AmigActive 15/AACD15.ISO/AACD/Programming/BGUI/bgui_e/sources/emodules/bgui/bgui_treeview.e

Text File | 1999-08-28 | 12.6 KB | 388 lines

OPT MODULE
OPT EXPORT
OPT PREPROCESS

/*
 * BGUI Tree List View Class
 *
 * = C Copyright 1999 Manuel Lemos.
 * = C Copyright 1996-1999 Nick Christie.
 * All Rights Reserved.
 *
 */

MODULE  'intuition/classes', 'intuition/classusr', 'intuition/imageclass',
        'intuition/gadgetclass', 'intuition/cghooks', 'intuition/screens',
        'graphics/rastport', 'graphics/gfx', 'intuition/intuition',
        'utility/tagitem'

/************************************************************************
***************************  TREEVIEW CLASS  ****************************
*************************************************************************
*
* NAME
*
* Class:        treeviewclass [private]
* SuperClass:   groupclass [BGUI, public]
*
*
* FUNCTION
*
* This is a BGUI gadget class that can display data with a hierarchical
* or tree-like OBJECTure. In general appearance, it looks like a BGUI
* listview, in fact, it currently uses a listview for basic control
* and display purposes.
*
* The name of each member of the tree is displayed appropriately indented,
* with a small box next to it containing a plus sign if the children of
* the member have been expanded, a minus sign if not. By clicking on the
* box, the user can expand or contract the child list.
*
* Like the BGUI listview, the treeview's native datatype for its
* members is a C-style string. However, hooks are provided to allow
* any type of data to be added to the tree.
*
*
* NEW METHODS
*
*
*
*
* CHANGED METHODS
*
*
*
* ATTRIBUTES
*
* TV_??? -- = ULONG             = ISG--
*
*
*
* EXTERNAL REQUIREMENTS
*
* Client must open these libraries: intuition.library V37+,
* utility.library V37+ and bgui.library V40+ and provide their
* base pointers.
*
*
*************************************************************************/

/************************************************************************
*************************  PUBLIC DEFINITIONS  **************************
************************************************************************/

/*
 * Tags for class attributes
 */

CONST TAG_TVA_BASE        = TAG_USER + $12340000

CONST TVA_ResourceHook    = TAG_TVA_BASE+1    /* = I---- */
CONST TVA_DisplayHook     = TAG_TVA_BASE+2    /* = I---- */
CONST TVA_CompareHook     = TAG_TVA_BASE+3    /* = I---- */
CONST TVA_ExpandHook      = TAG_TVA_BASE+4    /* = I---- */
CONST TVA_ImageStyle      = TAG_TVA_BASE+5    /* = I---- */
CONST TVA_LineStyle       = TAG_TVA_BASE+6    /* = I---- */
CONST TVA_ExpandedImage   = TAG_TVA_BASE+7    /* = I---- */
CONST TVA_ContractedImage = TAG_TVA_BASE+8    /* = I---- */
CONST TVA_LeftAlignImage  = TAG_TVA_BASE+9    /* = I---- */
CONST TVA_NoLeafImage     = TAG_TVA_BASE+10   /* = I---- */
CONST TVA_CopyEntries     = TAG_TVA_BASE+11   /* = I---- */
CONST TVA_Entry           = TAG_TVA_BASE+20   /* = ---N- */
CONST TVA_Parent          = TAG_TVA_BASE+21   /* = ---N- */
CONST TVA_Moved           = TAG_TVA_BASE+22   /* = ---N- */
CONST TVA_NumEntries      = TAG_TVA_BASE+30   /* = --G-- */
CONST TVA_LastClicked     = TAG_TVA_BASE+31   /* = --G-- */
CONST TVA_ViewBounds      = TAG_TVA_BASE+32   /* = --G-- */
CONST TVA_Indentation     = TAG_TVA_BASE+40   /* = ISG-- */
CONST TVA_Top             = TAG_TVA_BASE+41   /* = -SG-- */

