mirror of
https://gitlab.gnome.org/GNOME/gimp
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002aa905db
1999-09-27 Michael Natterer <mitch@gimp.org> * app/Makefile.am * app/gimphelp.[ch] * app/gimpui.[ch]: new files * app/interface.[ch] * app/preferences_dialog.[ch] The GIMP Help System part 1: Press "F1" in any dialog to pop up the help page for this dialog. Moved the widget constructors from preferences_dialog.[ch] and the query boxes from interface.[ch] to gimpui.[ch]. The dialog constructors take a help_func and a help_data parameter and install the "F1" accelerator which emits the new "help" signal. The "help" signal callback calls help_func(help_data) which finally has to call gimp_help() which in turn invokes the help browser. Still have to find a proper way to (1) prevent "F1" being assigned to some menu item and (2) to catch "F1" while browsing the menu trees in order to pop up the help for the selected item. * app/menus.c: a <Toolbox>/File/Help... menu item. * app/commands.[ch]: a command callback for the "Help..." menu item. * app/gimprc.[ch]: new boolean gimprc variable "use_help". * app/info_dialog.[ch]: pass a help function and data to the info dialog constructor. * app/tools.[ch]: store the tools help page names in the tool info structure. Export a special tools_help_func() which shows the help page for the active tool. * app/[all files calling a dialog constructor]: pass the dialog's help page to the constructor. Most dialogs are now created by gimp_dialog_new() which also sets up the action_area and the WM delete event callback, so I removed the resp. code from these files. Fixed some minor bugs and did some other stuff but didn't change any logic except dialog creation. * plug-ins/helpbrowser/helpbrowser.c: don't try to call a running help browser and don't install any menu path (all done in app/gimphelp.[ch] now).
491 lines
13 KiB
C
491 lines
13 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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* 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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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include "appenv.h"
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#include "drawable.h"
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#include "general.h"
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#include "gdisplay.h"
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#include "gimpui.h"
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#include "interface.h"
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#include "threshold.h"
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#include "libgimp/gimpintl.h"
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#define TEXT_WIDTH 45
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#define HISTOGRAM_WIDTH 256
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#define HISTOGRAM_HEIGHT 150
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/* the threshold structures */
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typedef struct _Threshold Threshold;
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struct _Threshold
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{
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int x, y; /* coords for last mouse click */
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};
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/* the threshold tool options */
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static ToolOptions *threshold_options = NULL;
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/* the threshold tool dialog */
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static ThresholdDialog *threshold_dialog = NULL;
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/* threshold action functions */
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static void threshold_control (Tool *, ToolAction, gpointer);
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static ThresholdDialog * threshold_new_dialog (void);
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static void threshold_preview (ThresholdDialog *);
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static void threshold_ok_callback (GtkWidget *, gpointer);
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static void threshold_cancel_callback (GtkWidget *, gpointer);
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static void threshold_preview_update (GtkWidget *, gpointer);
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static void threshold_low_threshold_text_update (GtkWidget *, gpointer);
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static void threshold_high_threshold_text_update (GtkWidget *, gpointer);
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static void threshold (PixelRegion *, PixelRegion *, void *);
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static void threshold_histogram_range (HistogramWidget *, int, int, void *);
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/* threshold machinery */
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void
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threshold_2 (void *user_data,
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PixelRegion *srcPR,
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PixelRegion *destPR)
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{
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/* this function just re-orders the arguments so we can use
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pixel_regions_process_paralell */
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threshold(srcPR, destPR, user_data);
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}
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static void
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threshold (PixelRegion *srcPR,
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PixelRegion *destPR,
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void *user_data)
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{
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ThresholdDialog *td;
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unsigned char *src, *s;
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unsigned char *dest, *d;
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int has_alpha, alpha;
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int w, h, b;
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int value;
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td = (ThresholdDialog *) user_data;
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h = srcPR->h;
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src = srcPR->data;
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dest = destPR->data;
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has_alpha = (srcPR->bytes == 2 || srcPR->bytes == 4);
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alpha = has_alpha ? srcPR->bytes - 1 : srcPR->bytes;
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while (h--)
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{
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w = srcPR->w;
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s = src;
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d = dest;
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while (w--)
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{
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if (td->color)
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{
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value = MAX (s[RED_PIX], s[GREEN_PIX]);
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value = MAX (value, s[BLUE_PIX]);
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value = (value >= td->low_threshold && value <= td->high_threshold ) ? 255 : 0;
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}
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else
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value = (s[GRAY_PIX] >= td->low_threshold && s[GRAY_PIX] <= td->high_threshold) ? 255 : 0;
