[gtk+/wip/baedert/gtkimageview: 126/228] GtkImageView: Choose the anchor point in ::begin
- From: Timm Bäder <baedert src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtk+/wip/baedert/gtkimageview: 126/228] GtkImageView: Choose the anchor point in ::begin
- Date: Tue, 5 Jul 2016 18:41:14 +0000 (UTC)
commit eacf1cb421b439db04b9ed85b70ad939392c7666
Author: Timm Bäder <mail baedert org>
Date: Sun Aug 16 22:51:52 2015 +0200
GtkImageView: Choose the anchor point in ::begin
Choosing it in ::update feels weird, so always rotate/zoom to/around the
bounding box center we had in ::begin.
demos/gtk-demo/image_view.c | 9 +-
demos/gtk-demo/image_view.ui | 45 +++-
gtk/gtkimageview.c | 647 +++++++++++++++++++++++++++++++-----------
3 files changed, 527 insertions(+), 174 deletions(-)
---
diff --git a/demos/gtk-demo/image_view.c b/demos/gtk-demo/image_view.c
index 2aca214..3bdcfe4 100644
--- a/demos/gtk-demo/image_view.c
+++ b/demos/gtk-demo/image_view.c
@@ -19,7 +19,7 @@ file_set_cb (GtkFileChooserButton *widget,
GFile *file = g_file_new_for_path (filename);
gtk_image_view_load_from_file_async (GTK_IMAGE_VIEW (image_view),
file,
- 1,
+ 2,
NULL,
generic_cb,
NULL);
@@ -127,11 +127,11 @@ load_pixbuf_button_clicked_cb ()
GdkPixbuf *pixbuf;
/* I really hope you have this. */
- pixbuf = gdk_pixbuf_new_from_file ("/usr/share/backgrounds/gnome/adwaita-day.jpg",
+ pixbuf = gdk_pixbuf_new_from_file ("/home/baedert/imageview.png",
NULL);
g_assert (pixbuf != NULL);
- gtk_image_view_set_pixbuf (GTK_IMAGE_VIEW (image_view), pixbuf, 1);
+ gtk_image_view_set_pixbuf (GTK_IMAGE_VIEW (image_view), pixbuf, 2);
g_object_unref (G_OBJECT (pixbuf));
}
@@ -224,6 +224,7 @@ do_image_view (GtkWidget *do_widget)
/*g_signal_connect (G_OBJECT (image_view), "prepare-image", G_CALLBACK (prepare_image_cb), NULL);*/
+ gtk_window_set_title (GTK_WINDOW (window), "blue: current, green: anchor");
g_object_bind_property (scale_adjustment, "value", image_view, "scale",
G_BINDING_BIDIRECTIONAL);
@@ -238,7 +239,7 @@ do_image_view (GtkWidget *do_widget)
gtk_container_add (GTK_CONTAINER (window), box);
gtk_builder_connect_signals (builder, NULL);
- gtk_window_resize (GTK_WINDOW (window), 800, 600);
+ /*gtk_window_resize (GTK_WINDOW (window), 800, 600);*/
gtk_widget_show_all (window);
return window;
}
diff --git a/demos/gtk-demo/image_view.ui b/demos/gtk-demo/image_view.ui
index c107057..176ce69 100644
--- a/demos/gtk-demo/image_view.ui
+++ b/demos/gtk-demo/image_view.ui
@@ -8,8 +8,10 @@
<object class="GtkAdjustment" id="angle_adjustment">
<property name="upper">360</property>
- <property name="value">0</property>
- <property name="step_increment">0.1</property>
+ <property name="value">3</property>
+ <!--<property name="step_increment">0.1</property>-->
+ <property name="step_increment">1</property>
+ <!--<property name="step_increment">45</property>-->
</object>
@@ -79,7 +81,8 @@
<child>
<object class="GtkButton">
- <property name="visible">true</property>
+ <property name="visible">false</property>
+ <property name="no_show_all">true</property>
<property name="label" translatable="yes">Load HiDPI Pixbuf</property>
<signal name="clicked" handler="load_hidpi_pixbuf_button_clicked_cb" object="image_view"/>
</object>
@@ -93,7 +96,8 @@
<child>
<object class="GtkButton">
- <property name="visible">true</property>
+ <property name="visible">false</property>
+ <property name="no_show_all">true</property>
<property name="label" translatable="yes">Load Surface</property>
<signal name="clicked" handler="load_surface_button_clicked_cb" />
</object>
@@ -107,7 +111,8 @@
<child>
<object class="GtkButton">
- <property name="visible">true</property>
+ <property name="visible">false</property>
+ <property name="no_show_all">true</property>
<property name="label" translatable="yes">Clear</property>
<signal name="clicked" handler="clear_button_clicked_cb" />
</object>
@@ -190,11 +195,11 @@
</child>
<child>
- <object class="GtkScale" id="angle_scale">
