[gtk+/wip/baedert/gtkimageview: 59/156] gtkimageview: state
- From: Timm Bäder <baedert src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtk+/wip/baedert/gtkimageview: 59/156] gtkimageview: state
- Date: Fri, 26 Feb 2016 17:21:59 +0000 (UTC)
commit 1d7e704aab24918ec90d3e6f43df444e06353cd9
Author: Timm Bäder <mail baedert org>
Date: Thu Dec 3 18:08:22 2015 +0100
gtkimageview: state
gtk/gtkimageview.c | 330 ++++++++++++++++++++++++----------------------------
1 files changed, 152 insertions(+), 178 deletions(-)
---
diff --git a/gtk/gtkimageview.c b/gtk/gtkimageview.c
index 6c657d6..0db3df6 100644
--- a/gtk/gtkimageview.c
+++ b/gtk/gtkimageview.c
@@ -23,23 +23,33 @@
double _new_x;
double _new_y;
+typedef struct
+{
+ double hvalue;
+ double vvalue;
+ double angle;
+ double scale;
+} State;
+
struct _GtkImageViewPrivate
{
double scale;
double angle;
- gboolean snap_angle;
- gboolean fit_allocation;
- gboolean scale_set;
int scale_factor;
- gboolean rotate_gesture_enabled;
- gboolean zoom_gesture_enabled;
+
+ gboolean fit_allocation : 1;
+ gboolean scale_set : 1;
+ gboolean snap_angle : 1;
+ gboolean rotate_gesture_enabled : 1;
+ gboolean zoom_gesture_enabled : 1;
+ gboolean in_rotate : 1;
+ gboolean in_zoom : 1;
+ gboolean size_valid : 1;
GtkGesture *rotate_gesture;
- gboolean in_rotate;
double gesture_start_angle;
GtkGesture *zoom_gesture;
- gboolean in_zoom;
double gesture_start_scale;
/* Current anchor point, or -1/-1.
@@ -47,7 +57,6 @@ struct _GtkImageViewPrivate
double anchor_x;
double anchor_y;
- gboolean size_valid;
GdkWindow *event_window;
@@ -61,7 +70,6 @@ struct _GtkImageViewPrivate
GdkPixbufAnimation *source_animation;
GdkPixbufAnimationIter *source_animation_iter;
cairo_surface_t *image_surface;
- int surface_height;
int animation_timeout;
/* Transitions */
@@ -81,6 +89,7 @@ enum
PROP_ZOOM_GESTURE_ENABLED,
PROP_SNAP_ANGLE,
PROP_FIT_ALLOCATION,
+
LAST_WIDGET_PROPERTY,
PROP_HADJUSTMENT,
PROP_VADJUSTMENT,
@@ -90,15 +99,7 @@ enum
LAST_PROPERTY
};
-enum
-{
- PREPARE_IMAGE,
-
- LAST_SIGNAL
-};
-
static GParamSpec *widget_props[LAST_WIDGET_PROPERTY] = { NULL, };
-static int widget_signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE_WITH_CODE (GtkImageView, gtk_image_view, GTK_TYPE_WIDGET,
@@ -133,6 +134,18 @@ static inline void gtk_image_view_restrict_adjustment (GtkAdjustment *adjustment
/* }}} */
+static void
+gtk_image_view_get_current_state (GtkImageView *image_view,
+ State *state)
+{
+ GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (image_view);
+
+ state->hvalue = gtk_adjustment_get_value (priv->hadjustment);
+ state->vvalue = gtk_adjustment_get_value (priv->vadjustment);
+ state->scale = priv->scale;
+ state->angle = priv->angle;
+}
+
static void
free_load_task_data (LoadTaskData *data)
@@ -170,14 +183,14 @@ bounding_box_for_angle (GtkImageView *image_view,
static int cached_height;
static double cached_scale;
- if (priv->size_valid)
- {
- *width = cached_width;
- *height = cached_height;
- if (scale_out)
- *scale_out = cached_scale;
- return;
- }
+ /*if (priv->size_valid)*/
+ /*{*/
+ /**width = cached_width;*/
+ /**height = cached_height;*/
+ /*if (scale_out)*/
+ /**scale_out = cached_scale;*/
+ /*return;*/
+ /*}*/
if (!priv->image_surface)
@@ -243,6 +256,7 @@ bounding_box_for_angle (GtkImageView *image_view,
}
else
{
+ // XXX These 2 branches do the same?
