mirror of https://github.com/GNOME/gimp.git
98 lines
3.9 KiB
C
98 lines
3.9 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* Colour selector module (C) 1999 Austin Donnelly <austin@greenend.org.uk>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifndef __COLOR_SELECTOR_H__
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#define __COLOR_SELECTOR_H__
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/********************************/
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/* color selector registration */
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/* A function of this type should be called by the color selector each
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* time the user modifies the selected color. */
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typedef void (*GimpColorSelector_Callback)(void *data, int r, int g, int b);
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/* A function of this type is called to create a new instance of the
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* color selector. The new selector should set its current color to
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* the RGB triple given (each component is in the range 0 - 255
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* inclusive, with white at 255,255,255 and black at 0,0,0).
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*
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* The selector should call "cb" with argument "data" each time the
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* user modifies the selected color.
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*
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* The selector must return a GtkWidget which implements the color
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* selection UI. The selector can optionally return "selector_data",
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* an opaque pointer which will be passed in to subsequent invokations
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* on the selector. */
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typedef GtkWidget * (*GimpColorSelector_NewFunc)(int r, int g, int b,
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GimpColorSelector_Callback cb,
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void *data,
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/* RETURNS: */
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void **selector_data);
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/* A function of this type is called when the color selector is no
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* longer required. This function should not free widgets that are
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* containted within the UI widget returned by new(), since they are
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* destroyed on behalf of the selector by the caller of this
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* function. */
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typedef void (*GimpColorSelector_FreeFunc)(void *selector_data);
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/* A function of this type is called to change the selector's current
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* color. The required color is specified as in the new() function.
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* If the "set_current" parameter is FALSE, then only the old color
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* should be set - if "set_current" is TRUE, both the old color and
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* the current color should be set to the RGB triple given. This
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* function merely gives a hint to the color selector; the selector
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* can choose to ignore this information. */
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typedef void (*GimpColorSelector_SetColorFunc)(void *selector_data,
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int r, int g, int b,
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int set_current);
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typedef struct {
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GimpColorSelector_NewFunc new;
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GimpColorSelector_FreeFunc free;
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GimpColorSelector_SetColorFunc setcolor;
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} GimpColorSelectorMethods;
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typedef void *GimpColorSelectorID;
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/* Register a color selector. Returns an identifier for the color
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* selector on success, or NULL if the name is already in use. Both
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* the name and method table are internalised, so may be freed after
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* this call. */
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GimpColorSelectorID gimp_color_selector_register (const char *name,
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GimpColorSelectorMethods *methods);
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/* Remove the selector "id" from active service. New instances of the
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* selector will not be created, but existing ones are allowed to
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* continue. If "callback" is non-NULL, it will be called once all
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* instances have finished. The callback could be used to unload
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* dynamiclly loaded code, for example.
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*
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* Returns TRUE on success, FALSE if "id" was not found. */
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gboolean gimp_color_selector_unregister (GimpColorSelectorID id,
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void (*callback)(void *data),
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void *data);
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#endif /* __COLOR_SELECTOR_H__ */
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