4D Doc Center : PV Get row height

4D View v13

PV Get row height


PV Get row height ( area ; row ) -> Function result

Parameter	Type	Description
area	Longint	4D View area
row	Longint	Row number
Function result	Integer	Row height in pixels

Description

The PV Get row height command returns the height (in pixels) of the specified row.

Example 1

Refer to the example for the PV SET COLUMNS WIDTH command.

Since 4D version 2004.5, the Print form command can be used to print 4D View areas. Generally, these areas are printed with a fixed height. The following example shows how to use the print commands of 4D and the PV Get row height command in order to vary the printing height of the 4D View area depending on its contents.

Here is the form method called by the Print form command:

 If(Form event=On Printing Detail)

    GET OBJECT RECT(4DViewarea;$left;$top;$right;$bottom)

    $posmarker:=Get print marker(Form Detail)

    $areaheight:=$bottom-$top

    $newheight:=4DViewSizeCalcul

  ` 4DViewSizeCalcul returns the height of the 4D View area depending on its contents

  ` This method is shown below

    $offset:=$newheight-$areaheight

    MOVE OBJECT(4DViewarea;0;0;0;$offset)

    SET PRINT MARKER(Form Detail;$posmarker+$offset)

 End if

The 4DViewSizeCalcul method is as follows:

 $area:=PV New offscreen area

 PV BLOB TO AREA($area;[Table 1]View_)

 PV EXECUTE COMMAND($area;pv cmd edit go to last cell)

 PV GET CURRENT CELL($area;$column;$row)

 $height:=0

 For($i;1;$row)

    $rowHeight:=PV Get row height($area;$i)

    $height:=$height+$rowHeight

 End for

 PV DELETE OFFSCREEN AREA($area)

 $0:=Trunc($height*0.75;0)

4D v13

PV Get row height

PV Get row height

Description

Example 1

Example 2