+ <object class="GtkSpinButton" id="angle_spin_button">
<property name="visible">true</property>
- <property name="draw_value">true</property>
+ <property name="digits">2</property>
+ <property name="numeric">true</property>
<property name="adjustment">angle_adjustment</property>
- <signal name="format-value" handler="angle_scale_format_value_cb" />
</object>
<packing>
<property name="left_attach">0</property>
@@ -203,6 +208,22 @@
</packing>
</child>
+
+
+ <!--<child>-->
+ <!--<object class="GtkScale" id="angle_scale">-->
+ <!--<property name="visible">true</property>-->
+ <!--<property name="draw_value">true</property>-->
+ <!--<property name="adjustment">angle_adjustment</property>-->
+ <!--<signal name="format-value" handler="angle_scale_format_value_cb" />-->
+ <!--</object>-->
+ <!--<packing>-->
+ <!--<property name="left_attach">0</property>-->
+ <!--<property name="top_attach">11</property>-->
+ <!--<property name="width">2</property>-->
+ <!--</packing>-->
+ <!--</child>-->
+
<child>
<object class="GtkBox">
<property name="visible">true</property>
@@ -249,7 +270,8 @@
<child>
<object class="GtkLabel">
- <property name="visible">true</property>
+ <property name="visible">false</property>
+ <property name="no_show_all">true</property>
<property name="label" translatable="yes">Scale</property>
<property name="margin_top">12</property>
<property name="halign">start</property>
@@ -263,7 +285,8 @@
<child>
<object class="GtkScale" id="scale_scale">
- <property name="visible">true</property>
+ <property name="visible">false</property>
+ <property name="no_show_all">true</property>
<property name="draw_value">true</property>
<property name="adjustment">scale_adjustment</property>
<signal name="format-value" handler="scale_scale_format_value_cb" />
@@ -285,6 +308,8 @@
<property name="visible">true</property>
<property name="hexpand">true</property>
<property name="vexpand">true</property>
+ <property name="width_request">400</property>
+ <property name="height_request">400</property>
</object>
</child>
diff --git a/gtk/gtkimageview.c b/gtk/gtkimageview.c
index 33c59d4..a4fac89 100644
--- a/gtk/gtkimageview.c
+++ b/gtk/gtkimageview.c
@@ -1,7 +1,6 @@
#include "config.h"
#include "gtkimageview.h"
#include "gtktypebuiltins.h"
-#include "gtkmain.h"
#include "gtkintl.h"
#include "gtkprivate.h"
#include "gtkrender.h"
@@ -21,25 +20,44 @@
#define TRANSITION_DURATION (150.0 * 1000.0)
+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.
+ * Should never include the adjustment values */
+ double anchor_x;
+ double anchor_y;
+
GdkWindow *event_window;
@@ -53,7 +71,6 @@ struct _GtkImageViewPrivate
GdkPixbufAnimation *source_animation;
GdkPixbufAnimationIter *source_animation_iter;
cairo_surface_t *image_surface;
- int surface_height;
int animation_timeout;
/* Transitions */
@@ -63,7 +80,6 @@ struct _GtkImageViewPrivate
};
// XXX Actually honour the scroll policies
-// XXX Check scale-factor implementation for correctness
enum
{
@@ -74,6 +90,7 @@ enum
PROP_ZOOM_GESTURE_ENABLED,
PROP_SNAP_ANGLE,
PROP_FIT_ALLOCATION,
+
LAST_WIDGET_PROPERTY,
PROP_HADJUSTMENT,
PROP_VADJUSTMENT,
@@ -83,15 +100,7 @@ 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,
@@ -117,12 +126,39 @@ static void adjustment_value_changed_cb (GtkAdjustment *adjustment,
static void gtk_image_view_update_adjustments (GtkImageView *image_view);
+static void gtk_image_view_compute_bounding_box (GtkImageView *image_view,
+ int *width,
+ int *height,
+ double *scale_out);
+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 gchar *
+state_str (State *s)
+{
+ gchar *str = g_strdup_printf ("(Angle: %f, Scale: %f, hvalue: %f, vvalue: %f)",
+ s->angle, s->scale, s->hvalue, s->vvalue);
+ return str;
+}
+
+
+
static void
free_load_task_data (LoadTaskData *data)
@@ -130,35 +166,222 @@ free_load_task_data (LoadTaskData *data)
g_clear_object (&data->source);
}
+ /*
+ * XXX
+ * The code is *slightly* wrong if fit-allocation is set,
+ * but it doesn't make sense in that case anyway?
