TcxEditRepositoryComboBoxItem Class

A repository item that stores combo box settings.

Declaration

TcxEditRepositoryComboBoxItem = class(
    TcxEditRepositoryItem
)

Remarks

A combo box editor allows users to select an option in a drop-down list.

The TcxEditRepositoryComboBoxItem class overrides the Properties property that allows you to access and customize combo box settings.

Edit Repository Items and Standalone Editors

Edit repository items are useful when you need to share the same settings between multiple editors of the same type. To accomplish this goal, you can assign the same edit repository item to RepositoryItem properties of all target editors.

Edit Repository Items and Container Controls

A container control item (such as a toolbar edit item or a column (or any other data item) in a Data Grid, Vertical Grid, or Tree List control) can embed an in-place editor shipped with the ExpressEditors Library. An in-place editor exists (and, therefore, has its own WinAPI handle) only when the target container control item is being edited. Otherwise, the container control item displays a static editor image for resource usage optimization.

Create a Combo Box Repository Item at Design Time

To create a combo box repository item at design time, double-click an edit repository component to invoke its collection editor.

The collection editor dialog allows you to manage repository items. Click the Add… button to invoke a repository item creation dialog.

Select the ComboBox item and click the Ok button to create a combo box repository item.

Create a Combo Box Repository Item in Code

The following code example creates a combo box repository item, customizes editor settings, and assigns the created repository item to two existing unbound combo box editors:

Delphi

uses cxEdit, cxEditRepositoryItems;
// ...
var
  AComboBoxRepositoryItem: TcxEditRepositoryComboBoxItem;
  ARepositoryItem: TcxEditRepositoryItem;
begin
  ARepositoryItem := cxEditRepository1.CreateItem(TcxEditRepositoryComboBoxItem);
  AComboBoxRepositoryItem := ARepositoryItem as TcxEditRepositoryComboBoxItem;
  // Sets the number of simultaneously visible items in a drop-down window to 5
  AComboBoxRepositoryItem.Properties.DropDownRows := 5;
  // Forces the editor to display its drop-down window every time a user clicks the editor
  AComboBoxRepositoryItem.Properties.ImmediatePopup := True;
  // Assigns the created repository item to two existing unbound combo box editors
  cxComboBox1.RepositoryItem := AComboBoxRepositoryItem;
  cxComboBox2.RepositoryItem := AComboBoxRepositoryItem;
end;

C++

#include "cxEdit.hpp"
#include "cxEditRepositoryItems.hpp"
// ...
  TcxEditRepositoryComboBoxItem *AComboBoxRepositoryItem;
  TcxEditRepositoryItem *ARepositoryItem;
  // ...
  ARepositoryItem = cxEditRepository1->CreateItem(__classid(TcxEditRepositoryComboBoxItem));
  AComboBoxRepositoryItem = dynamic_cast<TcxEditRepositoryComboBoxItem*>(ARepositoryItem);
  // Sets the number of simultaneously visible items in a drop-down window to 5
  AComboBoxRepositoryItem->Properties->DropDownRows = 5;
  // Forces the editor to display its drop-down window every time a user clicks the editor
  AComboBoxRepositoryItem->Properties->ImmediatePopup = true;
  // Assigns the created repository item to two existing unbound combo box editors
  cxComboBox1->RepositoryItem = AComboBoxRepositoryItem;
  cxComboBox2->RepositoryItem = AComboBoxRepositoryItem;

Combo Box Repository Item Deletion

To delete all combo box repository items in a TcxEditRepository component, call its RemoveItems procedure and pass a reference to the TcxEditRepositoryComboBoxItem class as a parameter.

If you need to delete an individual combo box repository item, release it directly in code (call the Free procedure in Delphi or use the delete keyword in C++Builder).

Inheritance

TObject

TPersistent

TComponent

TcxEditRepositoryItem

TcxEditRepositoryComboBoxItem