1 | unit UListViewSort;
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2 |
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3 | // Date: 2010-11-03
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4 |
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5 | {$mode delphi}
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6 |
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7 | interface
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8 |
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9 | uses
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10 | {$IFDEF Windows}Windows, CommCtrl, {$ENDIF}Classes, Graphics, ComCtrls, SysUtils,
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11 | Controls, DateUtils, Dialogs, SpecializedList, Forms, Grids, StdCtrls, ExtCtrls,
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12 | LclIntf, LMessages, LclType, LResources;
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13 |
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14 | type
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15 | TSortOrder = (soNone, soUp, soDown);
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16 |
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17 | TListViewSort = class;
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18 |
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19 | TCompareEvent = function (Item1, Item2: TObject): Integer of object;
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20 | TListFilterEvent = procedure (ListViewSort: TListViewSort) of object;
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21 |
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22 | { TListViewSort }
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23 |
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24 | TListViewSort = class(TComponent)
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25 | private
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26 | FListView: TListView;
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27 | FOnCompareItem: TCompareEvent;
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28 | FOnFilter: TListFilterEvent;
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29 | FOnCustomDraw: TLVCustomDrawItemEvent;
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30 | {$IFDEF Windows}FHeaderHandle: HWND;{$ENDIF}
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31 | FColumn: Integer;
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32 | FOrder: TSortOrder;
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33 | FOldListViewWindowProc: TWndMethod;
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34 | FOnColumnWidthChanged: TNotifyEvent;
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35 | procedure DoColumnBeginResize(const AColIndex: Integer);
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36 | procedure DoColumnResized(const AColIndex: Integer);
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37 | procedure DoColumnResizing(const AColIndex, AWidth: Integer);
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38 | procedure SetListView(const Value: TListView);
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39 | procedure ColumnClick(Sender: TObject; Column: TListColumn);
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40 | procedure Sort(Compare: TCompareEvent);
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41 | procedure DrawCheckMark(Item: TListItem; Checked: Boolean);
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42 | procedure GetCheckBias(var XBias, YBias, BiasTop, BiasLeft: Integer;
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43 | const ListView: TListView);
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44 | procedure ListViewCustomDrawItem(Sender: TCustomListView;
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45 | Item: TListItem; State: TCustomDrawState; var DefaultDraw: Boolean);
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46 | procedure ListViewClick(Sender: TObject);
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47 | procedure UpdateColumns;
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48 | procedure SetColumn(const Value: Integer);
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49 | procedure SetOrder(const Value: TSortOrder);
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50 | {$IFDEF WINDOWS}
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51 | procedure NewListViewWindowProc(var AMsg: TMessage);
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52 | {$ENDIF}
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53 | public
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54 | List: TListObject;
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55 | Source: TListObject;
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56 | constructor Create(AOwner: TComponent); override;
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57 | destructor Destroy; override;
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58 | function CompareTime(Time1, Time2: TDateTime): Integer;
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59 | function CompareInteger(Value1, Value2: Integer): Integer;
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60 | function CompareString(Value1, Value2: string): Integer;
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61 | function CompareBoolean(Value1, Value2: Boolean): Integer;
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62 | procedure Refresh;
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63 | published
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64 | property ListView: TListView read FListView write SetListView;
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65 | property OnCompareItem: TCompareEvent read FOnCompareItem
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66 | write FOnCompareItem;
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67 | property OnFilter: TListFilterEvent read FOnFilter
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68 | write FOnFilter;
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69 | property OnCustomDraw: TLVCustomDrawItemEvent read FOnCustomDraw
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70 | write FOnCustomDraw;
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71 | property OnColumnWidthChanged: TNotifyEvent read FOnColumnWidthChanged
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72 | write FOnColumnWidthChanged;
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73 | property Column: Integer read FColumn write SetColumn;
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74 | property Order: TSortOrder read FOrder write SetOrder;
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75 | end;
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76 |
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77 | { TListViewFilter }