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for (b = 0; b < alpha; b++)
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d[b] = value;
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if (has_alpha)
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d[alpha] = s[alpha];
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s += srcPR->bytes;
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d += destPR->bytes;
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}
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src += srcPR->rowstride;
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dest += destPR->rowstride;
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}
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}
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static void
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threshold_histogram_range (HistogramWidget *w,
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int start,
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int end,
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void *user_data)
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{
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ThresholdDialog *td;
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char text[12];
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td = (ThresholdDialog *) user_data;
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td->low_threshold = start;
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td->high_threshold = end;
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sprintf (text, "%d", start);
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gtk_entry_set_text (GTK_ENTRY (td->low_threshold_text), text);
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sprintf (text, "%d", end);
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gtk_entry_set_text (GTK_ENTRY (td->high_threshold_text), text);
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if (td->preview)
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threshold_preview (td);
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}
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/* threshold action functions */
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static void
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threshold_control (Tool *tool,
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ToolAction action,
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gpointer gdisp_ptr)
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{
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switch (action)
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{
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case PAUSE:
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break;
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case RESUME:
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break;
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case HALT:
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if (threshold_dialog)
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threshold_cancel_callback (NULL, (gpointer) threshold_dialog);
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break;
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default:
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break;
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}
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}
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Tool *
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tools_new_threshold ()
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{
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Tool * tool;
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Threshold * private;
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/* The tool options */
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if (! threshold_options)
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{
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threshold_options = tool_options_new (_("Threshold Options"));
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tools_register (THRESHOLD, threshold_options);
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}
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/* The threshold dialog */
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if (! threshold_dialog)
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threshold_dialog = threshold_new_dialog ();
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else
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if (!GTK_WIDGET_VISIBLE (threshold_dialog->shell))
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gtk_widget_show (threshold_dialog->shell);
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tool = tools_new_tool (THRESHOLD);
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private = g_new (Threshold, 1);
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tool->scroll_lock = TRUE; /* Disallow scrolling */
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tool->preserve = FALSE; /* Don't preserve on drawable change */
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tool->private = (void *) private;
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tool->control_func = threshold_control;
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return tool;
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}
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void
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tools_free_threshold (Tool *tool)
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{
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Threshold * thresh;
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thresh = (Threshold *) tool->private;
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/* Close the color select dialog */
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if (threshold_dialog)
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threshold_cancel_callback (NULL, (gpointer) threshold_dialog);
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g_free (thresh);
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}
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void
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threshold_initialize (GDisplay *gdisp)
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{
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if (drawable_indexed (gimage_active_drawable (gdisp->gimage)))
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{
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g_message (_("Threshold does not operate on indexed drawables."));
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return;
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}
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/* The threshold dialog */
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if (!threshold_dialog)
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threshold_dialog = threshold_new_dialog ();
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else
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if (!GTK_WIDGET_VISIBLE (threshold_dialog->shell))
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gtk_widget_show (threshold_dialog->shell);
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threshold_dialog->drawable = gimage_active_drawable (gdisp->gimage);
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threshold_dialog->color = drawable_color (threshold_dialog->drawable);
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threshold_dialog->image_map =
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image_map_create (gdisp, threshold_dialog->drawable);
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gimp_histogram_calculate_drawable (threshold_dialog->hist,
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threshold_dialog->drawable);