+ * XXX
+ */
static void
-gtk_image_view_fix_point_rotate (GtkImageView *image_view,
- double hupper_before,
- double vupper_before,
- int x_before,
- int y_before)
+bounding_box_for_angle (GtkImageView *image_view,
+ double angle,
+ int *width,
+ int *height,
+ double *scale_out)
{
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (image_view);
+ GtkAllocation alloc;
+ double image_width;
+ double image_height;
+ int bb_width = 0;
+ int bb_height = 0;
+ double upper_right_degrees;
+ double upper_left_degrees;
+ double r;
+ double upper_right_x, upper_right_y;
+ double upper_left_x, upper_left_y;
+ double scale;
+ static double cached_width;
+ static double cached_height;
+ static double cached_scale;
- /*
- * XXX
- * We should rotate around the bounding box center of the rotate gesture,
- * but we currently only rotate around the image center!
- */
+ /*if (priv->size_valid)*/
+ /*{*/
+ /**width = cached_width;*/
+ /**height = cached_height;*/
+ /*if (scale_out)*/
+ /**scale_out = cached_scale;*/
+ /*return;*/
+ /*}*/
- double x_diff = gtk_adjustment_get_value (priv->hadjustment) - hupper_before;
- double y_diff = gtk_adjustment_get_value (priv->vadjustment) - vupper_before;
- if (x_diff == 0 && y_diff == 0)
+ if (!priv->image_surface)
{
- g_message ("No difference!");
+ *width = 0;
+ *height = 0;
return;
}
+ gtk_widget_get_allocation (GTK_WIDGET (image_view), &alloc);
+
+ image_width = cairo_image_surface_get_width (priv->image_surface);
+ image_height = cairo_image_surface_get_height (priv->image_surface);
+
+ upper_right_degrees = DEG_TO_RAD (angle) + atan (image_height / image_width);
+ upper_left_degrees = DEG_TO_RAD (angle) + atan (image_height / -image_width);
+
+
+ r = sqrtf ((image_width / 2) * (image_width / 2) + (image_height / 2) * (image_height / 2));
+
+ upper_right_x = r * cos (upper_right_degrees);
+ upper_right_y = r * sin (upper_right_degrees);
+
+ upper_left_x = r * cos (upper_left_degrees);
+ upper_left_y = r * sin (upper_left_degrees);
+
+ 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)
+ {
+ scale = priv->scale;
+ }
+ else
+ {
+ if (priv->fit_allocation)
+ {
+ double scale_x = (double)alloc.width / (double)bb_width;
+ double scale_y = (double)alloc.height / (double)bb_height;
+
+ scale = MIN (MIN (scale_x, scale_y), 1.0);
+ }
+ else
+ {
+ scale = 1.0;
+ }
+ }
+
+ /*cached_scale = scale;*/
+ if (scale_out)
+ *scale_out = scale;
+
+ if (priv->fit_allocation)
+ {
+ priv->scale = scale;
+ g_object_notify_by_pspec (G_OBJECT (image_view),
+ widget_props[PROP_SCALE]);
+
+ *width = cached_width = bb_width * scale;
+ *height = cached_height = bb_height * scale;
+ }
+ else
+ {
+ // XXX These 2 branches do the same?
+ g_message ("bb_width: %d, scale: %f", bb_width, scale);
+ *width = cached_width = bb_width * scale;
+ *height = cached_height = bb_height * scale;
+ }
+
+ /*priv->size_valid = TRUE;*/
+
+}
+
+
+static void
+gtk_image_view_fix_point_rotate (GtkImageView *image_view,
+ double angle_before,
+ int anchor_x,
+ int anchor_y,
+ State *old_state)
+{
+ GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (image_view);
+ double new_angle = priv->angle;
+ int bb_width;
+ int bb_height;
+ double center_x;
+ double center_y;
+ double value_x;
+ double value_y;
+
+ g_assert (priv->anchor_x != -1 &&
+ priv->anchor_y != -1);
+
+ double center_x_before;
+ double center_y_before;
+
+ g_message ("Old State: %s", state_str (old_state));
+
+
+ bounding_box_for_angle (image_view,
+ old_state->angle,
+ &bb_width,
+ &bb_height,
+ NULL);
+
+ 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,
+ &bb_width,
+ &bb_height,
+ NULL);
+
+ /*g_message ("bounding box: %d/%d", bb_width, bb_height);*/
+ center_x = bb_width / 2.0;
+ center_y = bb_height / 2.0;
+
+
+ // XXX Now that anchor_x/anchor_y are relative to the bounding box center,
+ // what are center_x/center_y relative to?
+
+ center_x -= gtk_adjustment_get_value (priv->hadjustment);
+ center_y -= gtk_adjustment_get_value (priv->vadjustment);
+
+ /*double c = center_x;*/
+ /*g_message ("%f, %f, %f, %f", a, b, c, gtk_adjustment_get_value (priv->hadjustment));*/
+
+ /*
+ * 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.
+ *
+ *
+ */
+
+ /* XXX What if the image is rotated by 45deg and the user presses outside of it?