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78 |
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79 | TListViewFilter = class(TWinControl)
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80 | private
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81 | FOnChange: TNotifyEvent;
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82 | FStringGrid1: TStringGrid;
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83 | procedure GridDoOnKeyUp(Sender: TObject; var Key: Word; Shift: TShiftState);
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84 | procedure GridDoOnResize(Sender: TObject);
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85 | public
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86 | constructor Create(AOwner: TComponent); override;
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87 | procedure UpdateFromListView(ListView: TListView);
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88 | function TextEntered: Boolean;
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89 | function TextEnteredCount: Integer;
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90 | function TextEnteredColumn(Index: Integer): Boolean;
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91 | function GetColValue(Index: Integer): string;
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92 | property StringGrid: TStringGrid read FStringGrid1 write FStringGrid1;
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93 | published
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94 | property OnChange: TNotifyEvent read FOnChange write FOnChange;
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95 | property Align;
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96 | property Anchors;
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97 | property BorderSpacing;
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98 | end;
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99 |
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100 | procedure Register;
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101 |
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102 |
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103 | implementation
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104 |
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105 | procedure Register;
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106 | begin
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107 | RegisterComponents('Common', [TListViewSort, TListViewFilter]);
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108 | end;
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109 |
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110 | { TListViewFilter }
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111 |
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112 | procedure TListViewFilter.GridDoOnKeyUp(Sender: TObject; var Key: Word;
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113 | Shift: TShiftState);
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114 | begin
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115 | if Assigned(FOnChange) then
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116 | FOnChange(Self);
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117 | end;
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118 |
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119 | procedure TListViewFilter.GridDoOnResize(Sender: TObject);
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120 | begin
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121 | FStringGrid1.DefaultRowHeight := FStringGrid1.Height;
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122 | end;
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123 |
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124 | constructor TListViewFilter.Create(AOwner: TComponent);
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125 | begin
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126 | inherited Create(AOwner);
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127 | FStringGrid1 := TStringGrid.Create(Self);
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128 | FStringGrid1.Align := alClient;
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129 | FStringGrid1.Parent := Self;
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130 | FStringGrid1.Visible := True;
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131 | FStringGrid1.ScrollBars := ssNone;
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132 | FStringGrid1.FixedCols := 0;
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133 | FStringGrid1.FixedRows := 0;
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134 | FStringGrid1.RowCount := 1;
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135 | FStringGrid1.Options := [goFixedHorzLine, goFixedVertLine, goVertLine,
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136 | goHorzLine, goRangeSelect, goEditing, goAlwaysShowEditor, goSmoothScroll];
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137 | FStringGrid1.OnKeyUp := GridDoOnKeyUp;
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138 | FStringGrid1.OnResize := GridDoOnResize;
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139 | end;
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140 |
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141 | procedure TListViewFilter.UpdateFromListView(ListView: TListView);
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142 | var
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143 | I: Integer;
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144 | R: TRect;
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145 | begin
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146 | with FStringGrid1 do begin
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147 | while Columns.Count > ListView.Columns.Count do Columns.Delete(Columns.Count - 1);
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148 | while Columns.Count < ListView.Columns.Count do Columns.Add;
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149 | for I := 0 to ListView.Columns.Count - 1 do begin
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150 | Columns[I].Width := ListView.Columns[I].Width;
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151 | if Selection.Left = I then begin
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152 | R := CellRect(I, 0);
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153 | Editor.Left := R.Left + 2;
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154 | Editor.Width := R.Width - 4;
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155 | end;
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156 | end;
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157 | end;
