home *** CD-ROM | disk | FTP | other *** search
- /*
- #### # # # #
- # # # # # The FreeWare C library for
- # # ## ### # # # # ### RISC OS machines
- # # # # # # # # # # # ___________________________________
- # # #### ### ## # # # #
- # # # # # # # # # # Please refer to the accompanying
- #### ### #### # # ##### # ### documentation for conditions of use
- ________________________________________________________________________
-
- File: Window.h
- Author: Copyright © 1992, 1993, 1994, 1995 Jason Williams, Cy Booker
- and Sergio Monesi,
- Mike Smith
- Version: 1.14 (10 Nov 1995)
- Purpose: High-level window management functions
- History: 1.10 (Dec 1994) Jason Williams
- 1.11 (05 Mar 1995) - CB - Desk_Window_GetInfo3() now returns
- (Desk_os_error *).
- Added Desk_Window_GainCaret()
- 1.12 (14 Jul 1995) - SM - Added Desk_Window_CreateOrig(),
- Desk_Window_DeleteOrig() and
- Desk_Window_ForceWholeRedraw()
- 1.13 (26 Jul 1995) - SM - Added Desk_Window_MoveWindow()
- 1.14 (10 Nov 1995) - MS - Added Desk_Window_IsOpen
- */
-
-
- #ifndef __Desk_Window_h
- #define __Desk_Window_h
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- #ifndef __Desk_Wimp_h
- #include "Desk.Wimp.h"
- #endif
-
- #ifndef __Desk_WimpSWIs_h
- #include "Desk.WimpSWIs.h"
- #endif
-
- #ifndef __Desk_Pointer_h
- #include "Desk.Pointer.h"
- #endif
-
- #ifndef __Desk_Coord_h
- #include "Desk.Coord.h"
- #endif
-
-
- typedef enum
- {
- Desk_open_WHEREVER, /* As defined in the window template file */
- Desk_open_CENTERED, /* center of screen */
- Desk_open_CENTEREDUNDERPOINTER, /* Center window on pointer position */
- Desk_open_OVERCARET, /* Over the current caret position. NOTE: If no
- caret, window is opened Desk_open_CENTERED */
- Desk_open_UNDERPOINTER, /* Under the current pointer position (so that
- the pointer is then in TL corner of window */
- Desk_open_NEARLAST /* Slightly offset from the T.L. pos of the last
- window to be opened with Desk_Window_Show */
- } Desk_window_openpos;
-
-
-
- extern Desk_window_handle Desk_Window_Create(const char *windowname, int maxtitlesize);
- /*
- * This finds the named window template and creates a new copy of the window.
- * It also records the memory allocated for the window so that it can be
- * deallocated when the window is closed (using Desk_Window_Delete)
- *
- * "maxtitlesize" is the maximum length the window's title will be allowed
- * grow to. (See Template.h: Desk_Template_Clone())
- *
- * Returns: The WIMP handle of the newly-created window, or 0 if the template
- * for this window could not be found
- */
-
-
- extern Desk_window_handle Desk_Window_CreateOrig(const char *windowname);
- /*
- * This finds the named window template and creates the window using the
- * data from the template directly (ie. withoud doing a copy).
- * Window created with Desk_Window_CreateOrig should never be deleted but if you
- * want to delete them you must use Desk_Window_DeleteOrig, not Desk_Window_Delete,
- * otherwise the program may crash due to memory deallocation problems.
- *
- * Returns: The WIMP handle of the newly-created window, or 0 if the template
- * for this window could not be found
- */
-
-
- extern void Desk_Window_Show(Desk_window_handle window, Desk_window_openpos openpos);
- /*
-
- * This opens the given window on-screen in the desired position.
- * (It can be used with ANY window, even if not created with Desk_Window_Create)
- */
-
-
- extern Desk_window_handle Desk_Window_CreateAndShow(const char *windowname,
- int maxtitlesize,
- Desk_window_openpos openpos);
- /*
- * Simply calls Desk_Window_Create() and then Desk_Window_Show()
- * (Just to make your programs slightly tidier)
- */
-
-
- #define Desk_Window_Hide(handle) Desk_Wimp_CloseWindow(handle)
- /*
- * Closes the specified window (removes it from screen)
- * THE WINDOW IS NOT DELETED, just "hidden". It is preferable that you use
- * Desk_Window_Create() and Desk_Window_Delete() every time you want a window to
- * appear/disappear, to avoid problems.
- *
- * extern void Desk_Window_Hide(Desk_window_handle window);
- */
-
-
- extern void Desk_Window_Delete(Desk_window_handle window);
- /*
- * This Hides and deletes ANY window.
- * It also removes any Event handlers attached to the window.
- * If the window was created with Desk_Window_Create(), then it also deallocates
- * any memory used by the window.