+ * I.e. the anchor point would lie outside of the image? */
+
+ 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);*/
+
+
+ // 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);
+
gtk_adjustment_set_value (priv->hadjustment,
- gtk_adjustment_get_value (priv->hadjustment) + x_diff);
+ gtk_adjustment_get_value (priv->hadjustment) + diff_x);
+
+
gtk_adjustment_set_value (priv->vadjustment,
- gtk_adjustment_get_value (priv->vadjustment) + y_diff);
+ gtk_adjustment_get_value (priv->vadjustment) + diff_y);
+
+ g_message ("-------------------------");
}
static void
@@ -175,13 +398,12 @@ gtk_image_view_fix_point (GtkImageView *image_view,
g_assert (!(priv->hadjustment == NULL && priv->vadjustment == NULL));
+ x_before += gtk_adjustment_get_value (priv->hadjustment);
+ y_before += gtk_adjustment_get_value (priv->vadjustment);
+
x_value = gtk_adjustment_get_value (priv->hadjustment);
y_value = gtk_adjustment_get_value (priv->vadjustment);
- x_before += x_value;
- y_before += y_value;
-
-
x_after = x_before / scale_before * priv->scale;
y_after = y_before / scale_before * priv->scale;
@@ -201,7 +423,10 @@ gesture_rotate_end_cb (GtkGesture *gesture,
priv->gesture_start_angle = 0.0;
priv->in_rotate = FALSE;
- gtk_image_view_set_angle (user_data, priv->angle);
+ /*gtk_image_view_set_angle (user_data, priv->angle);*/
+
+ /*priv->anchor_x = -1;*/
+ /*priv->anchor_y = -1;*/
}
static void
@@ -213,6 +438,9 @@ gesture_rotate_cancel_cb (GtkGesture *gesture,
gtk_image_view_set_angle (user_data, priv->gesture_start_angle);
priv->in_rotate = FALSE;
priv->gesture_start_angle = FALSE;
+
+ /*priv->anchor_x = -1;*/
+ /*priv->anchor_y = -1;*/
}
@@ -224,10 +452,7 @@ gesture_angle_changed_cb (GtkGestureRotate *gesture,
{
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (GTK_IMAGE_VIEW (widget));
double new_angle;
- double hupper_before;
- double vupper_before;
- double bb_x;
- double bb_y;
+ double old_angle;
if (!priv->rotate_gesture_enabled)
{
@@ -241,32 +466,29 @@ gesture_angle_changed_cb (GtkGestureRotate *gesture,
priv->gesture_start_angle = priv->angle;
}
- if (priv->hadjustment && priv->vadjustment)
- {
- hupper_before = gtk_adjustment_get_upper (priv->hadjustment);
- vupper_before = gtk_adjustment_get_upper (priv->vadjustment);
- }
+ new_angle = priv->gesture_start_angle + RAD_TO_DEG (delta);
+ if (new_angle == priv->angle)
+ return;
- new_angle = priv->gesture_start_angle + RAD_TO_DEG (delta);
+ priv->size_valid = FALSE;
/* Don't notify */
+ old_angle = priv->angle;
priv->angle = new_angle;
gtk_image_view_update_adjustments (GTK_IMAGE_VIEW (widget));
+ // 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);
else
gtk_widget_queue_resize (widget);
-
- gtk_gesture_get_bounding_box_center (GTK_GESTURE (gesture), &bb_x, &bb_y);
-
- if (priv->hadjustment && priv->vadjustment)
- gtk_image_view_fix_point_rotate (GTK_IMAGE_VIEW (widget),
- hupper_before,
- vupper_before,
- bb_x,
- bb_y);
}
static void
@@ -277,21 +499,28 @@ gtk_image_view_compute_bounding_box (GtkImageView *image_view,
{
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (image_view);
GtkAllocation alloc;
- int image_width;
- int image_height;
+ double image_width;
+ double image_height;
int bb_width = 0;
int bb_height = 0;
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;
-
- /* XXX
- * Cache the current bounding box and only recompute if scale/rotation changed
- */
+ /*if (priv->size_valid)*/
+ /*{*/
+ /**width = cached_width;*/
+ /**height = cached_height;*/
+ /*if (scale_out)*/
+ /**scale_out = cached_scale;*/
+ /*return;*/
+ /*}*/
if (!priv->image_surface)
@@ -306,9 +535,9 @@ gtk_image_view_compute_bounding_box (GtkImageView *image_view,
image_width = cairo_image_surface_get_width (priv->image_surface);
image_height = cairo_image_surface_get_height (priv->image_surface);
- upper_right_degrees = DEG_TO_RAD (priv->angle) + atan ((double)image_height / (double)image_width);
- upper_left_degrees = DEG_TO_RAD (priv->angle) + atan ((double)image_height / -(double)image_width);
- r = sqrtf ((image_width / 2) * (image_width / 2) + (image_height / 2) * (image_height / 2));
+ 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 / 2.0) * (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);
@@ -316,12 +545,8 @@ 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)
{
@@ -342,25 +567,26 @@ gtk_image_view_compute_bounding_box (GtkImageView *image_view,
}
}
+ cached_scale = scale;
if (scale_out)
*scale_out = scale;
if (priv->fit_allocation)
{
-
- // XXX We probably don't want to do that here since it will be called fairly often.
