Allow middle click & up/down mousewheel on the clock

The bulk of this commit originally came from David B. Cortarello's
patch (see here - https://gitlab.com/o9000/tint2/issues/430), with me
adding the up/down mousewheel elements.

Under Openbox the middle-click is normally used to display the Openbox
menu and the mousewheel to switch desktop. So I needed to modify tint.c
in order to prevent openbox intercepting the new actions.

This commit creates the following new configuration settings :-

clock_mclick_command
clock_uwheel_command
clock_dwheel_command

src/clock/clock.c

@@ -39,7 +39,10 @@ char *time2_timezone;
 char *time_tooltip_format;
 char *time_tooltip_timezone;
 char *clock_lclick_command;
+char *clock_mclick_command;
 char *clock_rclick_command;
+char *clock_uwheel_command;
+char *clock_dwheel_command;
 struct timeval time_clock;
 PangoFontDescription *time1_font_desc;
 PangoFontDescription *time2_font_desc;
@@ -61,7 +64,10 @@ void default_clock()
 	time_tooltip_format = NULL;
 	time_tooltip_timezone = NULL;
 	clock_lclick_command = NULL;
+	clock_mclick_command = NULL;
 	clock_rclick_command = NULL;
+	clock_uwheel_command = NULL;
+	clock_dwheel_command = NULL;
 	time1_font_desc = NULL;
 	time2_font_desc = NULL;
 }
@@ -86,8 +92,14 @@ void cleanup_clock()
 	time_tooltip_timezone = NULL;
 	free(clock_lclick_command);
 	clock_lclick_command = NULL;
+	free(clock_mclick_command);
+	clock_mclick_command = NULL;
 	free(clock_rclick_command);
 	clock_rclick_command = NULL;
+	free(clock_uwheel_command);
+	clock_uwheel_command = NULL;
+	free(clock_dwheel_command);
+	clock_dwheel_command = NULL;
 	stop_timeout(clock_timeout);
 	clock_timeout = NULL;
 }
@@ -277,9 +289,18 @@ void clock_action(int button)
 		case 1:
 		command = clock_lclick_command;
 		break;
+		case 2:
+		command = clock_mclick_command;
+		break;
 		case 3:
 		command = clock_rclick_command;
 		break;
+		case 4:
+		command = clock_uwheel_command;
+		break;
+		case 5:
+		command = clock_dwheel_command;
+		break;
 	}
 	tint_exec(command);
 }

src/clock/clock.h

@@ -33,7 +33,10 @@ extern char *time_tooltip_timezone;
 extern PangoFontDescription *time1_font_desc;
 extern PangoFontDescription *time2_font_desc;
 extern char *clock_lclick_command;
+extern char *clock_mclick_command;
 extern char *clock_rclick_command;
+extern char *clock_uwheel_command;
+extern char *clock_dwheel_command;
 extern int clock_enabled;
 
 

src/config.c

@@ -463,10 +463,22 @@ void add_entry (char *key, char *value)
 		if (strlen(value) > 0)
 			clock_lclick_command = strdup(value);
 	}
+	else if (strcmp(key, "clock_mclick_command") == 0) {
+		if (strlen(value) > 0)
+			clock_mclick_command = strdup(value);
+	}
 	else if (strcmp(key, "clock_rclick_command") == 0) {
 		if (strlen(value) > 0)
 			clock_rclick_command = strdup(value);
 	}
+	else if (strcmp(key, "clock_uwheel_command") == 0) {
+		if (strlen(value) > 0)
+			clock_uwheel_command = strdup(value);
+	}
+	else if (strcmp(key, "clock_dwheel_command") == 0) {
+		if (strlen(value) > 0)
+			clock_dwheel_command = strdup(value);
+	}
 
 	/* Taskbar */
 	else if (strcmp (key, "taskbar_mode") == 0) {

src/tint.c

@@ -447,7 +447,11 @@ int tint2_handles_click(Panel* panel, XButtonEvent* e)
 	if (tskbar && e->button == 1 && panel_mode == MULTI_DESKTOP)
 		return 1;
 	if (click_clock(panel, e->x, e->y)) {
-		if ( (e->button == 1 && clock_lclick_command) || (e->button == 3 && clock_rclick_command) )
+		if (	(e->button == 1 && clock_lclick_command) ||
+			(e->button == 2 && clock_mclick_command) ||
+			(e->button == 3 && clock_rclick_command) ||
+			(e->button == 4 && clock_uwheel_command) ||
+			(e->button == 5 && clock_dwheel_command) )
 			return 1;
 		else
 			return 0;