[gtk+/wip/baedert/gtkimageview: 66/160] wupp
- From: Timm Bäder <baedert src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtk+/wip/baedert/gtkimageview: 66/160] wupp
- Date: Sun, 5 Jun 2016 14:28:14 +0000 (UTC)
commit bb4e53b0ebf6691307281d7a80d89ee8b7ca1113
Author: Timm Bäder <mail baedert org>
Date: Tue Dec 29 13:01:07 2015 +0100
wupp
gtk/gtkimageview.c | 317 +++++++++++++++++++++-------------------------------
1 files changed, 126 insertions(+), 191 deletions(-)
---
diff --git a/gtk/gtkimageview.c b/gtk/gtkimageview.c
index 9365460..3e7175a 100644
--- a/gtk/gtkimageview.c
+++ b/gtk/gtkimageview.c
@@ -20,9 +20,6 @@
#define TRANSITION_DURATION (150.0 * 1000.0)
-double _new_x;
-double _new_y;
-
typedef struct
{
double hupper;
@@ -34,10 +31,6 @@ typedef struct
} State;
-int p_x[360];
-int p_y[360];
-
-
struct _GtkImageViewPrivate
{
double scale;
@@ -61,6 +54,9 @@ struct _GtkImageViewPrivate
/* Current anchor point, or -1/-1.
* Should never include the adjustment values */
+ /* XXX Relative to the bounding box center.
+ * BUT: We might want to change this, since for zooming
+ * widget coordinates make more sense? */
double anchor_x;
double anchor_y;
@@ -174,112 +170,6 @@ 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
-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;
-
- if (priv->size_valid)
- {
- *width = cached_width;
- *height = cached_height;
- if (scale_out)
- *scale_out = cached_scale;
- return;
- }
-
-
- if (!priv->image_surface)
- {
- *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 = sqrt ((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;
-
- priv->size_valid = TRUE;
-}
-
-
/* 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? */
@@ -298,37 +188,61 @@ gtk_image_view_fix_anchor_rotate (GtkImageView *image_view,
g_message ("Old State: %s", state_str (old_state));
g_message ("New angle: %f", priv->angle);
+ g_message ("New scale: %f", priv->scale);
g_message ("Anchor: %f/%f", priv->anchor_x, priv->anchor_y);
+
+
+ /* As a first step, fix the anchor point with regard to the
+ * updated scale
+ */
+ {
+ double hvalue = gtk_adjustment_get_value (priv->hadjustment);
+ double vvalue = gtk_adjustment_get_value (priv->vadjustment);
+
+ /*double anchor_x = priv->anchor_x*/
+
+ /*double x_diff = (old_state->hvalue / old_state->scale * priv->scale) - priv->anchor_x;*/
+ /*double y_diff = (old_state->vvalue / old_state->scale * priv->scale) - priv->anchor_y;*/
+ double x_diff = (priv->anchor_x * priv->scale) - (priv->anchor_x * old_state->scale);
+ double y_diff = (priv->anchor_y * priv->scale) - (priv->anchor_y * old_state->scale);
+
+ g_message ("x_diff: %f", x_diff);
+ g_message ("y_diff: %f", y_diff);
+
+ gtk_adjustment_set_value (priv->hadjustment,
+ hvalue - x_diff);
+ gtk_adjustment_set_value (priv->vadjustment,
+ vvalue - y_diff);
+ }
+
+
/* 1) Calculate the angle of our anchor point. */
- /*double anchor_angle = atan (priv->anchor_y / priv->anchor_x);*/
double anchor_angle = atan2 (priv->anchor_y, priv->anchor_x);
- double anchor_length = sqrt ((priv->anchor_x * priv->anchor_x) + (priv->anchor_y * priv->anchor_y));
+ double anchor_length = sqrt ((priv->anchor_x * priv->anchor_x) +
+ (priv->anchor_y * priv->anchor_y));
g_message ("Anchor angle: %f", RAD_TO_DEG (anchor_angle));
g_message ("Anchor length: %f", anchor_length);
/* 2) Calculate the position of our anchor point with increased angle */
double angle_diff = priv->angle - old_state->angle;