/*
 * Tags for class methods
 */

CONST TAG_TVM_BASE        = TAG_TVA_BASE+512

CONST TVM_INSERT          = TAG_TVM_BASE+1
CONST TVM_REMOVE          = TAG_TVM_BASE+2
CONST TVM_REPLACE         = TAG_TVM_BASE+3
CONST TVM_MOVE            = TAG_TVM_BASE+4
CONST TVM_GETENTRY        = TAG_TVM_BASE+5
CONST TVM_SELECT          = TAG_TVM_BASE+6
CONST TVM_VISIBLE         = TAG_TVM_BASE+7
CONST TVM_EXPAND          = TAG_TVM_BASE+8
CONST TVM_CLEAR           = TAG_TVM_BASE+9
CONST TVM_LOCK            = TAG_TVM_BASE+10
CONST TVM_UNLOCK          = TAG_TVM_BASE+11
CONST TVM_SORT            = TAG_TVM_BASE+12
CONST TVM_REDRAW          = TAG_TVM_BASE+13
CONST TVM_REFRESH         = TAG_TVM_BASE+14
CONST TVM_REBUILD         = TAG_TVM_BASE+15       /* debug only! */

/*
 * Values for TVA_ImageStyle:
 */

CONST TVIS_BOX            = 0
CONST TVIS_ARROW          = 1

/*
 * Values for TVA_LineStyle:
 */

CONST TVLS_NONE           = 0
CONST TVLS_DOTS           = 1
CONST TVLS_DASH           = 2
CONST TVLS_SOLID          = 3

/*
 * Message OBJECTure for TVM_INSERT, TVM_MOVE:
 */

OBJECT tvInsert
    methodID:LONG               /* TVM_INSERT, TVM_MOVE */
    gInfo:PTR TO gadgetinfo     /* GadgetInfo */
    entry:PTR TO LONG           /* entry to insert OR move */
    relation:PTR TO LONG        /* parent OR sibling entry */
    where:LONG                  /* see below */
    flags:LONG                  /* see below */
ENDOBJECT

/*
 * Message OBJECTure for TVM_REPLACE
 */

OBJECT tvReplace
    methodID:LONG               /* TVM_REPLACE */
    gInfo:PTR TO gadgetinfo     /* GadgetInfo */
    newEntry:PTR TO LONG        /* entry to replace with */
    oldEntry:PTR TO LONG        /* entry to replace */
    where:LONG                  /* see below */
    flags:LONG                  /* see below */
ENDOBJECT

/*
 * Message OBJECTure for TVM_GETENTRY:
 */

OBJECT tvGet
    methodID:LONG               /* TVM_GET */
    entry:PTR TO LONG           /* parent OR sibling, etc */
    which:LONG                  /* see below */
    flags:LONG                  /* see below */
ENDOBJECT

/*
 * Message OBJECTure for TVM_REMOVE, TVM_SELECT,
 * TVM_VISIBLE, TVM_EXPAND:
 */

OBJECT tvEntry
    methodID:LONG               /* TVM_REMOVE, etc */
    gInfo:PTR TO gadgetinfo     /* GadgetInfo */
    entry:PTR TO LONG           /* entry, parent OR sibling, etc */
    which:LONG                  /* see below */
    flags:LONG                  /* see below */
ENDOBJECT

/*
 * Message OBJECTure for TVM_LOCK consists of only the MethodID.
 */

/*
 * Message OBJECTure for TVM_SORT, TVM_REDRAW, TVM_REFRESH,
 * TVM_CLEAR and TVM_UNLOCK:
 */

OBJECT tvCommand
    methodID:LONG               /* method ID value */
    gInfo:PTR TO gadgetinfo     /* GadgetInfo */
ENDOBJECT

/*
 * Special values for any pointer to an existing entry:
 */

CONST TV_ROOT         = 0     /* dummy root entry */
CONST TV_SELECTED     = 1     /* first selected entry */

/*
 * For internal use only
 */

CONST TVWC_ENTRY          = 0
CONST TVWC_PARENT         = $10000
CONST TVWC_CHILD          = $20000
CONST TVWC_SIB            = $30000
CONST TVWC_TREE           = $40000
CONST TVWC_MASK           = $70000

