380 lines
12 KiB
ObjectPascal
380 lines
12 KiB
ObjectPascal
unit Dbpanel;
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interface
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uses
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Windows, Messages, SysUtils, Classes,Graphics, Controls, Forms, Dialogs,
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ExtCtrls, dbctrls, stdctrls, db, ADODB, ComCtrls;
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type
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TEditorstyle = (TsDbMemo,TsDBcombox,Tsdbedit);
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type
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TDBPanel = class(TPanel)
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private
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{ Private declarations }
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FEditorstyle:Teditorstyle;
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FLeft: Integer;
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FTop: Integer;
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maxTextLen: Integer;
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maxLabelLen: Integer;
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FTitleVisible :Boolean;
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FScrollBox: TScrollBox; {滚动控件}
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FLineHeight: Integer;
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//数据数组控件，动态生成
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MemoEditors: array of TDBMemo;
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comEditors: array of TDBCombobox;
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edEditors: array of TDBedit;
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ProgressEditor :array of TDBedit;
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Labels: array of TDBText; //字段标题，动态生成
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ProgressBars: array of TProgressBar;
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FDataSource: TDataSource; // 数据源
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FDataField_A: String; // DataField
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FDataField_B: String; // DataField
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FDataField_C: String; // DataField
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FColumns: Integer; //显示列数
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procedure FreeEditors; //释放数据输入控件的内存
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procedure AKeyDown(Sender:TObject; var Key: Word; Shift:TShiftState);
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procedure AKeyPress(Sender:TObject; var Key: Char);
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procedure AProgressEditorChange(Sender: TObject);
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function comEditor(Index: Integer):TDBComboBox;
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function edEditor(Index: Integer):TDBedit;
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function MemoEditor(Index: Integer): TDBMemo;
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protected
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{ Protected declarations }
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public
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constructor Create(AOwner:TComponent); override;
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destructor Destroy; override;
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function Get_TitleVisible() :Boolean;
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procedure Set_TitleVisible(Value : Boolean);
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procedure Setedit(Value : TEditorstyle);
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procedure CreateEditors(DS: TDataSource; ColCount: Integer); //创建各字段的数据输入控件
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procedure ClearHits(ItemIndex: Integer);
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procedure AddHits(ItemIndex:Integer; Hits: array of string);
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{ Public declarations }
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published
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property LimitLeft: Integer read FLeft write FLeft default 10;
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property LimitTop: Integer read FTop write FTop default 10;
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property Editorstyle : TEditorstyle read FEditorstyle write Setedit default tsdbMemo;
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property EditorWidth: Integer read maxTextLen write maxTextLen default 100;
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property TitleWidth: Integer read maxLabelLen write maxLabelLen default 100;
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property TitleVisible : Boolean read Get_TitleVisible write Set_TitleVisible default True;
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property LineHeight: Integer read FLineHeight write FLineHeight default 15;
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//property OnOkClick: TNotifyEvent read FClick write FClick;
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property DataSource: TDataSource read FDataSource write FDataSource; //数据源
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property DataField_Editor: String read FDataField_A write FDataField_A;
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property DataField_Title: String read FDataField_B write FDataField_B;
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property DataField_Progress: String read FDataField_C write FDataField_C;
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property Columns: Integer read FColumns write FColumns default 4;//表列数
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{ Published declarations }
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end;
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procedure Register;
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implementation
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procedure Register;
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begin
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RegisterComponents('Data Controls', [TDBPanel]);
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end;
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function TDBPanel.Get_TitleVisible() :Boolean;
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begin
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Result := FTitleVisible;
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end;
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procedure TDBPanel.Set_TitleVisible(Value : Boolean);
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begin
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FTitleVisible := Value;
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end;
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procedure TDBPanel.Setedit(Value : TEditorstyle);
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begin
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if FEditorstyle <> Value then
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begin
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FEditorstyle := Value;
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Invalidate;
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end;
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end;
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{ 为第I字段增加提示信息的方法}
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procedure TDBPanel.AddHits(ItemIndex:
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Integer; Hits: array of string);
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var
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m,n,i: Integer;
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begin
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if FEditorstyle = TsDBcombox then
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begin
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n := Length(comEditors);
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m := Length(Hits);
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if ItemIndex< n then
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for i:=0 to m-1 do
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comEditors[ItemIndex].Items.Add(Hits[i]);
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end
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else if FEditorstyle = TsDBEdit then
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begin
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n := Length(edEditors);
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m := Length(Hits);
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if ItemIndex< n then
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for i:=0 to m-1 do
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edEditors[ItemIndex].Hint:= Hits[i];
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end
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else if FEditorstyle = TsDBMemo then
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begin
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n := Length(memoEditors);