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histogram_widget_update (threshold_dialog->histogram,
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threshold_dialog->hist);
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histogram_widget_range (threshold_dialog->histogram,
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threshold_dialog->low_threshold,
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threshold_dialog->high_threshold);
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if (threshold_dialog->preview)
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threshold_preview (threshold_dialog);
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}
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/**********************/
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/* Threshold dialog */
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/**********************/
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static ThresholdDialog *
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threshold_new_dialog ()
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{
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ThresholdDialog *td;
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GtkWidget *vbox;
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GtkWidget *hbox;
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GtkWidget *label;
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GtkWidget *frame;
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GtkWidget *toggle;
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td = g_new (ThresholdDialog, 1);
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td->preview = TRUE;
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td->low_threshold = 127;
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td->high_threshold = 255;
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td->hist = gimp_histogram_new ();
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/* The shell and main vbox */
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td->shell =
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gimp_dialog_new (_("Threshold"), "threshold",
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tools_help_func, NULL,
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GTK_WIN_POS_NONE,
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FALSE, TRUE, FALSE,
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_("OK"), threshold_ok_callback,
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td, NULL, TRUE, FALSE,
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_("Cancel"), threshold_cancel_callback,
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td, NULL, FALSE, TRUE,
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NULL);
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vbox = gtk_vbox_new (FALSE, 2);
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gtk_container_set_border_width (GTK_CONTAINER (vbox), 2);
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gtk_container_add (GTK_CONTAINER (GTK_DIALOG (td->shell)->vbox), vbox);
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/* Horizontal box for threshold text widget */
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hbox = gtk_hbox_new (TRUE, 2);
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gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
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label = gtk_label_new (_("Threshold Range: "));
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gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
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gtk_widget_show (label);
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/* low threshold text */
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td->low_threshold_text = gtk_entry_new ();
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gtk_entry_set_text (GTK_ENTRY (td->low_threshold_text), "127");
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gtk_widget_set_usize (td->low_threshold_text, TEXT_WIDTH, 25);
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gtk_box_pack_start (GTK_BOX (hbox), td->low_threshold_text, FALSE, FALSE, 0);
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gtk_signal_connect (GTK_OBJECT (td->low_threshold_text), "changed",
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(GtkSignalFunc) threshold_low_threshold_text_update,
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td);
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gtk_widget_show (td->low_threshold_text);
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/* high threshold text */
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td->high_threshold_text = gtk_entry_new ();
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gtk_entry_set_text (GTK_ENTRY (td->high_threshold_text), "255");
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gtk_widget_set_usize (td->high_threshold_text, TEXT_WIDTH, 25);
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gtk_box_pack_start (GTK_BOX (hbox), td->high_threshold_text, FALSE, FALSE, 0);
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gtk_signal_connect (GTK_OBJECT (td->high_threshold_text), "changed",
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(GtkSignalFunc) threshold_high_threshold_text_update,
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td);
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gtk_widget_show (td->high_threshold_text);
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gtk_widget_show (hbox);
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/* The threshold histogram */
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hbox = gtk_hbox_new (TRUE, 2);
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gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, FALSE, 0);
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frame = gtk_frame_new (NULL);
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gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
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gtk_box_pack_start (GTK_BOX (hbox), frame, TRUE, FALSE, 0);
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td->histogram = histogram_widget_new (HISTOGRAM_WIDTH, HISTOGRAM_HEIGHT);
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gtk_signal_connect (GTK_OBJECT (td->histogram), "rangechanged",
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(GtkSignalFunc) threshold_histogram_range,
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(void*)td);
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gtk_container_add (GTK_CONTAINER (frame), GTK_WIDGET(td->histogram));
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gtk_widget_show (GTK_WIDGET(td->histogram));
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gtk_widget_show (frame);
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gtk_widget_show (hbox);
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/* Horizontal box for preview */
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hbox = gtk_hbox_new (TRUE, 2);
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gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
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/* The preview toggle */
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toggle = gtk_check_button_new_with_label (_("Preview"));
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), td->preview);
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gtk_box_pack_start (GTK_BOX (hbox), toggle, TRUE, FALSE, 0);
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gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
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(GtkSignalFunc) threshold_preview_update,
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td);
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gtk_widget_show (label);
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gtk_widget_show (toggle);
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gtk_widget_show (hbox);
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gtk_widget_show (vbox);
