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cdk_selection(3) Library Functions Manual cdk_selection(3) NAME cdk_selection - curses selection list widget. SYNOPSIS cc [ flag ... ] file ... -lcdk [ library ... ] #include <cdk.h> int activateCDKSelection ( CDKSELECTION *selection, chtype * actions); void destroyCDKSelection ( CDKSELECTION *selection); void drawCDKSelection ( CDKSELECTION *selection, boolean box); void eraseCDKSelection ( CDKSELECTION *selection); boolean getCDKSelectionBox ( CDKSELECTION *selection); int getCDKSelectionChoice ( CDKSELECTION *selection, int index); int *getCDKSelectionChoices ( CDKSELECTION *selection); int getCDKSelectionCurrent ( CDKSELECTION *selection); chtype getCDKSelectionHighlight ( CDKSELECTION *selection); int getCDKSelectionItems ( CDKSELECTION *selection, char **list); int getCDKSelectionMode ( CDKSELECTION *selection, int index); int *getCDKSelectionModes ( CDKSELECTION *selection); char *getCDKSelectionTitle ( CDKSELECTION *selection); int injectCDKSelection ( CDKSELECTION *selection, chtype input); void moveCDKSelection ( CDKSELECTION *selection, int xpos, int ypos, boolean relative, boolean refresh); CDKSELECTION *newCDKSelection ( CDKSCREEN *cdkscreen, int xpos, int ypos, int spos, int height, int width, const char *title, CDK_CONST char **selectionList, int selectionListLength, CDK_CONST char **choiceList, int choiceListLength, chtype highlight, boolean box, boolean shadow); void positionCDKSelection ( CDKSELECTION *selection); void setCDKSelection ( CDKSELECTION *selection, chtype highlight, int *defChoices, boolean box); void setCDKSelectionBackgroundAttrib ( CDKSELECTION *selection, chtype attribute); void setCDKSelectionBackgroundColor ( CDKSELECTION *selection, const char * color); void setCDKSelectionBox ( CDKSELECTION *selection, boolean boxWidget); void setCDKSelectionBoxAttribute ( CDKSELECTION *selection, chtype character); void setCDKSelectionChoice ( CDKSELECTION *selection, int index, int choice); void setCDKSelectionChoices ( CDKSELECTION *selection, int *choices); void setCDKSelectionCurrent ( CDKSELECTION *selection, intindex); void setCDKSelectionHighlight ( CDKSELECTION *selection, chtype highlight); void setCDKSelectionHorizontalChar ( CDKSELECTION *selection, chtype character); void setCDKSelectionItems ( CDKSELECTION *selection, CDK_CONST char **list, int listSize); void setCDKSelectionLLChar ( CDKSELECTION *selection, chtype character); void setCDKSelectionLRChar ( CDKSELECTION *selection, chtype character); void setCDKSelectionMode ( CDKSELECTION *selection, int index, int mode); void setCDKSelectionModes ( CDKSELECTION *selection, int *modes); void setCDKSelectionPostProcess ( CDKSELECTION *selection, PROCESSFN callback, void * data); void setCDKSelectionPreProcess ( CDKSELECTION *selection, PROCESSFN callback, void * data); void setCDKSelectionTitle ( CDKSELECTION *selection, const char *title); void setCDKSelectionULChar ( CDKSELECTION *selection, chtype character); void setCDKSelectionURChar ( CDKSELECTION *selection, chtype character); void setCDKSelectionVerticalChar ( CDKSELECTION *selection, chtype character); DESCRIPTION The Cdk selection widget creates a selection list. The following func- tions create or manipulate the Cdk selection list widget. AVAILABLE FUNCTIONS activateCDKSelection activates the selection widget and lets the user interact with the widget. o The parameter selection is a pointer to a non-NULL selection widget. o 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 or TAB then this function will return 1. 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 wid- get data exitType will be set to vESCAPE_HIT. destroyCDKSelection removes the widget from the screen and frees memory the object used. drawCDKSelection draws the selection widget on the screen. If the box parameter is true, the widget is drawn with a box. eraseCDKSelection removes the widget from the screen. This does NOT destroy the widget. getCDKSelectionBox returns true if the widget will be drawn with a box around it. getCDKSelectionChoice returns the selection choice at the given index. getCDKSelectionChoices returns an array of the current selection choices for the widget. getCDKSelectionCurrent returns the current selection index. getCDKSelectionHighlight returns the attribute of the highlight bar. getCDKSelectionItems copies the selection-list items into the caller's array and re- turns the number of items in the list. getCDKSelectionMode returns the selection mode at the given index. getCDKSelectionModes returns an array of the current modes for the widget. getCDKSelectionTitle returns the first line of the title of the selection widget. The caller must free the returned value. injectCDKSelection injects a single character into the widget. o The parameter selection is a pointer to a non-NULL selection widget. o The parameter character is the character to inject into the widget. The return value and side-effect (setting the widget data exit- Type) depend upon the injected character: RETURN or TAB the function returns 1. The widget data exitType is set to vNORMAL. ESCAPE the function returns -1. vESCAPE_HIT. The widget data exitType is set to vESCAPE_HIT. Otherwise unless modified by preprocessing, postprocessing or key bindings, the function returns -1. The widget data exit- Type is set to vEARLY_EXIT. moveCDKSelection moves the given widget to the given position. o The parameters xpos and ypos are the new position of the wid- get. o The parameter xpos may be an integer or one of the pre-defined values TOP, BOTTOM, and CENTER. o The parameter ypos may be an integer or one of the pre-defined values LEFT, RIGHT, and CENTER. o 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). o The final parameter refresh is a