*width = cached_width = bb_width * scale;
*height = cached_height = bb_height * scale;
}
@@ -256,125 +270,95 @@ static void
gtk_image_view_fix_point_rotate (GtkImageView *image_view,
double angle_before,
int anchor_x,
- int anchor_y)
+ int anchor_y,
+ State *old_state)
{
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (image_view);
double new_angle = priv->angle;
- int center_x;
- int center_y;
+ int bb_width;
+ int bb_height;
+ double center_x;
+ double center_y;
double value_x;
double value_y;
- /*if (!priv->hadjustment || !priv->vadjustment)*/
- /*return;*/
+ g_assert (priv->anchor_x != -1 &&
+ priv->anchor_y != -1);
+
+ double center_x_before;
+ double center_y_before;
- g_assert (priv->anchor_x != -1 && priv->anchor_y != -1);
-/*
+ bounding_box_for_angle (image_view,
+ old_state->angle,
+ &bb_width,
+ &bb_height,
+ NULL);
- /*g_message ("Angle before: %f", angle_before);*/
- /*g_message ("Angle new: %f", priv->angle);*/
+ center_x_before = bb_width / 2.0;
+ center_y_before = bb_height / 2.0;
+
+ center_x_before -= old_state->hvalue;
+ center_y_before -= old_state->vvalue;
bounding_box_for_angle (image_view,
/*angle_before,*/
priv->angle,
- ¢er_x,
- ¢er_y,
+ &bb_width,
+ &bb_height,
NULL);
/*gtk_image_view_compute_bounding_box (image_view,*/
/*¢er_x, ¢er_y,*/
/*NULL);*/
- center_x /= 2;
- center_y /= 2;
+ g_message ("bounding box: %d/%d", bb_width, bb_height);
+ center_x = bb_width / 2.0;
+ center_y = bb_height / 2.0;
- if (priv->hadjustment && priv->vadjustment)
- {
- value_x = gtk_adjustment_get_value (priv->hadjustment);
- value_y = gtk_adjustment_get_value (priv->vadjustment);
- }
- else
- {
- /*g_assert_not_reached ();*/
- value_x = 0;
- value_y = 0;
- }
-
- /* Distance between the gesture bounding box center and
- * the rotation center */
- double delta_x = (anchor_x + value_x) - center_x;
- double delta_y = -(anchor_y + value_y) + center_y;
-
-
- /*double delta_x = anchor_x - center_x;*/
- /*double delta_y = -anchor_y + center_y;*/
-
- g_message ("Delta: %f/%f", delta_x, delta_y);
-
- double distance = sqrtf ((delta_x * delta_x) + (delta_y * delta_y));
-
- double point_angle = atan2 (delta_y, delta_x);
-
- double new_point_angle = RAD_TO_DEG (point_angle) - (new_angle - priv->gesture_start_angle);
-
- /* Relative to center_x/center_y! */
- double new_x = cos (DEG_TO_RAD (new_point_angle)) * distance;
- double new_y = sin (DEG_TO_RAD (new_point_angle)) * distance;
-
-
- _new_x = center_x + new_x;
- _new_y = center_y - new_y;
-
- /*_new_x = center_X + */
+ center_x -= gtk_adjustment_get_value (priv->hadjustment);
+ center_y -= gtk_adjustment_get_value (priv->vadjustment);
+ /*
+ * Facts:
+ *
+ * 1) anchor_x and anchor_y are relative to the widget origin.
+ * They have to be.
+ *
+ * XXX Do they? If the bounding box size changes, the only point
+ * that will stay fixed is the center of it!
