Difference between revisions of "TListView"

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Sorting is (typically?) applied when using '''vsReport''' ViewStyle. Sorting might be a time consuming process or a larger data scale (when comparison of items takes a considerable time).
 
Sorting is (typically?) applied when using '''vsReport''' ViewStyle. Sorting might be a time consuming process or a larger data scale (when comparison of items takes a considerable time).
  
Typically the sorting can be requested by a user. Whenever a user clicks on a column header, that requires to either sort (initially ascendancy) or to switch to the opposite sorting order (either from ascendant to descendant, or back). It's not a rule, but a common expectation. For some data sets selecting sorting might not make any sense. '''AutoSort''' the property of TListview controls, if the listview should be sorted automatically, as soon as user clicks on a column header.
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Typically the sorting can be requested by a user. Whenever a user clicks on a column header, that requires to either sort (initially ascendancy) or to switch to the opposite sorting order (either from ascendant to descendant, or back). It's not a rule, but a common expectation. For some data sets selecting sorting might not make any sense. '''AutoSort''' (default value is true)the property of TListview controls, if the listview should be sorted automatically, as soon as user clicks on a column header.
  
 
'''AlphaSort''' is a convenience method, that performs ascending sort based on the text of the first column (index 0)
 
'''AlphaSort''' is a convenience method, that performs ascending sort based on the text of the first column (index 0)

Revision as of 16:50, 9 January 2020

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TListView tlistview.png is a visible component on the Common Controls tab of the Component Palette that provides a list view of its associated Items. Items can be represented by an icon from each of the associated TImageLists: SmallImages, LargeImages and StateImages.

Notes

  • GetNextItem() requires StartItem to be provided. This is incompatible with Delphi's GetNextItem(), where startItem is allowed to be nil, which will perform the search from the relative (direction driven) start.

Sorting

Sorting is (typically?) applied when using vsReport ViewStyle. Sorting might be a time consuming process or a larger data scale (when comparison of items takes a considerable time).

Typically the sorting can be requested by a user. Whenever a user clicks on a column header, that requires to either sort (initially ascendancy) or to switch to the opposite sorting order (either from ascendant to descendant, or back). It's not a rule, but a common expectation. For some data sets selecting sorting might not make any sense. AutoSort (default value is true)the property of TListview controls, if the listview should be sorted automatically, as soon as user clicks on a column header.

AlphaSort is a convenience method, that performs ascending sort based on the text of the first column (index 0)

