cdk_viewer(3)

NAME
newCDKViewer, activateCDKViewer, setCDKViewer, setCDKViewerInfo, getCDKViewerInfo, setCDKViewerTitle, getCDKViewerTitle, setCDKViewerHighlight, getCDKViewerHighlight, setCDKViewerInfoLine, getCDKViewerInfoLine, setCDKViewerBox, getCDKViewerBox, setCDKViewerULChar, setCDKViewerURChar, setCDKViewerLLChar, setCDKViewerLRChar, setCDKViewerVerticalChar, setCDKViewerHorizontalChar, setCDKViewerBoxAttribute, setCDKViewerBackgroundColor, drawCDKViewer, eraseCDKViewer, destroyCDKViewer - Creates a managed curses viewer list widget.

SYNOPSIS

cc [ flag ... ] file ... -lcdk [ library ... ]

#include <cdk.h>

CDKVIEWER *newCDKViewer (CDKSCREEN *cdkscreen, int xpos, int ypos, int height, int width, char **buttonList, int buttonCount, chtype buttonHighlight, boolean box, boolean shadow);

int activateCDKViewer (CDKVIEWER *viewer);

void setCDKViewer (CDKVIEWER *viewer, char *title, char **info, int infoSize, chtype buttonAttribute, boolean interpret, boolean showLineInfo, boolean box);

void setCDKViewerInfo (CDKVIEWER *viewer, char **itemList, int listSize, boolean numbers);

int getCDKViewerInfo (CDKVIEWER *viewer, char **itemList);

void setCDKViewerTitle (CDKVIEWER *viewer, char *title);

int getCDKViewerTitle (CDKVIEWER *viewer);

void setCDKViewerHighlight (CDKVIEWER *viewer, chtype highlight);

chtype getCDKViewerHighlight (CDKVIEWER *viewer);

void setCDKViewerInfoLine (CDKVIEWER *viewer, boolean showInfoLine);

boolean getCDKViewerInfoLine (CDKVIEWER *viewer);

void setCDKViewerULChar (CDKVIEWER *,viewer, chtype character);

void setCDKViewerURChar (CDKVIEWER *,viewer, chtype character);

void setCDKViewerLLChar (CDKVIEWER *,viewer, chtype character);

void setCDKViewerLRChar (CDKVIEWER *,viewer, chtype character);

void setCDKViewerVerticalChar (CDKVIEWER *,viewer, chtype character);

void setCDKViewerHorizontalChar (CDKVIEWER *,viewer, chtype character);

void setCDKViewerBoxAttribute (CDKVIEWER *,viewer, chtype character);

void setCDKViewerBackgroundColor (CDKVIEWER *,viewer, char * color);

void moveCDKViewer (CDKVIEWEE *viewer, int box, int box, boolean relative, boolean refresh);

void positionCDKViewer (CDKVIEWEE *viewer);

void drawCDKViewer (CDKVIEWER *viewer, boolean box);

void eraseCDKViewer (CDKVIEWER *viewer);

void destroyCDKViewer (CDKVIEWER *viewer);

void bindCDKObject (EObjectType widgetType, void *object, chtype key, BINDFN function, void *data);

