msg: Add an option to set a custom dialog icon

The predefined dialog icons work well in many cases, but sometimes
it makes sense to use a more specific icon, so add an option to
specify an icon-name to use instead.

https://bugzilla.gnome.org/show_bug.cgi?id=684329

src/msg.c

@@ -58,12 +58,14 @@ zenity_msg (ZenityData *data, ZenityMsgData *msg_data)
   GtkWidget *dialog;
   GtkWidget *ok_button;
   GObject *text;
+  GObject *image;
 
   switch (msg_data->mode) {
     case ZENITY_MSG_WARNING:
       builder = zenity_util_load_ui_file ("zenity_warning_dialog", NULL);
       dialog = GTK_WIDGET (gtk_builder_get_object (builder, "zenity_warning_dialog"));
       text = gtk_builder_get_object (builder, "zenity_warning_text");
+      image = gtk_builder_get_object (builder, "zenity_warning_image");
       ok_button = GTK_WIDGET (gtk_builder_get_object (builder, "zenity_warning_ok_button"));
       break;
 
@@ -71,6 +73,7 @@ zenity_msg (ZenityData *data, ZenityMsgData *msg_data)
       builder = zenity_util_load_ui_file ("zenity_question_dialog", NULL);
       dialog = GTK_WIDGET (gtk_builder_get_object (builder, "zenity_question_dialog"));
       text = gtk_builder_get_object (builder, "zenity_question_text");
+      image = gtk_builder_get_object (builder, "zenity_question_image");
       ok_button = NULL;
       break;
 
@@ -78,6 +81,7 @@ zenity_msg (ZenityData *data, ZenityMsgData *msg_data)
       builder = zenity_util_load_ui_file ("zenity_error_dialog", NULL);
       dialog = GTK_WIDGET (gtk_builder_get_object (builder, "zenity_error_dialog"));
       text = gtk_builder_get_object (builder, "zenity_error_text");
+      image = gtk_builder_get_object (builder, "zenity_error_image");
       ok_button = GTK_WIDGET (gtk_builder_get_object (builder, "zenity_error_ok_button"));
       break;
 
@@ -85,6 +89,7 @@ zenity_msg (ZenityData *data, ZenityMsgData *msg_data)
       builder = zenity_util_load_ui_file ("zenity_info_dialog", NULL);
       dialog = GTK_WIDGET (gtk_builder_get_object (builder, "zenity_info_dialog"));
       text = gtk_builder_get_object (builder, "zenity_info_text");
+      image = gtk_builder_get_object (builder, "zenity_info_image");
       ok_button = GTK_WIDGET (gtk_builder_get_object (builder, "zenity_info_ok_button"));
       break;
 		
@@ -92,6 +97,7 @@ zenity_msg (ZenityData *data, ZenityMsgData *msg_data)
       builder = NULL;
       dialog = NULL;
       text = NULL;
+      image = NULL;
       ok_button = NULL;
       g_assert_not_reached ();
       break;	
@@ -153,6 +159,9 @@ zenity_msg (ZenityData *data, ZenityMsgData *msg_data)
       gtk_label_set_markup (GTK_LABEL (text), g_strcompress (msg_data->dialog_text));
   }
 
+  if (msg_data->dialog_icon)
+    gtk_image_set_from_icon_name (GTK_IMAGE (image), msg_data->dialog_icon, GTK_ICON_SIZE_DIALOG);
+ 
   if (msg_data->no_wrap)
     gtk_label_set_line_wrap (GTK_LABEL (text), FALSE);
 

