1 | unit UCoolBar;
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2 |
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3 | {$mode delphi}{$H+}
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4 |
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5 | interface
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6 |
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7 | uses
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8 | Classes, SysUtils, Controls, SpecializedList, Dialogs, ComCtrls, Forms;
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9 |
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10 | type
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11 | TCoolBar = class;
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12 |
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13 | { TCoolBand }
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14 |
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15 | TCoolBand = class
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16 | private
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17 | FControl: TControl;
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18 | FCoolBar: TCoolBar;
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19 | FText: string;
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20 | FVisible: Boolean;
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21 | procedure SetControl(AValue: TControl);
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22 | procedure SetText(AValue: string);
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23 | procedure SetVisible(AValue: Boolean);
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24 | procedure ControlVisibleChange(Sender: TObject);
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25 | published
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26 | property Text: string read FText write SetText;
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27 | property Visible: Boolean read FVisible write SetVisible;
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28 | property CoolBar: TCoolBar read FCoolBar;
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29 | property Control: TControl read FControl write SetControl;
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30 | end;
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31 |
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32 | { TCoolBar }
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33 |
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34 | TCoolBar = class(TCustomControl)
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35 | private
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36 | FBands: TListObject;
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37 | FRowSize: Integer;
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38 | DisableResize: Boolean;
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39 | function GetBand(Index: Integer): TCoolBand;
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40 | procedure SetBand(Index: Integer; AValue: TCoolBand);
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41 | procedure BandsUpdate(Sender: TObject);
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42 | procedure AsyncResize(Param: PtrInt);
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43 | procedure ControlResize(Sender: TObject);
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44 | procedure SetRowSize(AValue: Integer);
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45 | function SearchBand(Control: TControl): TCoolBand;
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46 | protected
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47 | procedure Paint; override;
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48 | procedure Resize; override;
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49 | public
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50 | procedure InsertControl(AControl: TControl; Index: integer); override;
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51 | procedure RemoveControl(AControl: TControl); override;
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52 | constructor Create(TheOwner: TComponent); override;
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53 | destructor Destroy; override;
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54 | procedure Arrange;
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55 | property Bands: TListObject read FBands;
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56 | property BandsIndex[Index: Integer]: TCoolBand read GetBand write SetBand;
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57 | published
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58 | property PopupMenu;
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59 | property Align;
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60 | property Color;
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61 | property RowSize: Integer read FRowSize write SetRowSize;
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62 | property OnResize;
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63 | end;
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64 |
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65 | procedure Register;
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66 |
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67 |
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68 | implementation
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69 |
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70 | procedure Register;
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71 | begin
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72 | RegisterComponents('Samples', [TCoolBar]);
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73 | end;
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74 |
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75 | { TCoolBand }
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76 |
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77 | procedure TCoolBand.SetControl(AValue: TControl);
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78 | begin
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79 | if FControl = AValue then Exit;
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80 | FControl := AValue;
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81 | if Assigned(AValue) then begin
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82 | AValue.Parent := CoolBar;
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83 | AValue.AddHandlerOnVisibleChanged(ControlVisibleChange);
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84 | end else AValue.RemoveHandlerOnVisibleChanged(ControlVisibleChange);
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85 | CoolBar.Arrange;
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86 | end;
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87 |
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88 | procedure TCoolBand.SetText(AValue: string);
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89 | begin
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90 | if FText = AValue then Exit;
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91 | FText := AValue;
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92 | end;
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93 |
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94 | procedure TCoolBand.SetVisible(AValue: Boolean);
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95 | begin
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96 | if FVisible = AValue then Exit;
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97 | FVisible := AValue;
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98 | if Assigned(Control) then Visible := FVisible;
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99 | end;
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100 |
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101 | procedure TCoolBand.ControlVisibleChange(Sender: TObject);
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102 | begin
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103 | FVisible := Control.Visible;
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104 | end;
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105 |
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106 | { TCoolBar }
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107 |
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108 | function TCoolBar.GetBand(Index: Integer): TCoolBand;
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109 | begin
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110 | Result := TCoolBand(FBands[Index]);
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111 | end;
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112 |
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113 | procedure TCoolBar.SetBand(Index: Integer; AValue: TCoolBand);
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114 | begin
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115 | FBands[Index] := AValue;
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116 | end;
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117 |
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118 | procedure TCoolBar.BandsUpdate(Sender: TObject);
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119 | begin
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120 | Arrange;
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121 | end;
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122 |
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123 | procedure TCoolBar.AsyncResize(Param: PtrInt);
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124 | begin
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125 | Arrange;