See also


LCL Components
Component Tab Components
Standard TMainMenu • TPopupMenu • TButton • TLabel • TEdit • TMemo • TToggleBox • TCheckBox • TRadioButton • TListBox • TComboBox • TScrollBar • TGroupBox • TRadioGroup • TCheckGroup • TPanel • TFrame • TActionList
Additional TBitBtn • TSpeedButton • TStaticText • TImage • TShape • TBevel • TPaintBox • TNotebook • TLabeledEdit • TSplitter • TTrayIcon • TControlBar • TFlowPanel • TMaskEdit • TCheckListBox • TScrollBox • TApplicationProperties • TStringGrid • TDrawGrid • TPairSplitter • TColorBox • TColorListBox • TValueListEditor
Common Controls TTrackBar • TProgressBar • TTreeView • TListView • TStatusBar • TToolBar • TCoolBar • TUpDown • TPageControl • TTabControl • THeaderControl • TImageList • TPopupNotifier • TDateTimePicker
Dialogs TOpenDialog • TSaveDialog • TSelectDirectoryDialog • TColorDialog • TFontDialog • TFindDialog • TReplaceDialog • TTaskDialog • TOpenPictureDialog • TSavePictureDialog • TCalendarDialog • TCalculatorDialog • TPrinterSetupDialog • TPrintDialog • TPageSetupDialog
Data Controls TDBNavigator • TDBText • TDBEdit • TDBMemo • TDBImage • TDBListBox • TDBLookupListBox • TDBComboBox • TDBLookupComboBox • TDBCheckBox • TDBRadioGroup • TDBCalendar • TDBGroupBox • TDBGrid • TDBDateTimePicker
Data Access TDataSource • TCSVDataSet • TSdfDataSet • TBufDataset • TFixedFormatDataSet • TDbf • TMemDataset
System TTimer • TIdleTimer • TLazComponentQueue • THTMLHelpDatabase • THTMLBrowserHelpViewer • TAsyncProcess • TProcessUTF8 • TProcess • TSimpleIPCClient • TSimpleIPCServer • TXMLConfig • TEventLog • TServiceManager • TCHMHelpDatabase • TLHelpConnector
Misc TColorButton • TSpinEdit • TFloatSpinEdit • TArrow • TCalendar • TEditButton • TFileNameEdit • TDirectoryEdit • TDateEdit • TTimeEdit • TCalcEdit • TFileListBox • TFilterComboBox • TComboBoxEx • TCheckComboBox • TButtonPanel • TShellTreeView • TShellListView • TXMLPropStorage • TINIPropStorage • TJSONPropStorage • TIDEDialogLayoutStorage • TMRUManager • TStrHolder
LazControls TCheckBoxThemed • TDividerBevel • TExtendedNotebook • TListFilterEdit • TListViewFilterEdit • TLvlGraphControl • TShortPathEdit • TSpinEditEx • TFloatSpinEditEx • TTreeFilterEdit • TExtendedTabControl •
RTTI TTIEdit • TTIComboBox • TTIButton • TTICheckBox • TTILabel • TTIGroupBox • TTIRadioGroup • TTICheckGroup • TTICheckListBox • TTIListBox • TTIMemo • TTICalendar • TTIImage • TTIFloatSpinEdit • TTISpinEdit • TTITrackBar • TTIProgressBar • TTIMaskEdit • TTIColorButton • TMultiPropertyLink • TTIPropertyGrid • TTIGrid
SQLdb TSQLQuery • TSQLTransaction • TSQLScript • TSQLConnector • TMSSQLConnection • TSybaseConnection • TPQConnection • TPQTEventMonitor • TOracleConnection • TODBCConnection • TMySQL40Connection • TMySQL41Connection • TMySQL50Connection • TMySQL51Connection • TMySQL55Connection • TMySQL56Connection • TMySQL57Connection • TSQLite3Connection • TIBConnection • TFBAdmin • TFBEventMonitor • TSQLDBLibraryLoader
Pascal Script TPSScript • TPSScriptDebugger • TPSDllPlugin • TPSImport_Classes • TPSImport_DateUtils • TPSImport_ComObj • TPSImport_DB • TPSImport_Forms • TPSImport_Controls • TPSImport_StdCtrls • TPSCustomPlugin
SynEdit TSynEdit • TSynCompletion • TSynAutoComplete • TSynMacroRecorder • TSynExporterHTML • TSynPluginSyncroEdit • TSynPasSyn • TSynFreePascalSyn • TSynCppSyn • TSynJavaSyn • TSynPerlSyn • TSynHTMLSyn • TSynXMLSyn • TSynLFMSyn • TSynDiffSyn • TSynUNIXShellScriptSyn • TSynCssSyn • TSynPHPSyn • TSynTeXSyn • TSynSQLSyn • TSynPythonSyn • TSynVBSyn • TSynAnySyn • TSynMultiSyn • TSynBatSyn • TSynIniSyn • TSynPoSyn
Chart TChart • TListChartSource • TRandomChartSource • TUserDefinedChartSource • TCalculatedChartSource • TDbChartSource • TChartToolset • TChartAxisTransformations • TChartStyles • TChartLegendPanel • TChartNavScrollBar • TChartNavPanel • TIntervalChartSource • TDateTimeIntervalChartSource • TChartListBox • TChartExtentLink • TChartImageList
IPro TIpFileDataProvider • TIpHtmlDataProvider • TIpHttpDataProvider • TIpHtmlPanel
Virtual Controls TVirtualDrawTree • TVirtualStringTree • TVTHeaderPopupMenu