ui/gtk: pass horizontal scroll information to the device code

Signed-off-by: Dmitry Petrov <dpetroff@gmail.com>
Message-Id: <20220108153947.171861-4-dpetroff@gmail.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

ui/gtk.c

@@ -968,33 +968,63 @@ static gboolean gd_scroll_event(GtkWidget *widget, GdkEventScroll *scroll,
                                 void *opaque)
 {
     VirtualConsole *vc = opaque;
-    InputButton btn;
+    InputButton btn_vertical;
+    InputButton btn_horizontal;
+    bool has_vertical = false;
+    bool has_horizontal = false;
 
     if (scroll->direction == GDK_SCROLL_UP) {
-        btn = INPUT_BUTTON_WHEEL_UP;
+        btn_vertical = INPUT_BUTTON_WHEEL_UP;
+        has_vertical = true;
     } else if (scroll->direction == GDK_SCROLL_DOWN) {
-        btn = INPUT_BUTTON_WHEEL_DOWN;
+        btn_vertical = INPUT_BUTTON_WHEEL_DOWN;
+        has_vertical = true;
+    } else if (scroll->direction == GDK_SCROLL_LEFT) {
+        btn_horizontal = INPUT_BUTTON_WHEEL_LEFT;
+        has_horizontal = true;
+    } else if (scroll->direction == GDK_SCROLL_RIGHT) {
+        btn_horizontal = INPUT_BUTTON_WHEEL_RIGHT;
+        has_horizontal = true;
     } else if (scroll->direction == GDK_SCROLL_SMOOTH) {
         gdouble delta_x, delta_y;
         if (!gdk_event_get_scroll_deltas((GdkEvent *)scroll,
                                          &delta_x, &delta_y)) {
             return TRUE;
         }
-        if (delta_y == 0) {
-            return TRUE;
-        } else if (delta_y > 0) {
-            btn = INPUT_BUTTON_WHEEL_DOWN;
+
+        if (delta_y > 0) {
+            btn_vertical = INPUT_BUTTON_WHEEL_DOWN;
+            has_vertical = true;
+        } else if (delta_y < 0) {
+            btn_vertical = INPUT_BUTTON_WHEEL_UP;
+            has_vertical = true;
+        } else if (delta_x > 0) {
+            btn_horizontal = INPUT_BUTTON_WHEEL_RIGHT;
+            has_horizontal = true;
+        } else if (delta_x < 0) {
+            btn_horizontal = INPUT_BUTTON_WHEEL_LEFT;
+            has_horizontal = true;
         } else {
-            btn = INPUT_BUTTON_WHEEL_UP;
+            return TRUE;
         }
     } else {
         return TRUE;
     }
 
-    qemu_input_queue_btn(vc->gfx.dcl.con, btn, true);
-    qemu_input_event_sync();
-    qemu_input_queue_btn(vc->gfx.dcl.con, btn, false);
-    qemu_input_event_sync();
+    if (has_vertical) {
+        qemu_input_queue_btn(vc->gfx.dcl.con, btn_vertical, true);
+        qemu_input_event_sync();
+        qemu_input_queue_btn(vc->gfx.dcl.con, btn_vertical, false);
+        qemu_input_event_sync();
+    }
+
+    if (has_horizontal) {
+        qemu_input_queue_btn(vc->gfx.dcl.con, btn_horizontal, true);
+        qemu_input_event_sync();
+        qemu_input_queue_btn(vc->gfx.dcl.con, btn_horizontal, false);
+        qemu_input_event_sync();
+    }
+
     return TRUE;
 }