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158 | end;
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159 |
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160 | function TListViewFilter.TextEntered: Boolean;
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161 | begin
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162 | Result := TextEnteredCount > 0;
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163 | end;
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164 |
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165 | function TListViewFilter.TextEnteredCount: Integer;
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166 | var
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167 | I: Integer;
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168 | begin
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169 | Result := 0;
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170 | for I := 0 to FStringGrid1.ColCount - 1 do begin
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171 | if FStringGrid1.Cells[I, 0] <> '' then begin
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172 | Inc(Result);
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173 | end;
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174 | end;
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175 | end;
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176 |
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177 | function TListViewFilter.TextEnteredColumn(Index: Integer): Boolean;
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178 | begin
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179 | Result := FStringGrid1.Cells[Index, 0] <> '';
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180 | end;
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181 |
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182 | function TListViewFilter.GetColValue(Index: Integer): string;
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183 | begin
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184 | if (Index >= 0) and (Index < StringGrid.Columns.Count) then
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185 | Result := StringGrid.Cells[Index, 0]
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186 | else Result := '';
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187 | end;
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188 |
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189 | { TListViewSort }
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190 |
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191 | {$IFDEF WINDOWS}
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192 | procedure TListViewSort.NewListViewWindowProc(var AMsg: TMessage);
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193 | var
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194 | vColWidth: Integer;
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195 | vMsgNotify: TLMNotify absolute AMsg;
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196 | Code: Integer;
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197 | begin
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198 | // call the old WindowProc of ListView
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199 | FOldListViewWindowProc(AMsg);
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200 |
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201 | // Currently we care only with WM_NOTIFY message
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202 | if AMsg.Msg = WM_NOTIFY then
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203 | begin
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204 | Code := NMHDR(PHDNotify(vMsgNotify.NMHdr)^.Hdr).Code;
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205 | case Code of
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206 | HDN_ENDTRACKA, HDN_ENDTRACKW:
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207 | DoColumnResized(PHDNotify(vMsgNotify.NMHdr)^.Item);
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208 |
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209 | HDN_BEGINTRACKA, HDN_BEGINTRACKW:
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210 | DoColumnBeginResize(PHDNotify(vMsgNotify.NMHdr)^.Item);
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211 |
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212 | HDN_TRACKA, HDN_TRACKW:
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213 | begin
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214 | vColWidth := -1;
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215 | if (PHDNotify(vMsgNotify.NMHdr)^.PItem<>nil)
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216 | and (PHDNotify(vMsgNotify.NMHdr)^.PItem^.Mask and HDI_WIDTH <> 0)
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217 | then
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218 | vColWidth := PHDNotify(vMsgNotify.NMHdr)^.PItem^.cxy;
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219 |
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220 | DoColumnResizing(PHDNotify(vMsgNotify.NMHdr)^.Item, vColWidth);
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221 | end;
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222 | end;
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223 | end;
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224 | end;
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225 | {$ENDIF}
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226 |
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227 | procedure TListViewSort.DoColumnBeginResize(const AColIndex: Integer);
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228 | begin
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229 | end;
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230 |
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231 | procedure TListViewSort.DoColumnResizing(const AColIndex, AWidth: Integer);
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232 | begin
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233 | end;
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234 |
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235 | procedure TListViewSort.DoColumnResized(const AColIndex: Integer);
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236 | begin
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237 | if Assigned(FOnColumnWidthChanged) then
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238 | FOnColumnWidthChanged(Self);
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239 | end;
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240 |
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241 | procedure TListViewSort.ColumnClick(Sender: TObject; Column: TListColumn);
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242 | begin
