implement zoom in and out

README.md

@@ -57,6 +57,8 @@ rotation clockwise|  Ctrl-r
 rotation counter-clockwise | Ctrl-Alt-r
 Original size | Ctrl-0
 Best fit | f
+Zoom in | +
+Zoom out | -
 Open Settings | s
 Copy file name in clipboard | Ctrl-c
 Exit Settings | Esc

src/bin/entice_controls.c

@@ -107,7 +107,8 @@ _cb_image_zoomin(void *win, Evas_Object *obj EINA_UNUSED, const char *emission E
     Entice *entice;
 
     entice = evas_object_data_get(win, "entice");
-    //entice_image_rotate(entice->image, 1);
+    entice_image_zoom_increase(entice->image);
+    entice_image_update(entice->image);
     printf("zoom in \n");
     fflush(stdout);
 }
@@ -118,7 +119,8 @@ _cb_image_zoomout(void *win, Evas_Object *obj EINA_UNUSED, const char *emission
     Entice *entice;
 
     entice = evas_object_data_get(win, "entice");
-    //entice_image_rotate(entice->image, 1);
+    entice_image_zoom_decrease(entice->image);
+    entice_image_update(entice->image);
     printf("zoom out \n");
     fflush(stdout);
 }

src/bin/entice_image.c

@@ -454,6 +454,46 @@ int entice_image_zoom_get(Evas_Object *obj)
     return sd->zoom;
 }
 
+void
+entice_image_zoom_increase(Evas_Object *obj)
+{
+    Img *sd;
+    size_t l;
+
+    sd = evas_object_smart_data_get(obj);
+    EINA_SAFETY_ON_NULL_RETURN(sd);
+
+    l = sizeof(_zoom_levels) / sizeof(int);
+    for (size_t i = 0; i < (l - 1); i++)
+    {
+        if ((_zoom_levels[i] <= sd->zoom) && (sd->zoom < _zoom_levels[i + 1]))
+        {
+            entice_image_zoom_set(obj, _zoom_levels[i + 1]);
+            break;
+        }
+    }
+}
+
+void
+entice_image_zoom_decrease(Evas_Object *obj)
+{
+    Img *sd;
+    size_t l;
+
+    sd = evas_object_smart_data_get(obj);
+    EINA_SAFETY_ON_NULL_RETURN(sd);
+
+    l = sizeof(_zoom_levels) / sizeof(int);
+    for (size_t i = (l - 1); i > 0; i--)
+    {
+        if ((_zoom_levels[i - 1] < sd->zoom) && (sd->zoom <= _zoom_levels[i]))
+        {
+            entice_image_zoom_set(obj, _zoom_levels[i - 1]);
+            break;
+        }
+    }
+}
+
 void
 entice_image_update(Evas_Object *obj)
 {

src/bin/entice_image.h

@@ -50,6 +50,10 @@ void entice_image_zoom_set(Evas_Object *obj, int zoom);
 
 int entice_image_zoom_get(Evas_Object *obj);
 
+void entice_image_zoom_increase(Evas_Object *obj);
+
+void entice_image_zoom_decrease(Evas_Object *obj);
+
 void entice_image_update(Evas_Object *obj);
 
 #endif /* ENTICE_IMAGE_H */

src/bin/entice_key.c

@@ -88,6 +88,16 @@ void entice_key_handle(Evas_Object *win, Evas_Event_Key_Down *ev)
                 entice_image_set(entice->image, prev);
             }
         }
+        else if (!strcmp(ev->key, "plus"))
+        {
+            entice_image_zoom_increase(entice->image);
+            entice_image_update(entice->image);
+        }
+        else if (!strcmp(ev->key, "minus"))
+        {
+            entice_image_zoom_decrease(entice->image);
+            entice_image_update(entice->image);
+        }
         else if (!strcmp(ev->keyname, "f"))
         {
             entice_image_zoom_mode_set(entice->image, ENTICE_ZOOM_MODE_FIT);