aboutehlib3_0.txt

最新的 DBGRIDEH4.0

About EhLib 3


What's new in version 3.0

  In TDBDateTimeEditEh

   + New values in TDateTimeKindEh type (property Kind).
       TDateTimeKindEh = (dtkDateEh, dtkTimeEh, dtkDateTimeEh, dtkCustomEh);
   + Added EditFormat property. Now you can type custom date/time format using
     next format elements: 'YY', 'YYYY', 'MM', 'DD', 'HH', 'NN', 'SS'.


  Library is divided to design-time and run-time packages.
  EhLib[XX] - run-time package and DclEhLib[X] - design-time packages, 
  where [XX] is digit number of VCL version:
  [40] for Delphi 4, [50] for Delphi 5, etc;
  And EhLibB[XX] with DclEhLibB[XX] for C++ Builder.


  Upon installation, all components is placed to the separate page in
  components palette with name - 'EhLib'.
  Note that Delphi IDE does not move components to the new default 
  place when you install new version of same component(s). So if you 
  already has EhLib installed, then installation new (3.0) version 
  does not move EhLib components to the 'EhLib' page on components palette.	
  To force Delphi IDE to move compontes to the default place on 
  components palette do next:
  Open menu: Component->Configure Palette.
             Select '[All]' line in Pages listbox.
             Click 'Default Pages' button.


  New componetns: TPropStorageEh, TIniPropStorageManEh, TRegPropStorageManEh.
  Components realize technology to store components properties to/from settings 
  storage such as ini files, registry etc.

  Current version supports components to store/restore in/from 
  ini files and registry.
  Base component of the given technology is the TPropStorageEh. 
  Place this component on the form, component properties of which 
  you want to save in the storage.
  Double click on the component at design-time to open properties 
  storage editor window. 
  In the tree of properties you can select required properties 
  for storing. Properties list is a list of all published properties 
  or declared in DefineProperty function of components with 
  the exclusion of properties of TCollection class. Further to 
  the list of all elements of the collection, the tree of properties 
  will contain <ForAllItems> subproperty, when you select subproperty in the given 
  branch, the component will save corresponding subproperty for each 
  element of the collection.

  Component TPropStorageEh can save/restore property values in the 
  stream, however for redirect flow in the storage necessary 
  to execute one of the following actions.

  1. Place component that inherited from TPropStorageManagerEh on the form. 
  In this version there are present such components, this is
  TIniPropStorageManEh and TRegPropStorageManEh.
  Set properties of these component and assign 
  TPropStorageEh.StorageManager property to this component.

  2. Or you can once write a code to register the global component -
  DefaultPropStorageManager. All TPropStorageEh components in which  
  StorageManager property is not assigned will use 
  DefaultPropStorageManager manager for redirecting flow of the 
  property values to the storage.

  Code to register the global component can look like this:

  ----------- MainUnit.Pas--------
  ......
  
  var
    IniPropStorageMan: TIniPropStorageManEh;

  initialization
   
    IniPropStorageMan := TIniPropStorageManEh.Create(nil);
    IniPropStorageMan.IniFileName := 'MyIniFile.Ini';
    SetDefaultPropStorageManager(IniPropStorageMan);
  end.
  ----------------------------



 + Added (in source included version only) design-time ClientDataSet edit window
   See detail info in AdvTech\CDSDesign\readme.txt dir.

  Contain design-time ClientDataSet edit window,
  It inherited from TFieldsEditor window, include all features of 
  FieldsEditor and allow to edit data in ClientDataSet at 
  design-time. You can manually fill data at design-time in 
  disconnected ClientDataSet without loading data from file or
  copying from another dataset.