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243 | if Column.Index = Self.Column then begin
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244 | if FOrder = soUp then FOrder := soDown
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245 | else if FOrder = soDown then FOrder := soUp
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246 | else FOrder := soUp;
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247 | end else Self.Column := Column.Index;
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248 | Refresh;
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249 | UpdateColumns;
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250 | end;
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251 |
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252 | procedure TListViewSort.SetOrder(const Value: TSortOrder);
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253 | begin
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254 | FOrder := Value;
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255 | UpdateColumns;
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256 | end;
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257 |
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258 | procedure TListViewSort.SetColumn(const Value: Integer);
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259 | begin
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260 | FColumn := Value;
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261 | UpdateColumns;
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262 | end;
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263 |
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264 | procedure TListViewSort.SetListView(const Value: TListView);
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265 | begin
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266 | if FListView = Value then Exit;
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267 | if Assigned(FListView) then
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268 | ListView.WindowProc := FOldListViewWindowProc;
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269 | FListView := Value;
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270 | FListView.OnColumnClick := ColumnClick;
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271 | FListView.OnCustomDrawItem := ListViewCustomDrawItem;
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272 | FListView.OnClick := ListViewClick;
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273 | FOldListViewWindowProc := FListView.WindowProc;
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274 | {$IFDEF WINDOWS}
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275 | FListView.WindowProc := NewListViewWindowProc;
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276 | {$ENDIF}
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277 | end;
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278 |
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279 | procedure TListViewSort.Sort(Compare: TCompareEvent);
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280 | begin
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281 | if (List.Count > 0) then
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282 | List.Sort(Compare);
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283 | end;
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284 |
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285 | procedure TListViewSort.Refresh;
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286 | begin
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287 | if Assigned(FOnFilter) then FOnFilter(Self)
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288 | else if Assigned(Source) then
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289 | List.Assign(Source) else
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290 | List.Clear;
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291 | if ListView.Items.Count <> List.Count then
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292 | ListView.Items.Count := List.Count;
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293 | if Assigned(FOnCompareItem) and (Order <> soNone) then Sort(FOnCompareItem);
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294 | //ListView.Items[-1]; // Workaround for not show first row if selected
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295 | ListView.Refresh;
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296 | // Workaround for not working item selection on first row
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297 | //if not Assigned(ListView.Selected) then begin
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298 | // ListView.Items.Count := 0;
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299 | // ListView.Items.Count := List.Count;
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300 | //end;
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301 | //if ListView.Items.Count > 0 then
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302 | // ListView.Items[0].Selected := True;
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303 | //ListView.Selected := nil;
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304 | UpdateColumns;
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305 | end;
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306 |
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307 | const
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308 | //W_64: Integer = 64; {Width of thumbnail in ICON view mode}
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309 | H_64: Integer = 64; {Height of thumbnail size}
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310 | CheckWidth: Integer = 14; {Width of check mark box}
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311 | CheckHeight: Integer = 14; {Height of checkmark}
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312 | CheckBiasTop: Integer = 2; {This aligns the checkbox to be in centered}
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313 | CheckBiasLeft: Integer = 3; {In the row of the list item display}
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314 |
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315 | function TListViewSort.CompareBoolean(Value1, Value2: Boolean): Integer;
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316 | begin
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317 | if Value1 > Value2 then Result := 1
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318 | else if Value1 < Value2 then Result := -1
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319 | else Result := 0;
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320 | end;
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321 |
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322 | function TListViewSort.CompareInteger(Value1, Value2: Integer): Integer;
