Class XbpQuickBrowse() Foundation
Class function of the XbpQuickBrowse class
The XbpQuickBrowse() class is used for fast browsing of tabular data. The major difference to the XbpBrowse() class is that an XbpQuickBrowse object has a higher level of autonomy than an XbpBrowse object and, therefore, less possibilities to configure the appearance of the browser. Instead of embedding XbpColumn() objects for displaying the columns in the browser, an XbpQuickBrowse object uses a single object of the XbpMultiCellGroup() class to visualize all data columns of the browser. This reduces the GUI resources required by the browser drastically and allows for a fast creation of the browse object.
The next major difference to the XbpBrowse() class is the lack of most of the navigation code blocks which operate directly on the data source of the browser, be it an array or a database opened in a work area. The data source for an XbpQuickBrowse object must be an object of the DacPagedDataStore() class that needs to be assigned to the instance variable :dataLink before the :create() method is called for the XbpQuickBrowse object.
When the XbpQuickBrowse object is created and visible, it communicates with its data source object stored in :dataLink and calls the appropriate methods for navigating the record pointer of the data source when a keyboard or mouse event occurs within the browser. The following events are recognized by an XbpQuickBrowse object:
|xbeK_LEFT||One column to the left|
|xbeK_RIGHT||One column to the right|
|xbeK_UP||Moves browse cursor to previous record|
|xbeK_DOWN||Moves browse cursor to next record|
|xbeK_PGUP||Displays previous page|
|xbeK_DOWN||Displays next page|
|xbeK_CTRL_UP||Scrolls the browse display one record up without moving the browse cursor|
|xbeK_CTRL_DOWN||Scrolls the browse display one record down without moving the browse cursor|
|xbeK_CTRL_PGUP||Displays first page|
|xbeK_CTRL_PGDN||Displays last page|
|xbeK_HOME||Displays first column|
|xbeK_END||Displays last column|
|xbeK_RETURN||Evaluates the :itemSelected code block|
|xbeM_LbDown||Moves browse cursor to mouse pointer and evaluates the :itemMarked code block|
|xbeM_LbDblClick||Evaluates the :itemSelected code block|
The instance variables in this group configure system resources. If changes are made to the default values, they must be made before the :create() method is executed or :configure() must be called to activate the changes.
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