priv->scale = scale;
g_object_notify_by_pspec (G_OBJECT (image_view),
widget_props[PROP_SCALE]);
- *width = bb_width * scale;
- *height = bb_height * scale;
+ *width = cached_width = bb_width * scale;
+ *height = cached_height = bb_height * scale;
}
else
{
- *width = bb_width * scale;
- *height = bb_height * scale;
+ *width = cached_width = bb_width * scale;
+ *height = cached_height = bb_height * scale;
}
+
+ priv->size_valid = TRUE;
}
@@ -443,7 +669,7 @@ gtk_image_view_update_adjustments (GtkImageView *image_view)
/*
- * This is basicallt the normal _set_scale without the
+ * This is basically the normal _set_scale without the
* _fix_point call at the end, so we can choose the point
* to fix.
*/
@@ -473,6 +699,8 @@ gtk_image_view_set_scale_internal (GtkImageView *image_view,
widget_props[PROP_FIT_ALLOCATION]);
}
+ priv->size_valid = FALSE;
+
gtk_image_view_update_adjustments (image_view);
gtk_widget_queue_resize (GTK_WIDGET (image_view));
@@ -489,6 +717,9 @@ gesture_zoom_end_cb (GtkGesture *gesture,
priv->gesture_start_scale = 0.0;
priv->in_zoom = FALSE;
+
+ priv->anchor_x = -1;
+ priv->anchor_y = -1;
}
static void
@@ -502,6 +733,8 @@ gesture_zoom_cancel_cb (GtkGesture *gesture,
priv->gesture_start_scale = 0.0;
priv->in_zoom = FALSE;
+ priv->anchor_x = -1;
+ priv->anchor_y = -1;
}
@@ -511,16 +744,14 @@ gesture_scale_changed_cb (GtkGestureZoom *gesture,
GtkWidget *widget)
{
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (GTK_IMAGE_VIEW (widget));
- double bb_x;
- double bb_y;
double new_scale;
double old_scale = priv->scale;
- if (!priv->rotate_gesture_enabled)
- {
- gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_DENIED);
+ /*if (!priv->rotate_gesture_enabled)*/
+ /*{*/
+ /*gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_DENIED);*/
return;
- }
+ /*}*/
if (!priv->in_zoom)
{
@@ -528,8 +759,6 @@ gesture_scale_changed_cb (GtkGestureZoom *gesture,
priv->gesture_start_scale = priv->scale;
}
- gtk_gesture_get_bounding_box_center (GTK_GESTURE (gesture), &bb_x, &bb_y);
-
new_scale = priv->gesture_start_scale * delta;
/* Don't emit */
@@ -542,8 +771,28 @@ gesture_scale_changed_cb (GtkGestureZoom *gesture,
if (priv->hadjustment || priv->vadjustment)
gtk_image_view_fix_point (GTK_IMAGE_VIEW (widget),
old_scale,
- bb_x,
- bb_y);
+ priv->anchor_x,
+ priv->anchor_y);
+}
+
+static void
+gesture_begin_cb (GtkGesture *gesture,
+ GdkEventSequence *sequence,
+ gpointer user_data)
+{
+ GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (user_data);
+
+ g_assert (0);
+
+ if (priv->anchor_x == -1 && priv->anchor_y == -1)
+ {
+ gtk_gesture_get_bounding_box_center (gesture,
+ &priv->anchor_x,
+ &priv->anchor_y);
+
+ priv->anchor_x = 50;
+ priv->anchor_y = 50;
+ }
}
@@ -551,35 +800,40 @@ 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 ((GtkWidget *)image_view);
GtkWidget *widget = GTK_WIDGET (image_view);
gtk_widget_set_can_focus (widget, TRUE);
gtk_widget_set_has_window (widget, FALSE);
+ _new_x = -1;
+ _new_y = -1;
+
priv->scale = 1.0;
priv->angle = 0.0;
priv->snap_angle = FALSE;
priv->fit_allocation = FALSE;
priv->scale_set = FALSE;
+ priv->size_valid = FALSE;
+ priv->anchor_x = -1;
+ priv->anchor_y = -1;
priv->rotate_gesture_enabled = TRUE;
priv->zoom_gesture_enabled = TRUE;
priv->rotate_gesture = gtk_gesture_rotate_new (widget);
gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (priv->rotate_gesture),
GTK_PHASE_CAPTURE);
g_signal_connect (priv->rotate_gesture, "angle-changed", (GCallback)gesture_angle_changed_cb, image_view);
+ g_signal_connect (priv->rotate_gesture, "begin", (GCallback)gesture_begin_cb, image_view);
g_signal_connect (priv->rotate_gesture, "end", (GCallback)gesture_rotate_end_cb, image_view);
g_signal_connect (priv->rotate_gesture, "cancel", (GCallback)gesture_rotate_cancel_cb, image_view);
priv->zoom_gesture = gtk_gesture_zoom_new (widget);