CONST TVWS_FIRST          = 1
CONST TVWS_LAST           = 2
CONST TVWS_NEXT           = 3
CONST TVWS_PREV           = 4
CONST TVWS_PGUP           = 5
CONST TVWS_PGDN           = 6
CONST TVWS_SORT           = 7
CONST TVWS_ALL            = 8
CONST TVWS_TREE           = 9
CONST TVWS_MASK           = 15

/*
 * Values for tv?_Which and tv?_Where:
 *
 * Key: I = insert, R = remove, P = replace, M = move, G = get,
 *      S = select, V = visible, E = expand
 */

CONST TVW_ENTRY           = TVWC_ENTRY            /* specified entry only = R,P,G,S,V,E */
CONST TVW_PARENT          = TVWC_PARENT           /* parent of entry = R,P,G,S,V,E */
CONST TVW_CHILD_FIRST     = TVWC_CHILD OR TVWS_FIRST /* first child of entry = I,R,P,M,G,S,V,E */
CONST TVW_CHILD_LAST      = TVWC_CHILD OR TVWS_LAST  /* last child of entry = I,R,P,M,G,S,V,E */
CONST TVW_CHILD_SORTED    = TVWC_CHILD OR TVWS_SORT  /* child of entry, sorted = I,P,M */
CONST TVW_CHILD_ALL       = TVWC_CHILD OR TVWS_ALL   /* all children of entry = R,P,S,E */
CONST TVW_CHILD_TREE      = TVWC_CHILD OR TVWS_TREE  /* all children, recursively = S,E */
CONST TVW_SIBLING_FIRST   = TVWC_SIB OR TVWS_FIRST   /* first sibling of entry = I,R,P,M,G,S,V,E */
CONST TVW_SIBLING_LAST    = TVWC_SIB OR TVWS_LAST    /* last sibling of entry = I,R,P,M,G,S,V,E */
CONST TVW_SIBLING_NEXT    = TVWC_SIB OR TVWS_NEXT    /* next sibling of entry = I,R,P,M,G,S,V,E */
CONST TVW_SIBLING_PREV    = TVWC_SIB OR TVWS_PREV    /* prev. sibling of entry = I,R,P,M,G,S,V,E */
CONST TVW_SIBLING_SORTED  = TVWC_SIB OR TVWS_SORT    /* sibling of entry, sorted = I,P,M */
CONST TVW_SIBLING_ALL     = TVWC_SIB OR TVWS_ALL     /* entry AND all siblings = R,P,S,E */
CONST TVW_SIBLING_TREE    = TVWC_SIB OR TVWS_TREE    /* entry, siblings AND all children recursively = S,E */
CONST TVW_TREE_FIRST      = TVWC_TREE OR TVWS_FIRST  /* first in tree, entry ignored = R,G,S,V,E */
CONST TVW_TREE_LAST       = TVWC_TREE OR TVWS_LAST   /* last in tree, entry ignored = R,G,S,V,E */
CONST TVW_TREE_NEXT       = TVWC_TREE OR TVWS_NEXT   /* next in tree from entry = R,G,S,V,E */
CONST TVW_TREE_PREV       = TVWC_TREE OR TVWS_PREV   /* prev. in tree from entry = R,G,S,V,E */
CONST TVW_TREE_PAGE_UP    = TVWC_TREE OR TVWS_PGDN   /* page up in tree from entry = G,S,V,E */
CONST TVW_TREE_PAGE_DOWN  = TVWC_TREE OR TVWS_PGUP   /* page down in tree from entry = G,S,V,E */

/*
 * Bits for tv?_Flags:
 */

CONST TVF_ALL             = 0          /* dummy flag FOR all entries */
CONST TVF_SELECTED        = 1          /* affect only selected entries = R,P,G,V,E */
CONST TVF_VISIBLE         = 2          /* affect only visible entries = R,P,G,E */