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323 | begin
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324 | if Value1 > Value2 then Result := 1
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325 | else if Value1 < Value2 then Result := -1
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326 | else Result := 0;
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327 | end;
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328 |
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329 | function TListViewSort.CompareString(Value1, Value2: string): Integer;
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330 | begin
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331 | Result := AnsiCompareStr(Value1, Value2);
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332 | // if Value1 > Value2 then Result := -1
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333 | // else if Value1 < Value2 then Result := 1
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334 | // else Result := 0;
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335 | end;
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336 |
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337 | function TListViewSort.CompareTime(Time1, Time2: TDateTime): Integer;
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338 | begin
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339 | Result := DateUtils.CompareDateTime(Time1, Time2);
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340 | end;
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341 |
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342 | constructor TListViewSort.Create(AOwner: TComponent);
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343 | begin
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344 | inherited;
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345 | List := TListObject.Create;
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346 | List.OwnsObjects := False;
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347 | end;
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348 |
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349 | destructor TListViewSort.Destroy;
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350 | begin
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351 | List.Free;
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352 | inherited;
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353 | end;
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354 |
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355 | procedure TListViewSort.DrawCheckMark(Item: TListItem; Checked:
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356 | Boolean);
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357 | var
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358 | TP1: TPoint;
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359 | XBias, YBias: Integer;
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360 | PenColor: TColor;
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361 | BrushColor: TColor;
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362 | BiasTop, BiasLeft: Integer;
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363 | Rect1: TRect;
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364 | lRect: TRect;
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365 | ItemLeft: Integer;
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366 | begin
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367 | XBias := 0;
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368 | YBias := 0;
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369 | BiasTop := 0;
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370 | BiasLeft := 0;
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371 | Item.Left := 0;
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372 | GetCheckBias(XBias, YBias, BiasTop, BiasLeft, ListView);
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373 | PenColor := ListView.Canvas.Pen.Color;
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374 | BrushColor := ListView.Canvas.Brush.Color;
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375 | //TP1 := Item.GetPosition;
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376 | lRect := Item.DisplayRect(drBounds); // Windows 7 workaround
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377 | TP1.X := lRect.Left;
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378 | TP1.Y := lRect.Top;
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379 | //ShowMessage(IntToStr(Item.Index) + ', ' + IntToStr(GetScrollPos(Item.ListView.Handle, SB_VERT)) + ' ' +
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380 | // IntToHex(Integer(Item), 8) + ', ' + IntToStr(TP1.X) + ', ' + IntToStr(TP1.Y));
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381 |
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382 | // if Checked then
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383 | ListView.Canvas.Brush.Color := clWhite;
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384 | ItemLeft := Item.Left;
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385 | ItemLeft := 23; // Windows 7 workaround
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386 |
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387 | Rect1.Left := ItemLeft - CheckWidth - BiasLeft + 1 + XBias;
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388 | //ShowMessage(IntToStr(Tp1.Y) + ', ' + IntToStr(BiasTop) + ', ' + IntToStr(XBias));
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389 | Rect1.Top := Tp1.Y + BiasTop + 1 + YBias;
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390 | Rect1.Right := ItemLeft - BiasLeft - 1 + XBias;
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391 | Rect1.Bottom := Tp1.Y + BiasTop + CheckHeight - 1 + YBias;
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392 | //ShowMessage(IntToStr(Rect1.Left) + ', ' + IntToStr(Rect1.Top) + ', ' + IntToStr(Rect1.Right) + ', ' + IntToStr(Rect1.Bottom));
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393 |
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394 | ListView.Canvas.FillRect(Rect1);
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395 | //if Checked then ListView.Canvas.Brush.Color := clBlack
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396 | ListView.Canvas.Brush.Color := clBlack;
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397 | ListView.Canvas.FrameRect(Rect1);
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398 | ListView.Canvas.FrameRect(Rect(Rect1.Left - 1, Rect1.Top - 1,
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399 | Rect1.Right + 1, Rect1.Bottom + 1));
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400 | if Checked then begin
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401 | ListView.Canvas.Pen.Color := clBlack;
