add color picker to color dialog and yad-tools

data/yad.1

@@ -346,6 +346,9 @@ Set initial color value.
 .B \-\-gtk-palette
 Show system palette inside color dialog. For GTK+3 builds this option shows palette instead of color editor.
 .TP
+.B \-\-picker
+Add screen color picker button.
+.TP
 .B \-\-alpha
 Add opacity to output color string.
 .TP

src/Makefile.am

@@ -6,6 +6,8 @@ if !STANDALONE
 bin_SCRIPTS = yad-settings
 endif
 
+CPICKER_SOURCES = cpicker.c cpicker.h
+
 yad_SOURCES = 		\
 	about.c			\
 	app.c			\
@@ -29,7 +31,8 @@ yad_SOURCES = 		\
 	util.c			\
 	main.c			\
 	yad.h			\
-	calendar.xpm
+	calendar.xpm	\
+	$(CPICKER_SOURCES)
 
 if TRAY
 yad_SOURCES += notification.c
@@ -49,7 +52,7 @@ yad_LDADD = $(GTK_LIBS) $(HTML_LIBS) $(SPELL_LIBS) $(SOURCEVIEW_LIBS)
 if BUILD_TOOLS
 bin_PROGRAMS += yad-tools
 
-yad_tools_SOURCES = tools.c
+yad_tools_SOURCES = tools.c	$(CPICKER_SOURCES)
 yad_tools_CFLAGS = $(GTK_CFLAGS) $(SPELL_CFLAGS) $(SOURCEVIEW_CFLAGS)
 yad_tools_LDADD = $(GTK_LIBS) $(SPELL_LIBS) $(SOURCEVIEW_LIBS)
 endif

src/color.c

@@ -20,6 +20,7 @@
 #include <errno.h>
 
 #include "yad.h"
+#include "cpicker.h"
 
 static GtkWidget *color;
 
@@ -102,6 +103,12 @@ set_color (gchar *clr)
 }
 
 static void
+picker_clicked (GtkWidget *w, gpointer data)
+{
+  yad_get_screen_color (color);
+}
+
+static void
 palette_changed (GtkTreeSelection * sel, gpointer data)
 {
   GtkTreeModel *model;
@@ -129,6 +136,21 @@ color_create_widget (GtkWidget * dlg)
     set_color (options.color_data.init_color);
   gtk_box_pack_start (GTK_BOX (w), color, FALSE, FALSE, 2);
 
+  if (options.color_data.color_picker)
+    {
+      GtkWidget *b, *i;
+
+      b = gtk_button_new_with_label (_("Pick up screen color"));
+
+      i = gtk_image_new_from_icon_name ("gtk-color-picker", GTK_ICON_SIZE_BUTTON);
+      gtk_button_set_image (GTK_BUTTON (b), i);
+      g_object_set (G_OBJECT (b), "always-show-image", TRUE, NULL);
+
+      g_signal_connect (G_OBJECT (b), "clicked", G_CALLBACK (picker_clicked), NULL);
+
+      gtk_box_pack_start (GTK_BOX (w), b, FALSE, FALSE, 2);
+    }
+
   if (options.color_data.use_palette)
     {
       GtkTreeModel *model;