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m := Length(Hits);
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if ItemIndex< n then
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for i:=0 to m-1 do
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memoEditors[ItemIndex].Hint:= Hits[i];
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end;
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end;
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procedure TDBPanel.AKeyDown(Sender: TObject; var Key: Word; Shift: TShiftState);
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begin
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if (Sender is TDBComboBox) then
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begin
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case Key of
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VK_Next: (Sender as TDBComboBox).DataSource.DataSet.Next;
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VK_PRIOR: (Sender as TDBComboBox).DataSource.DataSet.Prior;
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end;
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end
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else if (Sender is TDBedit) then
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begin
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case Key of
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VK_Next: (Sender as TDBedit).DataSource.DataSet.Next;
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VK_PRIOR: (Sender as TDBedit).DataSource.DataSet.Prior;
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end;
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end
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else if (Sender is TDBMemo) then
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begin
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case Key of
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VK_Next: (Sender as TDBMemo).DataSource.DataSet.Next;
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VK_PRIOR: (Sender as TDBMemo).DataSource.DataSet.Prior;
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end;
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end;
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end;
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procedure TDBPanel.AProgressEditorChange(Sender: TObject);
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begin
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//
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end;
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procedure TDBPanel.AKeyPress(Sender: TObject; var Key: Char);
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begin
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if (Sender is TDBComboBox) or (Sender is TDBedit) or (Sender is TDBMemo) then
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if Key=#13 then
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(Owner as TForm).Perform(WM_NEXTDLGCTL, 0, 0);
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end;
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procedure TDBPanel.ClearHits(ItemIndex: Integer);
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var
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n: Integer;
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begin
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if FEditorstyle = TsDBcombox then
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begin
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n := Length(comEditors);
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if ItemIndex< n then comEditors[ItemIndex].Items.Clear;
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end
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else if FEditorstyle = TsDBEdit then
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begin
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n := Length(edEditors);
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if ItemIndex< n then edEditors[ItemIndex].Hint:='';;
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end
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else if FEditorstyle = TsDBMemo then
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begin
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n := Length(MemoEditors);
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if ItemIndex< n then MemoEditors[ItemIndex].Hint:='';;
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end;
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end;
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constructor TDBPanel.Create(AOwner: TComponent);
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begin
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Inherited Create(AOWner);
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FLeft :=10;
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FTop := 10;
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maxTextLen := 100;
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maxLabelLen := 100;
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FLineHeight := 15;
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end;
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{ 创建各字段的数据输入控件的方法}
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procedure TDBPanel.CreateEditors(DS: TDataSource; ColCount: Integer);
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var
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i, n, RowCount: Integer;
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TextHeight: Integer;
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begin
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if DataSource = nil then exit;
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if not DataSource.DataSet.Active then exit;
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n := DataSource.DataSet.RecordCount;
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if n > 0 then
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begin
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DataSource.DataSet.DisableControls;
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if maxLabelLen < maxTextLen then
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maxTextLen := maxLabelLen;
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{ 计算最大的标题长度及显示长度}
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DataSource.DataSet.First;
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{ 计算高度}
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TextHeight := Canvas.TextHeight(DataSource.DataSet.Fields[0].DisplayLabel) + FLineHeight; //10;
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{ 计算行列数}
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if (FColumns = 0) or (FColumns <> ColCount) then FColumns := ColCount;
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RowCount := n div Columns;
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if n mod Columns <> 0 then inc(RowCount);
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{ 分配内存}
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FreeEditors;
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SetLength(Labels,n);
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SetLength(ProgressBars,n);
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SetLength(ProgressEditor,n);
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if FEditorstyle = TsDBcombox then
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SetLength(comEditors,n)
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else if FEditorstyle = TsDBEdit then
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SetLength(edEditors,n)
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else
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SetLength(MemoEditors,n);
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{ 创建滚动盒}
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FScrollBox := TScrollBox.Create(Owner);
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FScrollBox.Visible := False;
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FScrollBox.Parent := Self;
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FScrollBox.Align := alClient;
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{ 创建编辑}
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for i := 0 to n - 1 do
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begin
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{ 创建标题}
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Labels[i] := TDBText.Create(Owner);
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Labels[i].visible := FTitleVisible;
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Labels[i].Parent := FScrollBox;
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Labels[i].DataField := DataField_Title;
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Labels[i].DataSource := DataSource;
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Labels[i].Left := FLeft + (maxLabelLen + 36) * (i div RowCount)+16; //+maxTextLen
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if FEditorstyle = TsDBMemo then
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begin
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Labels[i].Width := maxLabelLen;
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Labels[i].Top := FTop + (i mod RowCount) * (TextHeight*4+10) + 2;
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end