DESCRIPTION
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
CDKVIEWER *newCDKViewer (CDKSCREEN *screen, int xpos, int ypos, int height, int width, char **buttons, int buttonCount, chtype buttonHighlight, boolean box, boolean shadow);
    This function creates a pointer to a viewer widget. The screen parameter is the screen you wish this widget to be placed in. The parameter xpos controls the placement of the object along the horizontal axis. This parameter can accept an integer value or one of the pre-defined values of LEFT, RIGHT, and CENTER. The parameter ypos controls the placement of the object along the vertical axis. This parameter can accept an integer value or one of the pre-defined values of TOP, BOTTOM, and CENTER. The parameters height and width state how tall and wide the viewer window is to be. The buttons is an array of the button labels which are to be attached to the viewer on the bottom; buttonCount tells the viewer how many buttons there are. The parameter buttonHighlight is the highlight attribute of the currently selected button. The box parameter states whether the widget will be drawn with a box around it or not. The shadow parameter accepts a boolean value to turn the shadow on or off around this widget. If the widget could not be created then a NULL pointer is returned.
int activateCDKViewer (CDKVIEWER *viewer);
    This function activates the viewer widget and lets the user interact with the widget. The parameter viewer is a pointer to a non-NULL viewer widget. 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 structure member exitType to vNORMAL. If the character entered into this widget was ESCAPE then the widget will return a value of -1 and the structure member exitType will be set to vESCAPE_HIT.
void setCDKViewer (CDKVIEWER *viewer, char *title, char **info, int infoSize, chtype buttonAttribute, boolean interpret, boolean showLineInfo, boolean box);
    This function lets the programmer modify certain elements of an already defined viewer widget. The parameter title is the title to be displayed on the top of the viewer. The parameter info is the information to display, while infoSize states how many rows there are in the info array. The parameter buttonAttribute states the attribute of the current highlighted button. The boolean parameter interpret tells the viewer to interpret the contents of info for Cdk display command, or not. The showLineInfo boolean flag tells the viewer to show or not to show the line number and percentage in the top left corner of the viewer window. The parameters box and shadow are the same as in the function description of newCDKViewer.
int setCDKViewerInfo (CDKVIEWER *viewer, char **info, int infoSize, boolean interpret);
    This sets the contents of the viewer widget.
chtype **getCDKViewerInfo (CDKVIEWER *viewer, int *size);
    This returns the contents of the viewer widget.
void setCDKViewerTitle (CDKVIEWER *viewer, char *title);
    This sets the title of the widget.
chtype **getCDKViewerTitle (CDKVIEWER *viewer);
    This returns the title of the widget.
void setCDKViewerHighlight (CDKVIEWER *viewer, chtype buttonHighlight);
    This sets the highlight attribute of the buttons on the widget.
chtype getCDKViewerHighlight (CDKVIEWER *viewer);
    This returns the attribute of the buttons.
void setCDKViewerInfoLine (CDKVIEWER *viewer, boolean showLineInfo);
    This 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.
boolean getCDKViewerInfoLine (CDKVIEWER *viewer);
    This returns a boolena value stating if the information line is on or off.
void setCDKViewerBox (CDKVIEWER *viewer, boolean Box);
    This sets whether or not the widget will be draw with a box around it.
boolean getCDKViewerBox (CDKVIEWER *viewer);
    This returns whether or not the widget will be drawn with a box around it.
void setCDKViewerULChar (CDKVIEWER *viewer, chtype character);
    This function sets the upper left hand corner of the widgets box to the given character.
void setCDKViewerURChar (CDKVIEWER *viewer, chtype character);
    This function sets the upper right hand corner of the widgets box to the given character.
void setCDKViewerLLChar (CDKVIEWER *viewer, chtype character);
    This function sets the lower left hand corner of the widgets box to the given character.
void setCDKViewerLRChar (CDKVIEWER *viewer, chtype character);
    This function sets the lower right hand corner of the widgets box to the given character.
void setCDKViewerVerticalChar (CDKVIEWER *viewer, chtype character);
    This function sets the vertical drawing character for the box to the given character.
void setCDKViewerHorizontalChar (CDKVIEWER *viewer, chtype character);
    This function sets the horizontal drawing character for the box to the given character.
void setCDKViewerBoxAttribute (CDKVIEWER *viewer, chtype attribute);
    This function sets the attribute of the box.
void setCDKViewerBackgroundColor (CDKVIEWER *viewer, char *color);
    This sets the background color of the widget. The parameter color is in the format of the Cdk format strings. To get more information look at the cdk_display manual page.
void moveCDKViewer (CDKVIEWEE *viewer, int xpos, int ypos, boolean relative, boolean refresh);
    This function moves the given widget to the given position. The parameters xpos and ypos is the new position of the widget. The parameter xpos can accept an integer value or one of the pre-defined values of TOP, BOTTOM, and CENTER. The parameter ypos can accept an integer value or one of the pre-defined values of LEFT, RIGHT, and CENTER. 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 of TOP, BOTTOM, LEFT, RIGHT, or CENTER when relative = TRUE. (weird things may happen). The final parameter refresh is a boolean value which states whether the widget will get refreshed after the move or not.
void positionCDKViewer (CDKVIEWEE *viewer);
    This function allows the user to move the widget around the screen via the cursor/keypad keys. The following key bindings can be used to move the widget around the screen.