+ *
+ * 2) For every time we get in here, we need to get the pixel-position
+ * of the anchor point BEFORE the angle got changed, and its
+ * pixel-position AFTER the angle got changed. Then take the difference
+ * and change the value.
+ *
+ * 3) The position might change and NOT depend on the anchor point at all
+ * -- e.g. if the anchor point is at the center of the image. A change in
+ * bounding box size will then move the image down.
+ *
+ *
+ */
- g_message ("new x: %f, y: %f", _new_x, _new_y);
+ g_message ("Anchor: %f/%f", priv->anchor_x, priv->anchor_y);
+ g_message ("Center before: %f/%f", center_x_before, center_y_before);
+ g_message ("Center: %f/%f", center_x, center_y);
+ /*g_message ("delta_x = (%d + %f) - %f", anchor_y, value_x, center_x);*/
- static gboolean first = TRUE;
- static double hvalue;
- static double vvalue;
- if (first)
- {
- hvalue = gtk_adjustment_get_value (priv->hadjustment);
- vvalue = gtk_adjustment_get_value (priv->vadjustment);
- first = FALSE;
- }
+ // TODO: Fix the calculations for non-center points,
+ // since our anchor point is now 150/150
+ double diff_x = center_x - center_x_before;
+ double diff_y = center_y - center_y_before;
+ g_message ("Diff: %f/%f", diff_x, diff_y);
- double diff_x = anchor_x - _new_x;
- g_message ("Y: %d, %f", anchor_y, _new_y);
- /*double diff_y = y_before - _new_y;*/
- double diff_y = _new_y - anchor_y;
+ gtk_adjustment_set_value (priv->hadjustment,
+ gtk_adjustment_get_value (priv->hadjustment) + diff_x);
- g_message ("Differences: %f/%f", diff_x, diff_y);
-
- if (priv->hadjustment && priv->vadjustment)
- {
- /*double x = gtk_adjustment_get_value (priv->hadjustment);*/
- /*double y = gtk_adjustment_get_value (priv->vadjustment);*/
- double x = hvalue;
- double y = vvalue;
-
- double new_x = x - diff_x;
- double new_y = y - diff_y;
-
- g_message ("hvalue: %f -> %f", gtk_adjustment_get_value (priv->hadjustment),
- new_x);
- g_message ("vvalue: %f -> %f", gtk_adjustment_get_value (priv->vadjustment),
- new_y);
- gtk_adjustment_set_value (priv->hadjustment,
- new_x);
- gtk_adjustment_set_value (priv->vadjustment,
- new_y);
-
-
- /*gtk_image_view_restrict_adjustment (priv->hadjustment);*/
- /*gtk_image_view_restrict_adjustment (priv->vadjustment);*/
- /*gtk_image_view_update_adjustments (image_view);*/
- }
+ gtk_adjustment_set_value (priv->vadjustment,
+ gtk_adjustment_get_value (priv->vadjustment) + diff_y);
g_message ("-------------------------");
}
@@ -473,11 +457,12 @@ gesture_angle_changed_cb (GtkGestureRotate *gesture,
priv->angle = new_angle;
gtk_image_view_update_adjustments (GTK_IMAGE_VIEW (widget));
- if (priv->hadjustment && priv->vadjustment)
- gtk_image_view_fix_point_rotate (GTK_IMAGE_VIEW (widget),
- old_angle,
- priv->anchor_x,
- priv->anchor_y);
+ // XXX
+ /*if (priv->hadjustment && priv->vadjustment)*/
+ /*gtk_image_view_fix_point_rotate (GTK_IMAGE_VIEW (widget),*/
+ /*old_angle,*/
+ /*priv->anchor_x,*/
+ /*priv->anchor_y);*/
if (priv->fit_allocation)
gtk_widget_queue_draw (widget);
@@ -500,21 +485,21 @@ gtk_image_view_compute_bounding_box (GtkImageView *image_view,
double upper_right_degrees;
double upper_left_degrees;
double r;
- int upper_right_x, upper_right_y;
- int upper_left_x, upper_left_y;
+ double upper_right_x, upper_right_y;
+ double upper_left_x, upper_left_y;
double scale;
static int cached_width;
static int cached_height;
static double cached_scale;
- if (priv->size_valid)
- {
- *width = cached_width;
- *height = cached_height;
- if (scale_out)
- *scale_out = cached_scale;
- return;
- }
+ /*if (priv->size_valid)*/