src/cpicker.c

+
+/*
+ * This file is part of YAD.
+ *
+ * YAD is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * YAD is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with YAD. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright (C) 2020-2022, Victor Ananjevsky <ananasik@gmail.com>
+ */
+
+/* This code getted from deprecated GtkColorSelection widget (gtk+-3.24.33) */
+
+#define GDK_DISABLE_DEPRECATION_WARNINGS
+
+#include "cpicker.h"
+
+#define BIG_STEP 20
+
+typedef struct {
+  GtkWidget *color_widget;
+  GtkWidget *grab_widget;
+  GdkDevice *keyb_device;
+  GdkDevice *pointer_device;
+  gboolean has_grab;
+  guint32 time;
+} GrabData;
+
+static GdkRGBA selected_color;            /* selected color */
+static gboolean pickup_made = FALSE;      /* true when color was picked up */
+static gboolean pickup_done = FALSE;      /* true when pickup was made or canceled */
+
+static gboolean key_press (GtkWidget * invisible, GdkEventKey * event, gpointer data);
+static gboolean mouse_press (GtkWidget * invisible, GdkEventButton * event, gpointer data);
+
+static GdkCursor *
+make_picker_cursor (GdkScreen * screen)
+{
+  GdkDisplay *display;
+  GdkCursor *cursor;
+
+  display = gdk_screen_get_display (screen);
+  cursor = gdk_cursor_new_from_name (display, "color-picker");
+  if (!cursor)
+    cursor = gdk_cursor_new_from_name (display, "cell");
+  if (!cursor)
+    g_printerr ("cpicker: cannot create cursor\n");
+  return cursor;
+}
+
+static void
+grab_color_at_pointer (GdkScreen * screen, GdkDevice * device, gint x_root, gint y_root, gpointer data)
+{
+  GdkPixbuf *pixbuf;
+  guchar *pixels;
+  GdkRGBA color;
+  GdkWindow *root_window = gdk_screen_get_root_window (screen);
+  GrabData *gd = (GrabData *) data;
+
+  pixbuf = gdk_pixbuf_get_from_window (root_window, x_root, y_root, 1, 1);
+  if (!pixbuf)
+    {
+      gint x, y;
+      GdkWindow *window = gdk_device_get_window_at_position (device, &x, &y);
+      if (!window)
+        return;
+      pixbuf = gdk_pixbuf_get_from_window (window, x, y, 1, 1);
+      if (!pixbuf)
+        return;
+    }
+  pixels = gdk_pixbuf_get_pixels (pixbuf);
+  color.red = pixels[0] / 255.;
+  color.green = pixels[1] / 255.;
+  color.blue = pixels[2] / 255.;
+  color.alpha = 1.0;
+  g_object_unref (pixbuf);
+
+  if (gd->color_widget)
+    gtk_color_chooser_set_rgba (GTK_COLOR_CHOOSER (gd->color_widget), &color);
+  else
+    g_print ("#%02X%02X%02X\n", (gint) (color.red * 255), (gint) (color.green * 255), (gint) (color.blue * 255));
+}
+
+static void
+shutdown_eyedropper (gpointer data)
+{
+  GrabData *gd = (GrabData *) data;
+
+  if (gd->has_grab)
+    {
+      gdk_device_ungrab (gd->keyb_device, gd->time);
+      gdk_device_ungrab (gd->pointer_device, gd->time);
+      gtk_device_grab_remove (gd->grab_widget, gd->pointer_device);
+    }
+
+  if (gd->color_widget == NULL)
+    gtk_main_quit ();
+}
+
+static void
+mouse_motion (GtkWidget * invisible, GdkEventMotion * event, gpointer data)
+{
+  grab_color_at_pointer (gdk_event_get_screen ((GdkEvent *) event),
+                         gdk_event_get_device ((GdkEvent *) event), event->x_root, event->y_root, data);
+}
+
+static gboolean
+mouse_release (GtkWidget * invisible, GdkEventButton * event, gpointer data)
+{
+  /* GtkColorSelection *colorsel = data; */
+
+  if (event->button != GDK_BUTTON_PRIMARY)
+    return FALSE;
+
+  grab_color_at_pointer (gdk_event_get_screen ((GdkEvent *) event),
+                         gdk_event_get_device ((GdkEvent *) event), event->x_root, event->y_root, data);
+
+  shutdown_eyedropper (data);
+
+  g_signal_handlers_disconnect_by_func (invisible, mouse_motion, data);
+  g_signal_handlers_disconnect_by_func (invisible, mouse_release, data);
+
+  return TRUE;
+}
+
+/* Helper Functions */
+
+static gboolean
+key_press (GtkWidget * invisible, GdkEventKey * event, gpointer data)
+{
+  GdkScreen *screen = gdk_event_get_screen ((GdkEvent *) event);
+  GdkDevice *device, *pointer_device;
+  guint state = event->state & gtk_accelerator_get_default_mod_mask ();
+  gint x, y, dx, dy;
+
+  device = gdk_event_get_device ((GdkEvent *) event);
+  pointer_device = gdk_device_get_associated_device (device);