g_signal_connect (priv->zoom_gesture, "scale-changed", (GCallback)gesture_scale_changed_cb, image_view);
+ g_signal_connect (priv->zoom_gesture, "begin", (GCallback)gesture_begin_cb, image_view);
g_signal_connect (priv->zoom_gesture, "end", (GCallback)gesture_zoom_end_cb, image_view);
g_signal_connect (priv->zoom_gesture, "cancel", (GCallback)gesture_zoom_cancel_cb, image_view);
gtk_gesture_group (priv->zoom_gesture,
priv->rotate_gesture);
-
- gtk_style_context_add_class (sc, "image-view");
}
@@ -705,6 +959,7 @@ gtk_image_view_do_snapping (GtkImageView *image_view,
priv->angle = new_angle;
}
+
static gboolean
gtk_image_view_draw (GtkWidget *widget, cairo_t *ct)
{
@@ -802,6 +1057,35 @@ gtk_image_view_draw (GtkWidget *widget, cairo_t *ct)
cairo_fill (ct);
cairo_restore (ct);
+
+ /* XXX Debugging, Remove later. */
+ if (priv->anchor_x != -1 && priv->anchor_y != -1)
+ {
+ double x = priv->anchor_x;
+ double y = priv->anchor_y;
+
+ cairo_set_source_rgba (ct, 0, 1, 0, 1);
+ cairo_rectangle (ct, x - 2, y - 2, 4, 4);
+ cairo_fill (ct);
+ }
+
+ if (_new_x != -1 && _new_y != -1)
+ {
+ double x = _new_x;
+ double y = _new_y;
+
+ cairo_set_source_rgba (ct, 0, 0, 1, 1);
+ cairo_rectangle (ct, x - 2, y - 2, 4, 4);
+ cairo_fill (ct);
+
+
+ g_assert (priv->anchor_x != -1 && priv->anchor_y != -1);
+
+ /*cairo_move_to (ct, priv->anchor_x, priv->anchor_y);*/
+ /*cairo_line_to (ct, _new_x, _new_y);*/
+ /*cairo_stroke (ct);*/
+ }
+
return GDK_EVENT_PROPAGATE;
}
@@ -925,24 +1209,31 @@ gtk_image_view_set_scale (GtkImageView *image_view,
{
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (image_view);
double old_scale;
+ double pointer_x;
+ double pointer_y;
+
g_return_if_fail (GTK_IS_IMAGE_VIEW (image_view));
+ g_return_if_fail (scale >= 0.0);
old_scale = priv->scale;
- /*
- * XXX
- * If both gestures are enabled, do we always handle both at the same time,
- * or do we decide for one at the beginning and then stick to it?
- *
- */
+ pointer_x = gtk_widget_get_allocated_width (GTK_WIDGET (image_view)) / 2;
+ pointer_y = gtk_widget_get_allocated_height (GTK_WIDGET (image_view)) / 2;
+
+ if (priv->hadjustment)
+ pointer_x += gtk_adjustment_get_value (priv->hadjustment);
+
+ if (priv->vadjustment)
+ pointer_y += gtk_adjustment_get_value (priv->vadjustment);
+
gtk_image_view_set_scale_internal (image_view, scale);
if (priv->hadjustment != NULL && priv->vadjustment != NULL)
gtk_image_view_fix_point (image_view,
old_scale,
- gtk_widget_get_allocated_width ((GtkWidget *)image_view) / 2,
- gtk_widget_get_allocated_height ((GtkWidget *)image_view) / 2);
+ pointer_x,
+ pointer_y);
}
double
@@ -967,8 +1258,12 @@ gtk_image_view_set_angle (GtkImageView *image_view,
double angle)
{
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (image_view);
+ double angle_before;
g_return_if_fail (GTK_IS_IMAGE_VIEW (image_view));
+
+ angle_before = priv->angle;
+
if (angle > 360.0)
angle -= (int)(angle / 360.0) * 360;
else if (angle < 0.0)
@@ -977,21 +1272,66 @@ 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;
- g_object_notify_by_pspec ((GObject *)image_view,
- widget_props[PROP_ANGLE]);
+
+ /*priv->size_valid = FALSE;*/
+
gtk_image_view_update_adjustments (image_view);
- if (priv->fit_allocation)
- gtk_widget_queue_draw ((GtkWidget *)image_view);
- else
- gtk_widget_queue_resize ((GtkWidget *)image_view);
+
+ g_object_notify_by_pspec (G_OBJECT (image_view),
+ widget_props[PROP_ANGLE]);
+
+
+ /* XXX DEBUG */
+ /*if (priv->hadjustment && priv->vadjustment)*/
+ /*{*/
+ static gboolean first = TRUE;
+
+ if (first)
+ {
+ priv->gesture_start_scale = angle_before;
+ first = FALSE;
+ }
+
+ /*priv->anchor_x = 200 + (gtk_widget_get_allocated_width (GTK_WIDGET (image_view))) / 2 - 200;*/
+ /*priv->anchor_y = 200 + (gtk_widget_get_allocated_height (GTK_WIDGET (image_view))) / 2 - 200;*/
+
+
+ priv->anchor_x = 5;
+ priv->anchor_y = 5;
+
+
+ gtk_image_view_fix_point_rotate (image_view,