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402 | ListView.Canvas.MoveTo(ItemLeft - BiasLeft - 2 + XBias - 2,
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403 | Tp1.Y + BiasTop + 3 + YBias);
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404 | ListView.Canvas.LineTo(ItemLeft - BiasLeft - (CheckWidth div 2) + XBias,
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405 | Tp1.Y + BiasTop + (CheckHeight - 4) + YBias);
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406 | ListView.Canvas.LineTo(ItemLeft - BiasLeft - (CheckWidth - 3) + XBias,
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407 | Tp1.Y + BiasTop + (CheckHeight div 2) + YBias - 1);
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408 |
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409 | ListView.Canvas.MoveTo(ItemLeft - BiasLeft - 2 - 1 + XBias - 2,
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410 | Tp1.Y + BiasTop + 3 + YBias);
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411 | ListView.Canvas.LineTo(ItemLeft - BiasLeft - (CheckWidth div 2) - 1 + XBias,
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412 | Tp1.Y + BiasTop + (CheckHeight - 4) + YBias);
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413 | ListView.Canvas.LineTo(ItemLeft - BiasLeft - (CheckWidth - 3) - 1 + XBias,
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414 | Tp1.Y + BiasTop + (CheckHeight div 2) + YBias - 1);
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415 | end;
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416 | //ListView.Canvas.Brush.Color := ListView.Color;
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417 | ListView.Canvas.Brush.Color := BrushColor;
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418 | ListView.Canvas.Pen.Color := PenColor;
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419 | end;
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420 |
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421 | procedure TListViewSort.GetCheckBias(var XBias, YBias, BiasTop, BiasLeft: Integer;
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422 | const ListView: TListView);
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423 | begin
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424 | XBias := 0;
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425 | YBias := 0;
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426 | if ListView.ViewStyle = vsICON then
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427 | begin
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428 | YBias := H_64 - CheckHeight;
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429 | XBias := 0;
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430 | end;
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431 | BiasTop := CheckBiasTop;
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432 | BiasLeft := CheckBiasLeft;
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433 | if ListView.ViewStyle <> vsReport then
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434 | begin
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435 | BiasTop := 0;
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436 | BiasLeft := 0;
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437 | end;
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438 | end;
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439 |
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440 | procedure TListViewSort.ListViewCustomDrawItem(Sender: TCustomListView;
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441 | Item: TListItem; State: TCustomDrawState; var DefaultDraw: Boolean);
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442 | begin
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443 | if Assigned(Item) then begin
|
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444 | if ListView.Checkboxes then
|
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445 | DrawCheckMark(Item, Item.Checked);
|
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446 | if Assigned(FOnCustomDraw) then
|
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447 | FOnCustomDraw(Sender, Item, State, DefaultDraw);
|
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448 | end;
|
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449 | end;
|
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450 |
|
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451 | procedure TListViewSort.ListViewClick(Sender: TObject);
|
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452 | var
|
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453 | Item: TListItem;
|
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454 | Pos: TPoint;
|
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455 | DefaultDraw: Boolean;
|
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456 | begin
|
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457 | Pos := ListView.ScreenToClient(Mouse.CursorPos);
|
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458 | Item := ListView.GetItemAt(Pos.X, Pos.Y);
|
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459 | //ShowMessage(IntToStr(Item.Index) + ', ' + IntToStr(Pos.X) + ', ' + IntToStr(Pos.Y));
|
---|
460 | if Assigned(Item) and (Pos.X < 20) then begin
|
---|
461 |
|
---|
462 | Item.Checked := not Item.Checked;
|
---|
463 | //ShowMessage(IntToStr(Item.Index) + ', ' +BoolToStr(Item.Checked));
|
---|
464 | if Assigned(ListView.OnChange) then
|
---|
465 | ListView.OnChange(Self, Item, ctState);
|
---|
466 | DefaultDraw := False;
|
---|
467 | ListViewCustomDrawItem(ListView, Item, [], DefaultDraw);
|
---|
468 | //ListView.UpdateItems(Item.Index, Item.Index);
|
---|
469 | end;
|
---|
470 | end;
|
---|
471 |
|
---|
472 | procedure TListViewSort.UpdateColumns;
|
---|
473 | {$IFDEF Windows}
|
---|
474 | const
|
---|
475 | HDF_SORTUP = $0400;
|
---|
476 | HDF_SORTDOWN = $0200;
|
---|
477 | SortOrder: array[TSortOrder] of Word = (0, HDF_SORTUP, HDF_SORTDOWN);
|
---|
478 | var
|
---|
479 | Item: THDItem;
|
---|
480 | I: Integer;
|
---|
481 | begin
|
---|
482 | if Assigned(FListView) then begin
|
---|
483 | FHeaderHandle := ListView_GetHeader(FListView.Handle);
|
---|
484 | for I := 0 to FListView.Columns.Count - 1 do begin
|
---|
485 | {$push}{$warn 5057 off}
|
---|
486 | FillChar(Item, SizeOf(THDItem), 0);
|
---|
487 | {$pop}
|
---|
488 | Item.Mask := HDI_FORMAT;
|
---|
489 | Header_GetItem(FHeaderHandle, I, Item);
|
---|
490 | Item.fmt := Item.fmt and not (HDF_SORTDOWN or HDF_SORTUP);
|
---|
491 | if (Column <> -1) and (I = Column) then
|
---|
492 | Item.fmt := Item.fmt or SortOrder[FOrder];
|
---|
493 | Header_SetItem(FHeaderHandle, I, Item);
|
---|
494 | end;
|
---|
495 | end;
|
---|
496 | end;
|
---|
497 | {$ELSE}
|
---|
498 | begin
|
---|
499 | end;
|
---|
500 | {$ENDIF}
|
---|
501 |
|
---|
502 | end.
|
---|