- */
-
-
- extern void Desk_Window_DeleteOrig(Desk_window_handle window);
- /*
- * This Hides and deletes a window created with Desk_Window_CreateOrig
- * It also removes any Event handlers attached to the window.
- * If the window was created using Desk_Window_Create you *must* use Desk_Window_Delete.
- */
-
-
- extern void Desk_Window_GetInfo(Desk_window_handle window, Desk_window_info *result);
- /*
- * This is simply a frontend to the Desk_Wimp_GetWindowInfo call. However, it
- * returns the Window info block with the icon definitions STRIPPED.
- * Thus, you can use a Desk_window_info structure in your local variables without
- * having to allocate enough memory to cope with any icons that the window
- * happens to have in it. This is the old, slow, nasty RISC OS 2 compatible
- * version of this function. See Desk_Window_GetInfo3 (below) for RISC OS 3
- * specialness
- */
-
-
- extern void Desk_Window_GetInfo3(Desk_window_handle window, Desk_window_info *result);
- /*
- * This is simply a frontend to the Desk_Wimp_GetWindowInfo call. However, it
- * returns the Window info block with the icon definitions STRIPPED.
- * Thus, you can use a Desk_window_info structure in your local variables without
- * having to allocate enough memory to cope with any icons that the window
- * happens to have in it.
- *
- * This version is a smaller, tidier, faster version of the GetInfo call
- * which makes use of a new feature of the SWI, available only under RISC OS 3
- */
-
-
- extern void Desk_Window_ParentName(Desk_window_handle window, char *windowname);
- /*
- * Given any window's handle, this function attempts to find the name
- * (8 characters only, truncated if necessary) of the template from which
- * the window was created (only works if created with Desk_Window_Create)
- * - if the window handle is a negative number, "iconbar" is returned.
- */
-
-
- extern Desk_bool Desk_Window_AutoHelp(Desk_window_handle window, Desk_icon_handle icon);
- /*
- * This adds an event handler for the given window and icon (Desk_event_ANY and
- * Desk_window_ICONBAR may be used). Every HelpRequest message thereafter
- * received for that window will be answered (if possible) with a message
- * from your messages (see Msgs) file.
- * The message tag used will be constructed from the window's template-name
- * and the icon number, as in:
- * mainwind.-1 - Any part of the window not covered by an icon
- * mainwind.3 - Icon 3 of any window created from "mainwind" template
- *
- * In the messages file, you can also use a catch-all message of:
- * mainwind.*
- * which will catch ALL helprequests for the window, so ANY part of the
- * window is guaranteed to give help (if no specific help for an icon is
- * found, then the catch-all help will be used)
- *
- * NOTE that this function (Window.AutoHelp.c) may be recompiled to use
- * Desk_EventMsg_Claim rather than Desk_Event_Claim if you so desire. However,
- * note that currently EventMsg ignores the icon handle.
- * EventMsg is more efficient than having multiple Desk_Event_Claims on
- * incoming message events (especially when you add individual handlers for
- * single windows/icons), but ONLY if you are using several message event
- * handlers. Thus, the default here is to use Desk_Event_Claim so as to not
- * "pull in" the code for EventMsg unless you want to use it.
- */
-
-
- extern Desk_bool Desk_Window_HelpHandler(Desk_event_pollblock *event, void *reference);
- /*
- * This is an event handler (added with Desk_Window_AutoHelp) which provides
- * help on windows and their icons.
- * If you wish to augment the help available for a window, you can call
- * this handler yourself. Checking if it returns Desk_bool_TRUE or Desk_bool_FALSE gives an
- * indicator of whether or not a help reply has been sent.
- * Generally, you will check if the pointer is in an area of the window
- * and supply help for that special area - if not, you drop back to a
- * "fallback" position, and allow the "default" action, by callinf this
- * handler.
- * The other method is to add your own specialised help handler with
- * Desk_Event_Claim, and then add this handler, so that your handler gets first
- * choice when the event comes in.
- */
-
-
- extern void Desk_Window_ModeChange(void);
- /*
- * This function will go through all your templates and all windows that
- * were created with Desk_Window_ calls, and re-find their outline fonts so
- * that they are displayed correctly - this needs to be done after some
- * mode changes. See Handler.h - Desk_Handler_ModeChangeWithFonts() to see
- * how this should/can be used.
- *
- * NOTE: If you create ANY windows without using Desk_Window_Create calls, then
- * this function will not fix their outline font use - but MUCH MORE
- * IMPORTANTLY it will release the font, which may later be replaced
- * by another font (or worse, cease to exists totally), so strange or
- * unhealthy effects might ensue. i.e. ONLY use this if using Desk_Window_Create.