+  gdk_device_get_position (pointer_device, NULL, &x, &y);
+
+  dx = dy = 0;
+
+  switch (event->keyval)
+    {
+    case GDK_KEY_space:
+    case GDK_KEY_Return:
+    case GDK_KEY_ISO_Enter:
+    case GDK_KEY_KP_Enter:
+    case GDK_KEY_KP_Space:
+      grab_color_at_pointer (screen, pointer_device, x, y, data);
+      /* fall through */
+
+    case GDK_KEY_Escape:
+      shutdown_eyedropper (data);
+
+      g_signal_handlers_disconnect_by_func (invisible, mouse_press, data);
+      g_signal_handlers_disconnect_by_func (invisible, key_press, data);
+
+      return TRUE;
+
+    case GDK_KEY_Up:
+    case GDK_KEY_KP_Up:
+      dy = state == GDK_MOD1_MASK ? -BIG_STEP : -1;
+      break;
+
+    case GDK_KEY_Down:
+    case GDK_KEY_KP_Down:
+      dy = state == GDK_MOD1_MASK ? BIG_STEP : 1;
+      break;
+
+    case GDK_KEY_Left:
+    case GDK_KEY_KP_Left:
+      dx = state == GDK_MOD1_MASK ? -BIG_STEP : -1;
+      break;
+
+    case GDK_KEY_Right:
+    case GDK_KEY_KP_Right:
+      dx = state == GDK_MOD1_MASK ? BIG_STEP : 1;
+      break;
+
+    default:
+      return FALSE;
+    }
+
+  gdk_device_warp (pointer_device, screen, x + dx, y + dy);
+
+  return TRUE;
+}
+
+static gboolean
+mouse_press (GtkWidget * invisible, GdkEventButton * event, gpointer data)
+{
+  if (event->type == GDK_BUTTON_PRESS && event->button == GDK_BUTTON_PRIMARY)
+    {
+      g_signal_connect (invisible, "motion-notify-event", G_CALLBACK (mouse_motion), data);
+      g_signal_connect (invisible, "button-release-event", G_CALLBACK (mouse_release), data);
+      g_signal_handlers_disconnect_by_func (invisible, mouse_press, data);
+      g_signal_handlers_disconnect_by_func (invisible, key_press, data);
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+void
+yad_get_screen_color (GtkWidget *widget)
+{
+  GrabData *gd;
+  GdkScreen *screen;
+  GdkDevice *device;
+  GdkCursor *picker_cursor;
+  GdkGrabStatus grab_status;
+  GdkWindow *window;
+
+  gd = g_new0 (GrabData, 1);
+  gd->color_widget = widget;
+  gd->time = gtk_get_current_event_time ();
+
+  screen = gdk_screen_get_default ();
+  device = gtk_get_current_event_device ();
+
+  if (device)
+    {
+  if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
+    {
+      gd->keyb_device = device;
+      gd->pointer_device = gdk_device_get_associated_device (device);
+    }
+  else
+    {
+      gd->pointer_device = device;
+      gd->keyb_device = gdk_device_get_associated_device (device);
+    }
+  }
+  else
+    {
+      GdkSeat *seat = gdk_display_get_default_seat (gdk_screen_get_display (screen));
+      gd->keyb_device = gdk_seat_get_keyboard (seat);
+      gd->pointer_device = gdk_seat_get_pointer (seat);
+    }
+
+  gd->grab_widget = gtk_window_new (GTK_WINDOW_POPUP);
+  gtk_window_set_screen (GTK_WINDOW (gd->grab_widget), screen);
+  gtk_window_resize (GTK_WINDOW (gd->grab_widget), 1, 1);
+  gtk_window_move (GTK_WINDOW (gd->grab_widget), -100, -100);
+  gtk_widget_show (gd->grab_widget);
+
+  gtk_widget_add_events (gd->grab_widget, GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK | GDK_POINTER_MOTION_MASK);
+
+  window = gtk_widget_get_window (gd->grab_widget);
+  if (gdk_device_grab (gd->keyb_device, window, GDK_OWNERSHIP_APPLICATION, FALSE,
+                       GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK, NULL, gd->time) != GDK_GRAB_SUCCESS)
+    return;
+
+  picker_cursor = make_picker_cursor (screen);
+  grab_status = gdk_device_grab (gd->pointer_device, window, GDK_OWNERSHIP_APPLICATION, FALSE,
+                                 GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK | GDK_POINTER_MOTION_MASK,
+                                 picker_cursor, gd->time);
+  if (picker_cursor)
+    g_object_unref (picker_cursor);
+
+  if (grab_status != GDK_GRAB_SUCCESS)
+    {
+      gdk_device_ungrab (gd->keyb_device, gd->time);
+      return;
+    }
+
+  gtk_device_grab_add (gd->grab_widget, gd->pointer_device, TRUE);
+
+  gd->has_grab = TRUE;
+
+  g_signal_connect (gd->grab_widget, "button-press-event", G_CALLBACK (mouse_press), gd);
+  g_signal_connect (gd->grab_widget, "key-press-event", G_CALLBACK (key_press), gd);
+}