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126 | end;
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127 |
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128 | procedure TCoolBar.ControlResize(Sender: TObject);
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129 | begin
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130 | Application.QueueAsyncCall(AsyncResize, 0);
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131 | end;
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132 |
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133 | procedure TCoolBar.SetRowSize(AValue: Integer);
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134 | begin
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135 | if FRowSize = AValue then Exit;
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136 | FRowSize := AValue;
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137 | Arrange;
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138 | end;
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139 |
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140 | procedure TCoolBar.Paint;
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141 | begin
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142 | inherited Paint;
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143 | end;
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144 |
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145 | procedure TCoolBar.InsertControl(AControl: TControl; Index: integer);
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146 | var
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147 | NewBand: TCoolBand;
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148 | begin
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149 | inherited InsertControl(AControl, Index);
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150 | AControl.Align := alCustom;
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151 | NewBand := TCoolBand.Create;
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152 | NewBand.FCoolBar := Self;
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153 | NewBand.Control := AControl;
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154 | NewBand.Control.OnResize := ControlResize;
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155 | FBands.Insert(Index, NewBand);
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156 | Arrange;
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157 | end;
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158 |
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159 | procedure TCoolBar.RemoveControl(AControl: TControl);
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160 | var
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161 | Band: TCoolBand;
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162 | begin
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163 | Band := SearchBand(AControl);
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164 | FBands.Remove(Band);
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165 | AControl.OnResize := nil;
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166 | inherited RemoveControl(AControl);
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167 | Arrange;
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168 | end;
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169 |
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170 | function TCoolBar.SearchBand(Control: TControl): TCoolBand;
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171 | var
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172 | I: Integer;
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173 | begin
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174 | I := 0;
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175 | while (I < FBands.Count) and (TCoolBand(FBands[I]).Control <> Control) do Inc(I);
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176 | if I < FBands.Count then Result := TCoolBand(FBands[I])
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177 | else Result := nil;
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178 | end;
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179 |
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180 | procedure TCoolBar.Resize;
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181 | begin
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182 | inherited Resize;
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183 | //if not DisableResize then Arrange;
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184 | end;
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185 |
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186 | constructor TCoolBar.Create(TheOwner: TComponent);
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187 | begin
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188 | inherited;
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189 | FBands := TListObject.Create;
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190 | FBands.OnUpdate := BandsUpdate;
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191 | FRowSize := 24;
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192 | Align := alTop;
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193 | ControlStyle := ControlStyle + [csAcceptsControls];
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194 | Arrange;
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195 | end;
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196 |
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197 | destructor TCoolBar.Destroy;
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198 | begin
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199 | FreeAndNil(FBands);
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200 | inherited;
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201 | end;
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202 |
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203 | procedure TCoolBar.Arrange;
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204 | var
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205 | X, Y: Integer;
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206 | I: Integer;
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207 | NewHeight: Integer;
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208 | begin
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209 | try
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210 | DisableResize := True;
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211 | X := 0;
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212 | Y := 0;
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213 | for I := 0 to FBands.Count - 1 do
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214 | with TCoolBand(FBands[I]) do begin
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215 | if Assigned(Control) and Control.Visible then begin
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216 | if (CoolBar.Width - X) > Control.Width then begin
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217 | // Place CoolBand right to the previous
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218 | if (Control.Left <> X) or (Control.Top <> Y) or
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219 | (Control.Width <> Control.Width) or (Control.Height <> RowSize) then
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220 | Control.SetBounds(X, Y, Control.Width, RowSize);
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221 | Inc(X, Control.Width);
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222 | end else begin
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223 | // CoolBand do not fit in gap, place to next row
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224 | if I > 0 then begin
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225 | // Enlarge previous band
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226 | with TCoolBand(FBands[I - 1]).Control do begin
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227 | SetBounds(Left, Top, CoolBar.Width - Left, Height);
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228 | end;
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229 | end;
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230 | Inc(Y, RowSize);
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231 | X := 0;
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232 | if (Control.Left <> X) or (Control.Top <> Y) or
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233 | (Control.Width <> Control.Width) or (Control.Height <> RowSize) then
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234 | Control.SetBounds(X, Y, Control.Width, RowSize);
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235 | Inc(X, Control.Width);
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236 | end;
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237 | end;
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238 | end;
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239 | Y := Y + RowSize;
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240 | if Y > RowSize then NewHeight := Y
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241 | else NewHeight := RowSize;
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242 | if NewHeight <> Height then Height := NewHeight;
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243 | finally
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244 | DisableResize := False;
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245 | end;
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246 | end;
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247 |
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248 | end.
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249 |
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