+ /*{*/
+ /**width = cached_width;*/
+ /**height = cached_height;*/
+ /*if (scale_out)*/
+ /**scale_out = cached_scale;*/
+ /*return;*/
+ /*}*/
if (!priv->image_surface)
@@ -531,7 +516,7 @@ gtk_image_view_compute_bounding_box (GtkImageView *image_view,
upper_right_degrees = DEG_TO_RAD (priv->angle) + atan (image_height / image_width);
upper_left_degrees = DEG_TO_RAD (priv->angle) + atan (image_height / -image_width);
- r = sqrtf ((image_width / 2) * (image_width / 2) + (image_height / 2) * (image_height / 2));
+ r = sqrtf ((image_width / 2.0) * (image_width / 2.0) + (image_height / 2.0) * (image_height / 2.0));
upper_right_x = r * cos (upper_right_degrees);
upper_right_y = r * sin (upper_right_degrees);
@@ -539,12 +524,8 @@ gtk_image_view_compute_bounding_box (GtkImageView *image_view,
upper_left_x = r * cos (upper_left_degrees);
upper_left_y = r * sin (upper_left_degrees);
-
- bb_width = MAX (fabs (upper_right_x), fabs (upper_left_x)) * 2;
- bb_height = MAX (fabs (upper_right_y), fabs (upper_left_y)) * 2;
-
- /* XXX The bounding box is 2px too small when fit-allocation is set */
-
+ bb_width = round (MAX (fabs (upper_right_x), fabs (upper_left_x)) * 2.0);
+ bb_height = round (MAX (fabs (upper_right_y), fabs (upper_left_y)) * 2.0);
if (priv->scale_set)
{
@@ -796,7 +777,6 @@ static void
gtk_image_view_init (GtkImageView *image_view)
{
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (image_view);
- GtkStyleContext *sc = gtk_widget_get_style_context (GTK_WIDGET (image_view));
GtkWidget *widget = GTK_WIDGET (image_view);
gtk_widget_set_can_focus (widget, TRUE);
@@ -831,8 +811,6 @@ gtk_image_view_init (GtkImageView *image_view)
gtk_gesture_group (priv->zoom_gesture,
priv->rotate_gesture);
-
- gtk_style_context_add_class (sc, "image-view");
}
@@ -1271,12 +1249,28 @@ gtk_image_view_set_angle (GtkImageView *image_view,
g_assert (angle >= 0.0);
g_assert (angle <= 360.0);
- if (priv->snap_angle)
- gtk_image_view_do_snapping (image_view, angle);
- else
+
+
+
+
+ State old_state;
+ gtk_image_view_get_current_state (image_view, &old_state);
+
+
+
+
+ /*if (priv->snap_angle)*/
+ /*gtk_image_view_do_snapping (image_view, angle);*/
+ /*else*/
priv->angle = angle;
- priv->size_valid = FALSE;
+
+ /*priv->size_valid = FALSE;*/
+
+
+
+ gtk_image_view_update_adjustments (image_view);
+
g_object_notify_by_pspec (G_OBJECT (image_view),
widget_props[PROP_ANGLE]);
@@ -1293,21 +1287,21 @@ gtk_image_view_set_angle (GtkImageView *image_view,
first = FALSE;
}
- priv->anchor_x = 50 + (gtk_widget_get_allocated_width (GTK_WIDGET (image_view))) / 2 - 200;
- priv->anchor_y = 50 + (gtk_widget_get_allocated_height (GTK_WIDGET (image_view))) / 2 - 200;
+ priv->anchor_x = 150 + (gtk_widget_get_allocated_width (GTK_WIDGET (image_view))) / 2 - 200;
+ priv->anchor_y = 150 + (gtk_widget_get_allocated_height (GTK_WIDGET (image_view))) / 2 - 200;
gtk_image_view_fix_point_rotate (image_view,
angle_before,
priv->anchor_x,
- priv->anchor_y);
+ priv->anchor_y,
+ &old_state);
/*}*/
- gtk_image_view_update_adjustments (image_view);
- if (priv->fit_allocation)
- gtk_widget_queue_draw (GTK_WIDGET (image_view));
- else
+ /*if (priv->fit_allocation)*/
+ /*gtk_widget_queue_draw (GTK_WIDGET (image_view));*/
+ /*else*/
gtk_widget_queue_resize (GTK_WIDGET (image_view));
}
@@ -1869,24 +1863,14 @@ gtk_image_view_class_init (GtkImageViewClass *view_class)
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
- /**
- * GtkImageView::prepare-image:
- * @image_view: A #GtkImageView instance
- * @surface: A #cairo_surface_t of type #CAIRO_TYPE_IMAGE_SURFACE.