+ angle_before,
+ priv->anchor_x,
+ priv->anchor_y,
+ &old_state);
+ /*}*/
+
+
+
+
+ /*if (priv->fit_allocation)*/
+ /*gtk_widget_queue_draw (GTK_WIDGET (image_view));*/
+ /*else*/
+ gtk_widget_queue_resize (GTK_WIDGET (image_view));
}
double
@@ -1028,7 +1368,7 @@ gtk_image_view_set_snap_angle (GtkImageView *image_view,
return;
priv->snap_angle = snap_angle;
- g_object_notify_by_pspec ((GObject *)image_view,
+ g_object_notify_by_pspec (G_OBJECT (image_view),
widget_props[PROP_SNAP_ANGLE]);
if (priv->snap_angle)
@@ -1074,23 +1414,24 @@ gtk_image_view_set_fit_allocation (GtkImageView *image_view,
return;
priv->fit_allocation = fit_allocation;
- g_object_notify_by_pspec ((GObject *)image_view,
+ g_object_notify_by_pspec (G_OBJECT (image_view),
widget_props[PROP_FIT_ALLOCATION]);
+ priv->size_valid = FALSE;
priv->scale_set = FALSE;
- g_object_notify_by_pspec ((GObject *)image_view,
+ g_object_notify_by_pspec (G_OBJECT (image_view),
widget_props[PROP_SCALE_SET]);
if (!priv->fit_allocation && !priv->scale_set)
{
priv->scale = 1.0;
- g_object_notify_by_pspec ((GObject *)image_view,
+ g_object_notify_by_pspec (G_OBJECT (image_view),
widget_props[PROP_SCALE]);
}
gtk_image_view_update_adjustments (image_view);
- gtk_widget_queue_resize ((GtkWidget *)image_view);
+ gtk_widget_queue_resize (GTK_WIDGET (image_view));
gtk_image_view_update_adjustments (image_view);
}
@@ -1115,7 +1456,7 @@ gtk_image_view_set_rotate_gesture_enabled (GtkImageView *image_view,
rotate_gesture_enabled = !!rotate_gesture_enabled;
priv->rotate_gesture_enabled = rotate_gesture_enabled;
- g_object_notify_by_pspec ((GObject *)image_view,
+ g_object_notify_by_pspec (G_OBJECT (image_view),
widget_props[PROP_ROTATE_GESTURE_ENABLED]);
}
@@ -1140,7 +1481,7 @@ gtk_image_view_set_zoom_gesture_enabled (GtkImageView *image_view,
zoom_gesture_enabled = !!zoom_gesture_enabled;
priv->zoom_gesture_enabled = zoom_gesture_enabled;
- g_object_notify_by_pspec ((GObject *)image_view,
+ g_object_notify_by_pspec (G_OBJECT (image_view),
widget_props[PROP_ZOOM_GESTURE_ENABLED]);
}
@@ -1184,21 +1525,21 @@ gtk_image_view_realize (GtkWidget *widget)
window = gtk_widget_get_parent_window (widget);
gtk_widget_set_window (widget, window);
- g_object_ref ((GObject *)window);
+ g_object_ref (G_OBJECT (window));
window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, GDK_WA_X | GDK_WA_Y);
priv->event_window = window;
gtk_widget_register_window (widget, priv->event_window);
- gdk_window_set_user_data (window, (GObject *) widget);
+ gdk_window_set_user_data (window, widget);
}
static void
gtk_image_view_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
- GtkImageView *image_view = (GtkImageView *)widget;
+ GtkImageView *image_view = GTK_IMAGE_VIEW (widget);
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (image_view);
gtk_widget_set_allocation (widget, allocation);
@@ -1210,16 +1551,19 @@ gtk_image_view_size_allocate (GtkWidget *widget,
allocation->width, allocation->height);
}
+ if (priv->fit_allocation)
+ priv->size_valid = FALSE;
+
gtk_image_view_update_adjustments (image_view);
}
static void
gtk_image_view_map (GtkWidget *widget)
{
- GtkImageViewPrivate *priv = gtk_image_view_get_instance_private ((GtkImageView *)widget);
+ GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (GTK_IMAGE_VIEW (widget));
if (priv->is_animation)
- gtk_image_view_start_animation ((GtkImageView *)widget);
+ gtk_image_view_start_animation (GTK_IMAGE_VIEW (widget));
if (priv->event_window)
gdk_window_show (priv->event_window);
@@ -1230,11 +1574,11 @@ gtk_image_view_map (GtkWidget *widget)
static void
gtk_image_view_unmap (GtkWidget *widget)
{
- GtkImageViewPrivate *priv = gtk_image_view_get_instance_private ((GtkImageView *)widget);
+ GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (GTK_IMAGE_VIEW (widget));
if (priv->is_animation)