src/option.c

@@ -35,6 +35,7 @@ static gchar   *zenity_general_window_icon;
 static int      zenity_general_width;
 static int      zenity_general_height;
 static gchar   *zenity_general_dialog_text;
+static gchar   *zenity_general_dialog_icon;
 static gchar   *zenity_general_separator;
 static gboolean zenity_general_multiple;
 static gboolean zenity_general_editable;
@@ -347,6 +348,15 @@ static GOptionEntry error_options[] = {
     N_("Set the dialog text"),
     N_("TEXT")
   },
+  {
+    "icon-name",
+    '\0',
+    G_OPTION_FLAG_NOALIAS,
+    G_OPTION_ARG_STRING,
+    &zenity_general_dialog_icon,
+    N_("Set the dialog icon"),
+    N_("ICON-NAME")
+  },
   {
     "no-wrap",
     '\0',
@@ -388,6 +398,15 @@ static GOptionEntry info_options[] = {
     N_("Set the dialog text"),
     N_("TEXT")
   },
+  {
+    "icon-name",
+    '\0',
+    G_OPTION_FLAG_NOALIAS,
+    G_OPTION_ARG_STRING,
+    &zenity_general_dialog_icon,
+    N_("Set the dialog icon"),
+    N_("ICON-NAME")
+  },
   {
     "no-wrap",
     '\0',
@@ -731,6 +750,15 @@ static GOptionEntry question_options[] = {
     N_("Set the dialog text"),
     N_("TEXT")
   },
+  {
+    "icon-name",
+    '\0',
+    G_OPTION_FLAG_NOALIAS,
+    G_OPTION_ARG_STRING,
+    &zenity_general_dialog_icon,
+    N_("Set the dialog icon"),
+    N_("ICON-NAME")
+  },
   {
     "no-wrap",
     '\0',
@@ -843,6 +871,15 @@ static GOptionEntry warning_options[] = {
     N_("Set the dialog text"),
     N_("TEXT")
   },
+  {
+    "icon-name",
+    '\0',
+    G_OPTION_FLAG_NOALIAS,
+    G_OPTION_ARG_STRING,
+    &zenity_general_dialog_icon,
+    N_("Set the dialog icon"),
+    N_("ICON-NAME")
+  },
   {
     "no-wrap",
     '\0',
@@ -1627,6 +1664,7 @@ zenity_error_post_callback (GOptionContext *context,
 
   if (results->mode == MODE_ERROR) {
     results->msg_data->dialog_text = zenity_general_dialog_text;
+    results->msg_data->dialog_icon = zenity_general_dialog_icon;
     results->msg_data->mode = ZENITY_MSG_ERROR; 
     results->msg_data->no_wrap = zenity_general_dialog_no_wrap; 
     results->msg_data->no_markup = zenity_general_dialog_no_markup;
@@ -1645,6 +1683,7 @@ zenity_info_post_callback (GOptionContext *context,
 
   if (results->mode == MODE_INFO) {
     results->msg_data->dialog_text = zenity_general_dialog_text;
+    results->msg_data->dialog_icon = zenity_general_dialog_icon;
     results->msg_data->mode = ZENITY_MSG_INFO; 
     results->msg_data->no_wrap = zenity_general_dialog_no_wrap;
     results->msg_data->no_markup = zenity_general_dialog_no_markup;
@@ -1819,6 +1858,7 @@ zenity_question_post_callback (GOptionContext *context,
   zenity_option_set_dialog_mode (zenity_question_active, MODE_QUESTION);
   if (results->mode == MODE_QUESTION) {
     results->msg_data->dialog_text = zenity_general_dialog_text;
+    results->msg_data->dialog_icon = zenity_general_dialog_icon;
     results->msg_data->mode = ZENITY_MSG_QUESTION;
     results->msg_data->no_wrap = zenity_general_dialog_no_wrap;
     results->msg_data->no_markup = zenity_general_dialog_no_markup;
@@ -1863,6 +1903,7 @@ zenity_warning_post_callback (GOptionContext *context,
 
   if (results->mode == MODE_WARNING) {
     results->msg_data->dialog_text = zenity_general_dialog_text;
+    results->msg_data->dialog_icon = zenity_general_dialog_icon;
     results->msg_data->mode = ZENITY_MSG_WARNING;
     results->msg_data->no_wrap = zenity_general_dialog_no_wrap;
     results->msg_data->no_markup = zenity_general_dialog_no_markup;

src/zenity.h

@@ -61,6 +61,7 @@ typedef enum {
 
 typedef struct {
   gchar   *dialog_text;
+  gchar   *dialog_icon;
   MsgMode  mode;
   gboolean no_wrap;
   gboolean no_markup;

src/zenity.ui

@@ -299,7 +299,7 @@
                 <property name="border_width">5</property>
                 <property name="spacing">12</property>
                 <child>
-                  <object class="GtkImage" id="image3">
+                  <object class="GtkImage" id="zenity_error_image">
                     <property name="visible">True</property>
                     <property name="can_focus">False</property>
                     <property name="yalign">0</property>
@@ -500,7 +500,7 @@
             <property name="border_width">5</property>
             <property name="spacing">12</property>
             <child>
-              <object class="GtkImage" id="image4">
+              <object class="GtkImage" id="zenity_info_image">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="yalign">0</property>
@@ -677,7 +677,7 @@
             <property name="border_width">5</property>
             <property name="spacing">12</property>
             <child>
-              <object class="GtkImage" id="image1">
+              <object class="GtkImage" id="zenity_question_image">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="xalign">0</property>
@@ -1101,7 +1101,7 @@
             <property name="border_width">5</property>
             <property name="spacing">12</property>
             <child>
-              <object class="GtkImage" id="image2">
+              <object class="GtkImage" id="zenity_warning_image">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
                 <property name="xalign">0</property>