inherited Destroy;
end;
procedure TfpgListView.BeginUpdate;
begin
Inc(FUpdateCount);
FItems.BeginUpdate;
end;
procedure TfpgListView.EndUpdate;
begin
FItems.EndUpdate;
Dec(FUpdateCount);
if FUpdateCount < 0 then
FUpdateCount := 0;
if FUpdateCount = 0 then
DoRePaint;
end;
procedure TfpgListView.MakeItemVisible(AIndex: Integer; PartialOK: Boolean);
var
iTop,
iBottom: integer;
tVisible, bVisible: Boolean;
begin
if AIndex = -1 then
Exit;
iTop := AIndex * ItemHeight;
iBottom := iTop + ItemHeight;
tVisible := (iTop >= FVScrollBar.Position) and (iTop < FVScrollBar.Position + GetItemAreaHeight);
bVisible := (iBottom >= FVScrollBar.Position) and (iBottom < FVScrollBar.Position + GetItemAreaHeight);
if PartialOK and (bVisible or tVisible) then
Exit;
if bVisible and tVisible then
Exit;
if (iBottom >= FVScrollBar.Position + GetItemAreaHeight) then
FVScrollBar.Position := iBottom - GetItemAreaHeight
else
FVScrollBar.Position := iTop;
end;
function TfpgListView.ItemAdd: TfpgLVItem;
begin
Result := TfpgLVItem.Create(FItems);
FItems.Add(Result);
end;
{ TfpgLVColumns }
function TfpgLVColumns.GetColumn(AIndex: Integer): TfpgLVColumn;
begin
Result := TfpgLVColumn(FColumns.Items[AIndex]);
end;
procedure TfpgLVColumns.SetColumn(AIndex: Integer; const AValue: TfpgLVColumn);
begin
FColumns.Items[AIndex] := AValue;
end;
constructor TfpgLVColumns.Create(AListView: TfpgListView);
begin
FListView := AListView;
FColumns := TList.Create;
end;
destructor TfpgLVColumns.Destroy;
begin
FColumns.Free;
inherited Destroy;
end;
function TfpgLVColumns.Add(AColumn: TfpgLVColumn): Integer;
begin
Result := Count;
Insert(AColumn, Count);
end;
procedure TfpgLVColumns.Clear;
var
i: integer;
begin
for i := FColumns.Count-1 downto 0 do
Delete(i);
FColumns.Clear;
end;
procedure TfpgLVColumns.Delete(AIndex: Integer);
begin
FColumns.Delete(AIndex);
end;
procedure TfpgLVColumns.Insert(AColumn: TfpgLVColumn; AIndex: Integer);
begin
FColumns.Insert(AIndex, AColumn);
end;
function TfpgLVColumns.Count: Integer;
begin
Result := FColumns.Count;
end;
{ TfpgLVColumn }
procedure TfpgLVColumn.SetCaption(const AValue: String);
begin
if FCaption=AValue then
Exit;
FCaption:=AValue;
end;
procedure TfpgLVColumn.SetCaptionAlignment(const AValue: TAlignment);
begin
if FCaptionAlignment=AValue then exit;
FCaptionAlignment:=AValue;
if Assigned(FColumns) and Assigned(FColumns.FListView) then
FColumns.FListView.DoRepaint;
end;
procedure TfpgLVColumn.SetColumnIndex(const AValue: Integer);
begin
if FColumnIndex=AValue then
Exit;
FColumnIndex:=AValue;
end;
procedure TfpgLVColumn.SetHeight(const AValue: Integer);
begin
if FHeight=AValue then Exit;
FHeight:=AValue;
end;
procedure TfpgLVColumn.SetResizable(const AValue: Boolean);
begin
if FResizable=AValue then exit;
FResizable:=AValue;
end;
procedure TfpgLVColumn.SetVisible(const AValue: Boolean);
begin
if FVisible=AValue then exit;
FVisible:=AValue;
end;
procedure TfpgLVColumn.SetAutoSize(const AValue: Boolean);
begin
if FAutoSize=AValue then exit;
FAutoSize:=AValue;
end;
procedure TfpgLVColumn.SetAlignment(const AValue: TAlignment);
begin
if FAlignment=AValue then exit;
FAlignment:=AValue;
if Assigned(FColumns)and Assigned(FColumns.FListView) then
FColumns.FListView.DoRepaint;
end;
procedure TfpgLVColumn.SetWidth(const AValue: Integer);
begin
if FWidth=AValue then exit;
FWidth:=AValue;
if FWidth < 1 then
FWidth := 1;
end;
constructor TfpgLVColumn.Create(AColumns: TfpgLVColumns);
begin
FVisible := True;
FColumnIndex := -1;
FColumns := AColumns;
FClickable := True;
FAlignment := taLeftJustify;
FCaptionAlignment := taLeftJustify;
end;
destructor TfpgLVColumn.Destroy;
begin
inherited Destroy;
end;
end.
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