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