boolean value which states whether the widget will get refreshed after the move. newCDKSelection creates a selection widget and returns a pointer to it. Parame- ters: 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. spos is where the scroll bar is to be placed. It may be one of three values: LEFT puts the scroll bar on the left of the scrolling list. RIGHT puts the scroll bar on the right side of the list, and NONE does not add a scroll bar. height and width control the height and width of the widget. If you provide a value of zero for either of the height or the width, the wid- get will be created with the full width and height of the screen. If you provide a negative value, the widget will be created the full height or width minus the value provided. title is the string which to display at the top of the widget. The title can be more than one line; just provide a carriage re- turn character at the line break. selectionList is the list of items to display in the selection list selectionListLength is the number of elements in the given list. choiceList is the list of choices that will be selected when the user presses the space bar. choiceListLength is the length of this list. highlight specifies the display attribute of the currently selected item. 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 re- turned. positionCDKSelection allows the user to move the widget around the screen via the cur- sor/keypad keys. See cdk_position (3) for key bindings. setCDKSelection lets the programmer modify certain elements of an existing selec- tion widget. The parameter names correspond to the same parameter names listed in the newCDKSelection function. setCDKSelectionBackgroundAttrib sets the background attribute of the widget. The parameter attri- bute is a curses attribute, e.g., A_BOLD. setCDKSelectionBackgroundColor sets the background color of the widget. The parameter color is in the format of the Cdk format strings. See cdk_display (3). setCDKSelectionBox sets whether the widget will be drawn with a box around it. setCDKSelectionBoxAttribute sets the attribute of the box. setCDKSelectionChoice sets the selection choice value at the given index. setCDKSelectionChoices sets the selection choice values of the widget. setCDKSelectionCurrent sets the current selection index. setCDKSelectionHighlight sets the attribute of the highlight bar. setCDKSelectionHorizontalChar sets the horizontal drawing character for the box to the given character. setCDKSelectionItems sets the selection list items. setCDKSelectionLLChar sets the lower left hand corner of the widget's box to the given character. setCDKSelectionLRChar sets the lower right hand corner of the widget's box to the given character. setCDKSelectionMode sets the selection mode at the given index. setCDKSelectionModes sets the selection mode of the elements of the widget. There are two acceptable values for the modes: 0 which allows the user to change the selection value at the given index; and 1 which sets the element to a read-only state. setCDKSelectionPostProcess allows the user to have the widget call a function after the key has been applied to the widget. The parameter function is the callback function. The parameter data points to data passed to the callback function. To learn more about post-processing see cdk_process (3). setCDKSelectionPreProcess allows the user to have the widget call a function after a key is hit and before the key is applied to the widget. The parameter function is the callback function. The parameter data is a pointer to void. To learn more about pre-processing see cdk_process (3). setCDKSelectionTitle set the selection list's title. setCDKSelectionULChar sets the upper left hand corner of the widget's box to the given character. setCDKSelectionURChar sets the upper right hand corner of the widget's box to the given character. setCDKSelectionVerticalChar sets the vertical drawing character for the box to the given char- acter. KEY BINDINGS When the widget is activated there are several default key bindings which help the user enter or manipulate the information quickly: +---------------------------------------------------------+ |Key Action | +---------------------------------------------------------+ |Left Arrow Shift the whole list left one column. | |Right Arrow Shift the whole list right one column. | |Up Arrow Select the previous item in the list. | |Down Arrow Select the next item in the list. | +---------------------------------------------------------+ |Prev Page | |Ctrl-B Scroll one page backward. | +---------------------------------------------------------+ |Next Page | |Ctrl-F Scroll one page forward. | +---------------------------------------------------------+ |1 | |< | |g | |Home Move to the first element in the list. | +---------------------------------------------------------+ |> | |G | |End Move to the last element in the list. | +---------------------------------------------------------+ |$ Shift the whole list to the far right. | || Shift the whole list to the far left. | +---------------------------------------------------------+ |Space Cycles to the next choice on the cur- | | rent item. | |Return Exit the widget and return 1. Also | | set the widget data exitType to vNOR- | | MAL. | |Tab Exit the widget and return 1. Also | | set the widget data exitType to vNOR- | | MAL. | |Escape Exit the widget and return -1. Also | | set the widget data exitType to | | vESCAPE_HIT. | |Ctrl-L Refreshes the screen. | +---------------------------------------------------------+ SEE ALSO cdk(3), cdk_binding(3), cdk_display(3), cdk_position(3), cdk_screen(3) cdk_selection(3)
NAME | SYNOPSIS | DESCRIPTION | AVAILABLE FUNCTIONS | KEY BINDINGS | SEE ALSO
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