- gtk_image_view_stop_animation ((GtkImageView *)widget);
+ gtk_image_view_stop_animation (GTK_IMAGE_VIEW (widget));
GTK_WIDGET_CLASS (gtk_image_view_parent_class)->unmap (widget);
}
@@ -1247,7 +1591,7 @@ adjustment_value_changed_cb (GtkAdjustment *adjustment,
gtk_image_view_update_adjustments (image_view);
- gtk_widget_queue_draw ((GtkWidget *)image_view);
+ gtk_widget_queue_draw (GTK_WIDGET (image_view));
}
static void
@@ -1255,7 +1599,7 @@ gtk_image_view_get_preferred_height (GtkWidget *widget,
int *minimal,
int *natural)
{
- GtkImageView *image_view = (GtkImageView *)widget;
+ GtkImageView *image_view = GTK_IMAGE_VIEW (widget);
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (image_view);
int width, height;
@@ -1281,7 +1625,7 @@ gtk_image_view_get_preferred_width (GtkWidget *widget,
int *minimal,
int *natural)
{
- GtkImageView *image_view = (GtkImageView *)widget;
+ GtkImageView *image_view = GTK_IMAGE_VIEW (widget);
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (image_view);
int width, height;
gtk_image_view_compute_bounding_box (image_view,
@@ -1307,7 +1651,7 @@ static gboolean
gtk_image_view_scroll_event (GtkWidget *widget,
GdkEventScroll *event)
{
- GtkImageView *image_view = (GtkImageView *)widget;
+ GtkImageView *image_view = GTK_IMAGE_VIEW (widget);
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (image_view);
double old_scale = priv->scale;
double new_scale = priv->scale - (0.1 * event->delta_y);
@@ -1438,8 +1782,8 @@ gtk_image_view_finalize (GObject *object)
static void
gtk_image_view_class_init (GtkImageViewClass *view_class)
{
- GObjectClass *object_class = (GObjectClass *)view_class;
- GtkWidgetClass *widget_class = (GtkWidgetClass *)view_class;
+ GObjectClass *object_class = G_OBJECT_CLASS (view_class);
+ GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (view_class);
object_class->set_property = gtk_image_view_set_property;
object_class->get_property = gtk_image_view_get_property;
@@ -1523,7 +1867,7 @@ gtk_image_view_class_init (GtkImageViewClass *view_class)
* Whether or not the angle property snaps to 90° steps. If this is enabled
* and the angle property gets set to a non-90° step, the new value will be
* set to the closest 90° step that is lower than the given angle.
- * Changing the angle from one 90° step to another will be transitioned. XXX
+ * Changing the angle from one 90° step to another will be transitioned
*
* Since: 3.18
*/
@@ -1548,24 +1892,14 @@ 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 *
@@ -1586,13 +1920,10 @@ gtk_image_view_replace_surface (GtkImageView *image_view,
priv->scale_factor = scale_factor;
priv->image_surface = surface;
+ 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
@@ -1604,7 +1935,6 @@ 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;
@@ -1618,23 +1948,18 @@ 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
@@ -1835,6 +2160,7 @@ gtk_image_view_set_pixbuf (GtkImageView *image_view,
g_return_if_fail (GTK_IS_IMAGE_VIEW (image_view));
g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
+ g_return_if_fail (scale_factor > 0);
if (priv->is_animation)
@@ -1903,7 +2229,7 @@ gtk_image_view_set_surface (GtkImageView *image_view,
/**
* gtk_image_view_set_animation:
* @image_view: A #GtkImageView instance
- * @animation: The #GdkAnimation to use
+ * @animation: The #GdkPixbufAnimation to use
* @scale_factor: The scale factor of the animation. This will
* be interpreted as "the given animation is supposed to be used
* with the given scale factor", i.e. if the animation's scale
@@ -1917,6 +2243,7 @@ gtk_image_view_set_animation (GtkImageView *image_view,
{
g_return_if_fail (GTK_IS_IMAGE_VIEW (image_view));
g_return_if_fail (GDK_IS_PIXBUF_ANIMATION (animation));
+ g_return_if_fail (scale_factor > 0);
gtk_image_view_replace_animation (image_view, animation, scale_factor);
}
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