CONST TVF_SELECT          = $100        /* select entry = I,P,M,V,E */
CONST TVF_DESELECT        = $200        /* deselect entry = P,M,S,V,E */
CONST TVF_MULTISELECT     = $400        /* multi-select entry = with TVF_SELECT */
CONST TVF_MAKEVISIBLE     = $800        /* make entry visible = I,P,M,S,E */
CONST TVF_EXPAND          = $1000       /* expand entry = I,P,M,S,V */
CONST TVF_CONTRACT        = $2000       /* contract entry = P,M,S,V,E */
CONST TVF_TOGGLE          = $4000       /* toggle selection/expansion = S,E */

CONST TVF_USER_ACTION     = $40000000    /* private */
CONST TVF_INTERNAL        = $80000000    /* private */

/*
 * The TV_ResourceHook is called as follows:
 *
 * rc = hookFunc=  REG= A0 OBJECT Hook *hook,
 *                REG= A2 Object *tv_object,
 *                REG= A1 OBJECT tvResource *message ;
 *
 * On make, return a pointer to the entry to be added, or NULL.
 * On kill, return 0.
 */

OBJECT tvResource
    command:INT                 /* whether to make OR kill */
    entry:PTR TO LONG           /* entry to be added OR removed */
ENDOBJECT

/*
 * TV_ResourceHook commands in tvr_Command
 */

CONST TVRC_MAKE       = 1               /* Build the entry. */
CONST TVRC_KILL       = 2               /* Kill the entry.  */

/*
 * The TV_DisplayHook is called as follows:
 *
 * rc = hookFunc=  REG= A0 OBJECT Hook *hook,
 *                REG= A2 Object *tv_object,
 *                REG= A1 OBJECT tvRender *message ;
 *
 * If your hook completes all rendering, return 0. If you wish
 * the treeview to render a string, return the string, which
 * may have BGUI-style formatting sequences embedded in it.
 */

OBJECT tvRender
    rPort:PTR TO rastport           /* rastport to render in */
    drawInfo:PTR TO drawinfo        /* all you need to render */
    bounds:rectangle                /* bounds to render in */
    entry:PTR TO LONG               /* entry to render */
    state:INT                       /* see below */
    flags:INT                       /* see below */
ENDOBJECT

/*
 * Rendering states in lvr_State
 */

CONST TVRS_NORMAL             = 0       /* normal, enabled state */
CONST TVRS_SELECTED           = 1       /* selected AND enabled */
CONST TVRS_NORMAL_DISABLED    = 2       /* normal disabled state */
CONST TVRS_SELECTED_DISABLED  = 3       /* selected AND disabled */

/*
 * Flag bits in lvr_Flags
 */

CONST TVRF_EXPANDED       = 1     /* entry is expanded */

/*
 * The TV_CompareHook is called as follows:
 *
 * rc = hookFunc=  REG= A0 OBJECT Hook *hook,
 *                REG= A2 Object *tv_object,
 *                REG= A1 OBJECT tvCompare *message ;
 *
 * Your hook must return -1 when entry A should come before entry B, 0 when
 * entry A is equal to entry B and 1 when entry A should come after entry B.
 */

OBJECT tvCompare
    entryA:PTR TO LONG         /* first entry */
    entryB:PTR TO LONG         /* second entry */
ENDOBJECT

/*
 * The TV_ExpandHook is called as follows:
 *
 * rc = hookFunc=  (REG= A0 OBJECT Hook *hook,
 *                REG= A2 Object *tv_object,
 *                REG= A1 OBJECT tvExpand *message) ;
 *
 * Your hook should return non-zero if the expansion or contraction
 * is to go ahead, zero if it should be cancelled.
 *
 * Important: Your hook may *not* invoke any methods on the treeview.
 */

OBJECT tvExpand
    command:INT                 /* whether to expand OR contract */
    entry:PTR TO LONG           /* entry to be expanded/contracted */
    flags:LONG                  /* see below */
ENDOBJECT

/*
 * tvExpand commands in tve_Command
 */

CONST TVEC_EXPAND         = 1           /* entry is to be expanded */
CONST TVEC_CONTRACT       = 2           /* entry is to be contracted */

/*
 * Flag bits in tve_Flags
 */

CONST TVEF_USER_ACTION    = 1     /* hook called due to user action */