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gtk_widget_show (td->shell);
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/* This code is so far removed from the histogram creation because the
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function histogram_range requires a non-NULL drawable, and that
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doesn't happen until after the top-level dialog is shown. */
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histogram_widget_range (td->histogram, td->low_threshold, td->high_threshold);
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return td;
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}
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static void
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threshold_preview (ThresholdDialog *td)
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{
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if (!td->image_map)
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g_warning ("threshold_preview(): No image map");
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image_map_apply (td->image_map, threshold, (void *) td);
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}
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static void
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threshold_ok_callback (GtkWidget *widget,
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gpointer client_data)
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{
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ThresholdDialog *td;
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td = (ThresholdDialog *) client_data;
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if (GTK_WIDGET_VISIBLE (td->shell))
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gtk_widget_hide (td->shell);
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active_tool->preserve = TRUE;
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if (!td->preview)
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image_map_apply (td->image_map, threshold, (void *) td);
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if (td->image_map)
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image_map_commit (td->image_map);
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active_tool->preserve = FALSE;
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td->image_map = NULL;
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active_tool->gdisp_ptr = NULL;
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active_tool->drawable = NULL;
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}
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static void
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threshold_cancel_callback (GtkWidget *widget,
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gpointer client_data)
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{
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ThresholdDialog *td;
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td = (ThresholdDialog *) client_data;
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if (GTK_WIDGET_VISIBLE (td->shell))
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gtk_widget_hide (td->shell);
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if (td->image_map)
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{
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active_tool->preserve = TRUE;
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image_map_abort (td->image_map);
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active_tool->preserve = FALSE;
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td->image_map = NULL;
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gdisplays_flush ();
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}
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active_tool->gdisp_ptr = NULL;
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active_tool->drawable = NULL;
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}
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static void
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threshold_preview_update (GtkWidget *w,
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gpointer data)
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{
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ThresholdDialog *td;
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td = (ThresholdDialog *) data;
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if (GTK_TOGGLE_BUTTON (w)->active)
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{
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td->preview = TRUE;
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threshold_preview (td);
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}
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else
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td->preview = FALSE;
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}
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static void
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threshold_low_threshold_text_update (GtkWidget *w,
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gpointer data)
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{
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ThresholdDialog *td;
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char *str;
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int value;
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td = (ThresholdDialog *) data;
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str = gtk_entry_get_text (GTK_ENTRY (w));
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value = BOUNDS (((int) atof (str)), 0, td->high_threshold);
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if (value != td->low_threshold)
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{
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td->low_threshold = value;
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histogram_widget_range (td->histogram,
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td->low_threshold,
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td->high_threshold);
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if (td->preview)
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threshold_preview (td);
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}
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}
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static void
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threshold_high_threshold_text_update (GtkWidget *w,
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gpointer data)
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{
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ThresholdDialog *td;
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char *str;
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int value;
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td = (ThresholdDialog *) data;
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str = gtk_entry_get_text (GTK_ENTRY (w));
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value = BOUNDS (((int) atof (str)), td->low_threshold, 255);
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if (value != td->high_threshold)
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{
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td->high_threshold = value;
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histogram_widget_range (td->histogram,
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td->low_threshold,
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td->high_threshold);
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if (td->preview)
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threshold_preview (td);
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}
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}
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