    Key Bindings
        Key          Action
        Up Arrow     Moves the widget up one line.
        Down Arrow   Moves the widget down one line.
        Left Arrow   Moves the widget left one column
        Right Arrow  Moves the widget right one column
        Keypad-1     Moves the widget down one line
                     and left one column.
        Keypad-2     Moves the widget down one line.
        Keypad-3     Moves the widget down one line
                     and right one column.
        Keypad-4     Moves the widget left one column
        Keypad-5     Centers the widget both vertically
                     and horizontally.
        Keypad-6     Moves the widget right one column
        Keypad-7     Moves the widget up one line
                     and left one column.
        Keypad-8     Moves the widget up one line.
        Keypad-9     Moves the widget up one line
                     and right one column.
        t            Moves the widget to the top of the screen.
        b            Moves the widget to the bottom of the screen.
        l            Moves the widget to the left of the screen.
        r            Moves the widget to the right of the screen.
        c            Centers the widget between the left and
                     right of the window.
        C            Centers the widget between the top and
                     bottom of the window.
        Escape       Returns the widget to its original position.
        Return       Exits the function and leaves the widget
                     where it was.

        Keypad means that if the keyboard you are using has a keypad, then the Num-Lock light has to be on in order to use the keys as listed. (The numeric keys at the top of the keyboard will work as well.)

        void drawCDKViewer (CDKVIEWER *viewer, boolean box);
            This function draws the viewer widget on the screen. The box option draws the widget with or without a box.
        void eraseCDKViewer (CDKVIEWER *viewer);
            This function removes the widget from the screen. This does NOT destroy the widget.
        void destroyCDKViewer (CDKVIEWER *viewer);
            This function removes the widget from the screen and frees up any memory the object may be using.
        void bindCDKObject (EObjectType widgetType, void *object, char key, BINDFN function, void *data);
            This function allows the user to create special key bindings. The widgetType parameter is a defined type which states what Cdk object type is being used. To learn more about the type EObjectType read the cdk_binding manual page. The object parameter is the pointer to the widget object. The key is the character to bind. The function is the function type. To learn more about the key binding call-back function types read the cdk_binding manual page. The last parameter data is a pointer to any data that needs to get passed to the call-back function.

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.

    Key          Action
    Left Arrow  Shifts the contents of the
                viewer one character left.
    Right Arrow Shifts the contents of the
                viewer one character left
    Up Arrow    Scrolls the contents of the
                viewer one line up.
    Down Arrow  Scrolls the contents of the
                viewer one line up.
    Prev Page   Moves one page backwards.
    Ctrl-B      Moves one page backwards.
    B           Moves one page backwards.
    b           Moves one page backwards.
    Next Page   Moves one page forwards.
    Ctrl-F      Moves one page forwards.
    Space       Moves one page forwards.
    F           Moves one page forwards.
    f           Moves one page forwards.
    Home        Shifts the whole list to
                the far left.
    |           Shifts the whole list to
                the far left.
    End         Shifts the whole list to
                the far right
    $           Shifts the whole list to
                the far right.
    g           Moves to the first line
                in the viewer.
    1           Moves to the first line
                in the viewer.
    G           Moves to the last line
                in the viewer.
    L           Moves half the distance
                to the end of the viewer.
    l           Moves half the distance
                to the top of the viewer.
    ?           Searches up for a pattern.
    /           Searches down for a pattern.
    n           Repeats last search.
    :           Jumps to a given line.
    i           Displays file statistics.
    s           Displays file statistics.
    Tab         Switches buttons.
    Return      Exits the widget and returns
                an integer value representing
                which button was selected. This
                also sets the structure member
                exitType in the widget pointer
                to the value of vNORMAL.
    Escape      Exits the widget and returns -1.
                This also sets the structure
                member exitType in the
                widget pointer to the value of
                vESCAPE_HIT.
    Ctrl-L      Refreshes the screen.

SEE ALSO
cdk(3), cdk_binding(3), cdk_display(3), cdk_screen(3)

NOTES

The header file <cdk.h> automatically includes the header files <curses.h>, <stdlib.h>, <string.h>, <ctype.h>, <unistd.h>, <dirent.h>, <time.h>, <errno.h>, <pwd.h>, <grp.h>, <sys/stat.h>, and <sys/types.h>. The <curses.h> header file includes <stdio.h> and <unctrl.h>.

If you have Ncurses installed on your machine add -DNCURSES to the compile line to include the Ncurses header files instead.