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else
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begin
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Labels[i].Top := FTop + (i mod RowCount) * (TextHeight*2+10) + 2;
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Labels[i].Width := maxLabelLen;
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end;
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{ 创建进度条数据对象}
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ProgressEditor[i] := TDBedit.Create(Owner);
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ProgressEditor[i].visible := False;
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ProgressEditor[i].Parent := FScrollBox;
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ProgressEditor[i].DataField := DataField_Progress;
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ProgressEditor[i].DataSource := DataSource;
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ProgressEditor[i].OnChange := AProgressEditorChange;
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{ 创建信息显示数据对象}
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if FEditorstyle = TsDBcombox then
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begin
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comEditors[i] := TDBComboBox.Create(Owner);
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comEditors[i].Parent := FScrollBox; //Self;
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comEditors[i].Left := Labels[i].Left; //+ Labels[i].Width;
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comEditors[i].Width := maxTextLen;
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comEditors[i].Top := Labels[i].Top+20;
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comEditors[i].DataSource := DataSource;
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comEditors[i].DataField := DataField_Editor;
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comEditors[i].OnKeyPress := AKeyPress;
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comEditors[i].OnKeyDown := AKeyDown;
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ProgressBars[i] := TProgressBar.Create(Owner);
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ProgressBars[i].Parent := FScrollBox;
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ProgressBars[i].Orientation := pbHorizontal;
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ProgressBars[i].Left := comEditors[i].Left;
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ProgressBars[i].Width := comEditors[i].Width;
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ProgressBars[i].Height := 10;
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ProgressBars[i].Top := comEditors[i].Top+comEditors[i].height+2;
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ProgressBars[i].Position := i*4
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end
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else if FEditorstyle = TsDBEdit then
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begin
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edEditors[i] := TDBedit.Create(Owner);
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edEditors[i].Parent := FScrollBox;
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edEditors[i].Left := Labels[i].Left; //+ Labels[i].Width;
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edEditors[i].Width := maxTextLen;
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edEditors[i].Top := Labels[i].Top+20;
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edEditors[i].DataSource := DataSource;
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edEditors[i].DataField := DataField_Editor;
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edEditors[i].OnKeyPress := AKeyPress;
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edEditors[i].OnKeyDown := AKeyDown;
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ProgressBars[i] := TProgressBar.Create(Owner);
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ProgressBars[i].Parent := FScrollBox;
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ProgressBars[i].Orientation := pbHorizontal;
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ProgressBars[i].Left := edEditors[i].Left;
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ProgressBars[i].Width := edEditors[i].Width;
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ProgressBars[i].Height := 10;
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ProgressBars[i].Top := edEditors[i].Top+edEditors[i].height+2;;
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ProgressBars[i].Position := i*4
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end
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else
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begin
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MemoEditors[i] := TDBmemo.Create(Owner);
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MemoEditors[i].Parent := FScrollBox;
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MemoEditors[i].Left := Labels[i].Left;
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MemoEditors[i].Width := maxTextLen;
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MemoEditors[i].Top := Labels[i].Top+20;
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MemoEditors[i].DataSource := DataSource;
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MemoEditors[i].DataField := DataField_Editor;
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MemoEditors[i].OnKeyPress := AKeyPress;
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MemoEditors[i].OnKeyDown := AKeyDown;
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ProgressBars[i] := TProgressBar.Create(Owner);
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ProgressBars[i].Parent := FScrollBox;
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ProgressBars[i].Orientation := pbVertical;
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ProgressBars[i].Left := MemoEditors[i].Left + MemoEditors[i].Width +1;
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ProgressBars[i].Width := 10;
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ProgressBars[i].Height := MemoEditors[i].Height;
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ProgressBars[i].Top := MemoEditors[i].Top;
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ProgressBars[i].Position := i*4
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end;
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if not DataSource.DataSet.Eof then
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DataSource.DataSet.next;
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end;
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DataSource.DataSet.EnableControls;
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FScrollBox.Visible := True;
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end;
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end;
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destructor TDBPanel.Destroy;
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begin
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FreeEditors;
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Inherited Destroy;
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end;
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function TDBPanel.comEditor(Index: Integer): TDBComboBox;
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begin
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if Index< Length(comEditors) then Result := comEditors[Index]
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else Result := nil;
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end;
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function TDBPanel.edEditor(Index: Integer): TDBedit;
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begin
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if Index < Length(edEditors) then Result := edEditors[Index]
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else Result := nil;
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end;
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function TDBPanel.MemoEditor(Index: Integer): TDBMemo;
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begin
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if Index< Length(MemoEditors) then Result := MemoEditors[Index]
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else Result := nil;
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end;
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// 内存的释放是要有顺序的！必须以创建的相反的顺序进行！尤其是当组件之间有父子关系时
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procedure TDBPanel.FreeEditors;
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begin
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if FScrollBox <> nil then
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begin
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comEditors := nil;
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edEditors := nil;
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MemoEditors := nil;
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FScrollBox.Free;
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FScrollBox := nil;
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end;
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end;
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end.
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