Use max and min scale values in the view iby taking dpi into account.

2007-01-11  Carlos Garcia Campos  <carlosgc@gnome.org>
	* shell/ev-view-private.h:
	* shell/ev-window.c: (ev_window_screen_changed), (ev_window_init):
	* shell/ev-view.[ch]: (ev_view_class_init), (ev_view_set_zoom),
	(ev_view_set_screen_dpi), (ev_view_can_zoom_in),
	(ev_view_can_zoom_out):
	Use max and min scale values in the view iby taking dpi into account. 

svn path=/trunk/; revision=2214

4 files changed, 38 insertions, 16 deletions

diff --git a/shell/ev-view-private.h b/shell/ev-view-private.h
index ec1fa02..eb7ec72 100644
--- a/shell/ev-view-private.h
+++ b/shell/ev-view-private.h
@@ -104,9 +104,12 @@ struct _EvView {
 	gint end_page;
 	gint current_page;
 
-	int rotation;
-	double scale;
-	int spacing;
+	gint rotation;
+	gdouble scale;
+	gint spacing;
+	gdouble dpi;
+	gdouble max_scale;
+	gdouble min_scale;
 
 	gboolean loading;
 	gboolean continuous;
diff --git a/shell/ev-view.c b/shell/ev-view.c
index 549c256..7353e7d 100644
--- a/shell/ev-view.c
+++ b/shell/ev-view.c
@@ -3252,20 +3252,20 @@ ev_view_class_init (EvViewClass *class)
 					 PROP_ZOOM,
 					 g_param_spec_double ("zoom",
 							      "Zoom factor",
-							       "Zoom factor",
-							       MIN_SCALE,
-							       MAX_SCALE,
-							       1.0,
-							       G_PARAM_READWRITE));
+							      "Zoom factor",
+							      0,
+							      G_MAXDOUBLE,
+							      1.0,
+							      G_PARAM_READWRITE));
 	g_object_class_install_property (object_class,
 					 PROP_ROTATION,
 					 g_param_spec_double ("rotation",
 							      "Rotation",
-							       "Rotation",
-							       0,
-							       360,
-							       0,
-							       G_PARAM_READWRITE));
+							      "Rotation",
+							      0,
+							      360,
+							      0,
+							      G_PARAM_READWRITE));
 	g_object_class_install_property (object_class,
 					 PROP_HAS_SELECTION,
 					 g_param_spec_boolean ("has-selection",
@@ -3493,7 +3493,7 @@ ev_view_set_zoom (EvView   *view,
 	else
 		scale = factor;
 
-	scale = CLAMP (scale, MIN_SCALE, MAX_SCALE);
+	scale = CLAMP (scale, view->min_scale, view->max_scale);
 
 	if (ABS (view->scale - scale) < EPSILON)
 		return;
@@ -3512,6 +3512,18 @@ ev_view_get_zoom (EvView *view)
 	return view->scale;
 }
 
+void
+ev_view_set_screen_dpi (EvView  *view,
+			gdouble  dpi)
+{
+	g_return_if_fail (EV_IS_VIEW (view));
+	g_return_if_fail (dpi > 0);
+
+	view->dpi = dpi;
+	view->min_scale = MIN_SCALE * dpi / 72.0;
+	view->max_scale = MAX_SCALE * dpi / 72.0;
+}
+
 gboolean
 ev_view_get_continuous (EvView *view)
 {
@@ -3704,13 +3716,13 @@ ev_view_get_sizing_mode (EvView *view)
 gboolean
 ev_view_can_zoom_in (EvView *view)
 {
-	return view->scale * ZOOM_IN_FACTOR <= MAX_SCALE;
+	return view->scale * ZOOM_IN_FACTOR <= view->max_scale;
 }
 
 gboolean
 ev_view_can_zoom_out (EvView *view)
 {
-	return view->scale * ZOOM_OUT_FACTOR >= MIN_SCALE;
+	return view->scale * ZOOM_OUT_FACTOR >= view->min_scale;
 }
 
 void
diff --git a/shell/ev-view.h b/shell/ev-view.h
index e6dd395..ba736ca 100644
--- a/shell/ev-view.h
+++ b/shell/ev-view.h
@@ -112,6 +112,8 @@ void		ev_view_set_zoom_for_size (EvView         *view,
 		    			   int             height,
 					   int             vsb_width,
 					   int             hsb_height);
+void            ev_view_set_screen_dpi    (EvView         *view,
+					   gdouble         dpi);
 void		ev_view_rotate_left       (EvView         *view);
 void            ev_view_rotate_right      (EvView         *view);
 void            ev_view_set_rotation      (EvView         *view,
diff --git a/shell/ev-window.c b/shell/ev-window.c
index ffbc1f0..ba8de92 100644
--- a/shell/ev-window.c
+++ b/shell/ev-window.c
@@ -2717,6 +2717,9 @@ ev_window_screen_changed (GtkWidget *widget,
 				  window);
 #endif
 	
+	ev_view_set_screen_dpi (EV_VIEW (window->priv->view),
+				ev_window_get_screen_dpi (window));
+	
 	if (GTK_WIDGET_CLASS (ev_window_parent_class)->screen_changed) {
 		GTK_WIDGET_CLASS (ev_window_parent_class)->screen_changed (widget, old_screen);
 	}
@@ -4663,6 +4666,8 @@ ev_window_init (EvWindow *ev_window)
 			ev_window->priv->scrolled_window);
 
 	ev_window->priv->view = ev_view_new ();
+	ev_view_set_screen_dpi (EV_VIEW (ev_window->priv->view),
+				ev_window_get_screen_dpi (ev_window));
 	ev_window->priv->password_view = ev_password_view_new ();
 	g_signal_connect_swapped (ev_window->priv->password_view,
 				  "unlock",