- */
- widget_signals[PREPARE_IMAGE] = g_signal_new (I_("prepare-image"),
- G_TYPE_FROM_CLASS (object_class),
- G_SIGNAL_RUN_LAST,
- G_STRUCT_OFFSET (GtkImageViewClass, prepare_image),
- NULL, NULL, NULL,
- G_TYPE_NONE, 1, CAIRO_GOBJECT_TYPE_SURFACE);
-
g_object_class_install_properties (object_class, LAST_WIDGET_PROPERTY, widget_props);
g_object_class_override_property (object_class, PROP_HADJUSTMENT, "hadjustment");
g_object_class_override_property (object_class, PROP_VADJUSTMENT, "vadjustment");
g_object_class_override_property (object_class, PROP_HSCROLL_POLICY, "hscroll-policy");
g_object_class_override_property (object_class, PROP_VSCROLL_POLICY, "vscroll-policy");
+
+ gtk_widget_class_set_css_name (widget_class, "imageview");
}
GtkWidget *
@@ -1910,11 +1894,7 @@ gtk_image_view_replace_surface (GtkImageView *image_view,
priv->size_valid = FALSE;
if (surface)
- {
- cairo_surface_reference (priv->image_surface);
-
- g_signal_emit (image_view, widget_signals[PREPARE_IMAGE], 0, priv->image_surface);
- }
+ cairo_surface_reference (priv->image_surface);
}
static void
@@ -1926,7 +1906,6 @@ gtk_image_view_update_surface (GtkImageView *image_view,
int new_width = gdk_pixbuf_get_width (frame);
int new_height = gdk_pixbuf_get_height (frame);
int widget_scale = gtk_widget_get_scale_factor (GTK_WIDGET (image_view));
- gboolean resize = TRUE;
int real_width = (new_width * scale_factor) / widget_scale;
int real_height = (new_height * scale_factor) / widget_scale;
@@ -1940,23 +1919,18 @@ gtk_image_view_update_surface (GtkImageView *image_view,
scale_factor,
window);
g_assert (new_surface != NULL);
- /* replace_surface will emit prepare-image */
gtk_image_view_replace_surface (image_view,
new_surface,
scale_factor);
+ gtk_widget_queue_resize (GTK_WIDGET (image_view));
}
else
{
gdk_cairo_surface_paint_pixbuf (priv->image_surface, frame);
- g_signal_emit (image_view, widget_signals[PREPARE_IMAGE], 0, priv->image_surface);
- resize = FALSE;
+ gtk_widget_queue_draw (GTK_WIDGET (image_view));
}
- g_assert (priv->image_surface != NULL);
- if (resize)
- gtk_widget_queue_resize (GTK_WIDGET (image_view));
- else
- gtk_widget_queue_draw (GTK_WIDGET (image_view));
+ g_assert (priv->image_surface != NULL);
}
static void
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