- *
- * Note also that this does NOT attempt to fix fonts in window titles
- * because
- * a) The WIMP currently gets antialiased fonts *very* wrong with toolsprites
- * and/or titlebar selection, so they aren't recommended
- * b) Acorn DO have a new WIMP which uses an Outline font instead of system,
- * so the problem WILL go away with the next OS release.
- * c) This would involve re-creating the window, which would mean a possible
- * change in the window handle, which is something we can't do.
- */
-
-
- extern void Desk_Window_SetTitle(Desk_window_handle window, const char *title);
- /*
- * (equivalent of RISC OS Lib's Desk_win_settitle, only far better)
- * This sets the text in the titlebar of the given window to the given string
- *
- * NOTE that if the title is not indirected, It will be unable to change
- * the text, i.e. nothing will happen!
- *
- * It has several advantages over Desk_win_settitle, however:
- * + It uses legal OS calls to work out the rectange to redrawm so works
- * properly even with strange sized toolsprite sets
- * + It doesn't try to redraw anything if the window is CLOSED!
- * + It handles indirected and text-only title icons, rather than bombing
- * completely if the titlebar is not indirected.
- * + It actually terminates the string if it was too long to fit!!!
- *
- * (And people wonder why I think ROLib is a load of excrement!)
- *
- * Unfortunately it is not possible to only invalidate the VISIBLE area
- * of the window, so this may still create the occasional flicker of any
- * windows over the top of your titlebar... this can't be helped.
- */
-
-
- extern void Desk_Window_BringToFront(Desk_window_handle window);
- /*
- * Pulls the given window to the front of the window stack
- */
-
-
- #define Desk_Window_ConstrainMouse(WND) (Desk_Pointer_RestrictToWindow(WND))
- /*
- * Constrains the mouse pointer to the window bounds
- * extern Desk_os_error *Desk_Window_ConstrainMouse(Desk_window_handle window);
- */
-
-
- extern void Desk_Window_SetExtent(Desk_window_handle wh, int x0, int y0, int x1, int y1);
- /*
- * Change the size of a window's work area extent.
- * If the window is open on screen, Desk_Wimp_OpenWindow will be automatically
- * called to force the change to be realised on screen
- */
-
-
- extern void Desk_Window_ForceRedraw(Desk_window_handle wh,
- int x0, int y0, int x1, int y1);
- /*
- * Marks a screen area for redraw by the Wimp.
- * (x0, y0) is the bottom left corner.
- * Work Area coordinates, ie the top-left corner is generally 0, 0 with y
- * increasingly negative working down the screen.
- *
- * Essentially just a veneer for Desk_Wimp_ForceRedraw().
- */
-
-
- extern void Desk_Window_GetCoords(Desk_window_handle wh, Desk_convert_block *coords);
- /*
- * The coords 'Desk_convert_block' passed into this function is filled
- * with the relevant info for window 'wh'.
- */
-
-
- extern void Desk_Window_GainCaret(Desk_window_handle window);
- /*
- * this intelligently gives the specified window the input focus
- * if the window is 0 then it loses any input focus
- * if the window already has the input focus in an icon then nothing happens
- * otherwise the first writable, non-deleted, non-shaded icon gains the caret
- *
- * see also: Desk_Wimp_SetCaretPosition(), Desk_Icon_SetCaret()
- */
-
-
- extern void Desk_Window_ForceWholeRedraw(Desk_window_handle window);
- /*
- * Forces the redraw of the window screen area
- */
-
-
- extern Desk_bool Desk_Window_MoveWindow(Desk_event_pollblock *event, void *reference);
- /*
- * This function allows you to move a window by dragging any (or all)
- * of its icons. From the event hadler that deals with mouse clicks
- * you should call this function (passing the parameters you received)
- * for the icon(s) that you want to work like the title bar.
- * Remember to set the icon button type to Desk_iconbtype_CLICK (3).
- *
- * If you want that all the icons work this way, you can just register
- * this function with the event module using:
- * Desk_Event_Claim(Desk_event_CLICK, handle, Desk_event_ANY, Desk_Window_MoveWindow, ref);
- *
- * In this case you should set all the icons and also the window
- * background to button type Desk_iconbtype_CLICK (3) so that you will be
- * able to move the window clicking in any point inside it.
- *
- * Note that this function always returns Desk_bool_TRUE.
- */
-
-
- Desk_bool Desk_Window_IsOpen( Desk_window_handle window);
- /*
- Returns Desk_bool_TRUE is the window is open, ot false if it is closed.
- Calls Desk_Error2_XHandle if an error occurs (eg window doesn't exist), and
- returns Desk_bool_FALSE is the error isn't handled.
- */
-
-
-
- void Desk_Window_ToggleShow( Desk_window_handle window, Desk_window_openpos openpos);
- /*
- Calls Desk_Window_Hide if the window is already open, else calls
- Desk_Window_Show.
- */
-
- #ifdef __cplusplus
- }
- #endif
-
- #endif
-