src/cpicker.h

+#ifndef __CPICKER_H__
+#define __CPICKER_H__
+
+#include <gtk/gtk.h>
+
+void yad_get_screen_color (GtkWidget *widget);
+
+#endif /* __CPICKER_H__ */

src/option.c

@@ -309,6 +309,8 @@ static GOptionEntry color_options[] = {
     N_("Set path to palette file. Default - " RGB_FILE), N_("[FILENAME]") },
   { "expand-palette", 0, 0, G_OPTION_ARG_NONE, &options.color_data.expand_palette,
     N_("Expand user palette"), NULL },
+  { "picker", 0, 0, G_OPTION_ARG_NONE, &options.color_data.color_picker,
+    N_("Show color picker"), NULL },
   { "mode", 0, 0, G_OPTION_ARG_CALLBACK, set_color_mode,
     N_("Set output mode to MODE. Values are hex (default) or rgb"), N_("MODE") },
   { "alpha", 0, 0, G_OPTION_ARG_NONE, &options.color_data.alpha,
@@ -1704,6 +1706,7 @@ yad_options_init (void)
   options.color_data.init_color = NULL;
   options.color_data.gtk_palette = FALSE;
   options.color_data.use_palette = FALSE;
+  options.color_data.color_picker = FALSE;
   options.color_data.expand_palette = FALSE;
   options.color_data.palette = NULL;
   options.color_data.alpha = FALSE;

src/tools.c

@@ -30,6 +30,8 @@
 #include <gtksourceview/gtksource.h>
 #endif
 
+#include "cpicker.h"
+
 typedef enum {
   PANGO_SPEC,
   XFT_SPEC
@@ -42,6 +44,7 @@ static FontType font_type = XFT_SPEC;
 
 static gboolean pfd_mode = FALSE;
 static gboolean icon_mode = FALSE;
+static gboolean color_mode = FALSE;
 static gboolean mime = FALSE;
 static gboolean ver = FALSE;
 #ifdef HAVE_SPELL
@@ -50,6 +53,7 @@ static gboolean langs_mode = FALSE;
 #ifdef HAVE_SOURCEVIEW
 static gboolean themes_mode = FALSE;
 #endif
+gboolean pick_color = FALSE;
 
 static guint icon_size = 24;
 static gchar *icon_theme_name = NULL;
@@ -84,6 +88,12 @@ static GOptionEntry icon_ents[] = {
   { NULL }
 };
 
+static GOptionEntry color_ents[] = {
+  { "color", 'c', G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_NONE, &color_mode, N_("Color manipulation tools"), NULL },
+  { "pick", 0, 0, G_OPTION_ARG_NONE, &pick_color, N_("Pick up screen color"), NULL },
+  { NULL }
+};
+
 static gboolean
 set_font_type (const gchar *name, const gchar *val, gpointer d, GError **err)
 {
@@ -284,7 +294,7 @@ run_icon_mode ()
   if (mime)
     {
       gchar *ctype = g_content_type_from_mime_type (args[0]);
-      output = g_content_type_get_generic_icon_name (ctype);      
+      output = g_content_type_get_generic_icon_name (ctype);
     }
   else
     {
@@ -293,7 +303,7 @@ run_icon_mode ()
         return 1;
       output = (gchar *) gtk_icon_info_get_filename (ii);
     }
-  
+
   if (output)
     g_print ("%s\n", output);
   else
@@ -302,6 +312,19 @@ run_icon_mode ()
   return 0;
 }
 
+static gint
+run_color_mode ()
+{
+  if (pick_color)
+    {
+      gtk_init (NULL, NULL);
+      yad_get_screen_color (NULL);
+      gtk_main ();
+    }
+
+  return 0;
+}
+
 #ifdef HAVE_SPELL
 static gint
 show_langs ()
@@ -313,7 +336,7 @@ show_langs ()
       const GspellLanguage *l = lng->data;
       g_print ("%s\n", gspell_language_get_code (l));
     }
-    
+
   return 0;
 }
 #endif
@@ -336,7 +359,7 @@ show_themes ()
       g_print ("%s\n", gtk_source_style_scheme_get_name (s));
       i++;
     }
-    
+
   return 0;
 }
 #endif
@@ -372,6 +395,11 @@ main (int argc, char *argv[])
   g_option_group_set_translation_domain (grp, GETTEXT_PACKAGE);
   g_option_context_add_group (ctx, grp);
 
+  grp = g_option_group_new ("color", _("Color mode"), _("Show color mode options"), NULL, NULL);
+  g_option_group_add_entries (grp, color_ents);
+  g_option_group_set_translation_domain (grp, GETTEXT_PACKAGE);
+  g_option_context_add_group (ctx, grp);
+
   if (!g_option_context_parse (ctx, &argc, &argv, &err))
     {
       g_printerr (_("option parsing failed: %s\n"), err->message);
@@ -388,6 +416,8 @@ main (int argc, char *argv[])
     ret = run_pfd_mode ();
   else if (icon_mode)
     ret = run_icon_mode ();
+  else if (color_mode)
+    ret = run_color_mode ();
 #ifdef HAVE_SPELL
   else if (langs_mode)
     ret = show_langs ();

src/yad.h

@@ -298,6 +298,7 @@ typedef struct {
   gchar *init_color;
   gboolean gtk_palette;
   gboolean use_palette;
+  gboolean color_picker;
   gboolean expand_palette;
   gchar *palette;
   gboolean alpha;