eraseCDKViewer3

Usage

Overview

The Cdk viewer widget creates a file viewer widget. This widget allows a user to interact with a file. It does NOT allow editing, this is view only. The following are functions which create or manipulate the Cdk viewer list widget.

Available functions

activateCDKViewer

activates the viewer widget and lets the user interact with the widget.

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The parameter viewer is a pointer to a non-NULL viewer widget.

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If the actions parameter is passed with a non-NULL value, the characters in the array will be injected into the widget.

To activate the widget interactively pass in a NULL pointer for actions.

If the character entered into this widget is RETURN then this function will return a value from 0 to the number of buttons -1, representing the button selected. It will also set the widget data exitType to vNORMAL.

If the character entered into this widget was ESCAPE, then the widget will return a value of -1 and the widget data exitType will be set to vESCAPE_HIT.

cleanCDKViewer

clears the information from the window.

destroyCDKViewer

removes the widget from the screen and frees memory the object used.

drawCDKViewer

draws the viewer widget on the screen. If the box option is true, the widget is drawn with a box.

eraseCDKViewer

removes the widget from the screen. This does NOT destroy the widget.

getCDKViewerBox

returns true if the widget will be drawn with a box around it.

getCDKViewerHighlight

returns the attribute of the buttons.

getCDKViewerInfo

returns the contents of the viewer widget.

getCDKViewerInfoLine

returns true if the information line is on.

getCDKViewerTitle

returns the title of the widget.

moveCDKViewer

function moves the given widget to the given position.

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The parameters xpos and ypos are the new position of the widget.

The parameter xpos may be an integer or one of the pre-defined values TOP, BOTTOM, and CENTER.

The parameter ypos may be an integer or one of the pre-defined values LEFT, RIGHT, and CENTER.

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The parameter relative states whether the xpos/ypos pair is a relative move or an absolute move.

For example, if xpos = 1 and ypos = 2 and relative = TRUE, then the widget would move one row down and two columns right. If the value of relative was FALSE, then the widget would move to the position (1,2).

Do not use the values TOP, BOTTOM, LEFT, RIGHT, or CENTER when relative = TRUE. (weird things may happen).

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The final parameter refresh is a boolean value which states whether the widget will get refreshed after the move.

*newCDKViewer

function creates a viewer widget and returns a pointer to it. Parameters:

screen

is the screen you wish this widget to be placed in.

xpos

controls the placement of the object along the horizontal axis. It may be an integer or one of the pre-defined values LEFT, RIGHT, and CENTER.

ypos

controls the placement of the object along the vertical axis. It may be an integer or one of the pre-defined values TOP, BOTTOM, and CENTER.

height and

width

are the height and width of the viewer window.

buttons

is an array of the button labels which are to be attached to the viewer on the bottom.

buttonCount

is the number of buttons in buttons.

buttonHighlight

is the highlight attribute of the currently selected button.

box

is true if the widget should be drawn with a box around it.

shadow

turns the shadow on or off around this widget.

If the widget could not be created then a NULL pointer is returned.

positionCDKViewer

allows the user to move the widget around the screen via the cursor/keypad keys. See cdk_position (3) for key bindings.

setCDKViewer

lets the programmer modify several elements of an existing viewer widget.

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title is the title to be displayed on the top of the viewer.

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list is the information to display,

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listSize states how many rows there are in the list array. If listSize is negative, list is scanned to find its length, including files which will be included via embedded links.

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buttonAttribute states the attribute of the current highlighted button.

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The boolean parameter interpret tells the viewer to interpret the contents of list for Cdk display command.

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The showLineInfo boolean flag tells the viewer to show to show the line number and percentage in the top left corner of the viewer window.

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The parameters box and shadow are the same as in the function description of newCDKViewer.

setCDKViewerBackgroundAttrib

sets the background attribute of the widget.

The parameter attribute is a curses attribute, e.g., A_BOLD.

setCDKViewerBackgroundColor

sets the background color of the widget.

The parameter color is in the format of the Cdk format strings.

See cdk_display (3).

setCDKViewerBox

sets whether the widget will be drawn with a box around it.

setCDKViewerBoxAttribute

sets the attribute of the box.

setCDKViewerHighlight

sets the highlight attribute of the buttons on the widget.

setCDKViewerHorizontalChar

sets the horizontal drawing character for the box to the given character.

setCDKViewerInfo

sets the contents of the viewer widget.

See setCDKViewer for parameter descriptions.

setCDKViewerInfoLine

turns on/off the information line in the top left hand corner of the widget. If the value of showInfoLine is TRUE, the information line will be displayed. If it is FALSE it won't.

setCDKViewerLLChar

sets the lower left hand corner of the widget's box to the given character.

setCDKViewerLRChar

sets the lower right hand corner of the widget's box to the given character.

setCDKViewerTitle

sets the title of the widget.

setCDKViewerULChar

sets the upper left hand corner of the widget's box to the given character.

setCDKViewerURChar

sets the upper right hand corner of the widget's box to the given character.

setCDKViewerVerticalChar

sets the vertical drawing character for the box to the given character.

Key bindings

When the widget is activated there are several default key bindings which will help the user enter or manipulate the information quickly. The following table outlines the keys and their actions for this widget.