+ double scale_diff = priv->scale - old_state->scale;
anchor_angle += DEG_TO_RAD (angle_diff);
- /*anchor_angle += DEG_TO_RAD (old_state->angle);*/
- g_message ("anchor angle after: %f", RAD_TO_DEG (anchor_angle));
+ g_message ("anchor angle after: %f", RAD_TO_DEG (anchor_angle));
g_message ("Angle got increased by %f", angle_diff);
+ g_message ("Scale got increased by %f", scale_diff);
double new_anchor_x = cos (anchor_angle) * anchor_length;
double new_anchor_y = sin (anchor_angle) * anchor_length;
g_message ("New anchor: %f, %f", new_anchor_x, new_anchor_y);
- /* Once we get here, we assume the adjustments are already updated. */
- /*g_assert (gtk_adjustment_get_upper (priv->hadjustment) == bb_width);*/
- /*g_assert (gtk_adjustment_get_upper (priv->vadjustment) == bb_height);*/
-
double hupper_diff = gtk_adjustment_get_upper (priv->hadjustment) - old_state->hupper;
double vupper_diff = gtk_adjustment_get_upper (priv->vadjustment) - old_state->vupper;
g_message ("hupper_diff: %f", hupper_diff);
@@ -341,19 +255,19 @@ gtk_image_view_fix_anchor_rotate (GtkImageView *image_view,
- /*double diff_x = new_anchor_x - priv->anchor_x;*/
+
+
double diff_x = priv->anchor_x - new_anchor_x;
double diff_y = priv->anchor_y - new_anchor_y;
- /*double diff_y = new_anchor_y - priv->anchor_y;// + vupper_diff / 2.0;*/
g_message ("Diff: %f/%f", diff_x, diff_y);
- gtk_adjustment_set_value (priv->hadjustment,
- gtk_adjustment_get_value (priv->hadjustment) - diff_x);
+ /*gtk_adjustment_set_value (priv->hadjustment,*/
+ /*gtk_adjustment_get_value (priv->hadjustment) - diff_x);*/
- gtk_adjustment_set_value (priv->vadjustment,
- gtk_adjustment_get_value (priv->vadjustment) - diff_y);
+ /*gtk_adjustment_set_value (priv->vadjustment,*/
+ /*gtk_adjustment_get_value (priv->vadjustment) - diff_y);*/
g_message ("-------------------------");
@@ -413,7 +327,7 @@ gesture_rotate_cancel_cb (GtkGesture *gesture,
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (user_data);
gtk_image_view_set_angle (user_data, priv->gesture_start_angle);
priv->in_rotate = FALSE;
- priv->gesture_start_angle = FALSE; // XXX wow, lol
+ priv->gesture_start_angle = 0.0;
/*priv->anchor_x = -1;*/
/*priv->anchor_y = -1;*/
@@ -428,7 +342,6 @@ gesture_angle_changed_cb (GtkGestureRotate *gesture,
{
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (GTK_IMAGE_VIEW (widget));
double new_angle;
- /*double old_angle;*/
if (!priv->rotate_gesture_enabled)
{
@@ -442,6 +355,47 @@ gesture_angle_changed_cb (GtkGestureRotate *gesture,
priv->gesture_start_angle = priv->angle;
}
+
+
+
+ State old_state;
+ gtk_image_view_get_current_state (GTK_IMAGE_VIEW (widget), &old_state);
+
+
+
+
+ {
+ // These are in widget coordinates now.
+ double ax = gtk_widget_get_allocated_width (widget) / 2.0 + 5.0;
+ double ay = gtk_widget_get_allocated_height (widget) / 2.0 + 5.0;
+
+ // Calculate the difference between the current surface center
+ // and the current widget center + 5
+
+ double cx = gtk_adjustment_get_upper (priv->hadjustment) / 2.0 -
+ gtk_adjustment_get_value (priv->hadjustment);
+ double cy = gtk_adjustment_get_upper (priv->vadjustment) / 2.0 -
+ gtk_adjustment_get_value (priv->vadjustment);
+
+ // cx/cy now contain the bounding box center in widget coordinates.
+
+ g_message ("cx: %f", cx);
+ g_message ("cy: %f", cy);
+ g_message ("ax: %f", ax);
+ g_message ("ay: %f", ay);
+
+ // Now store the difference between cx/cy and ax/ay in anchor_x/anchor_y
+ priv->anchor_x = ax - cx;
+ priv->anchor_y = ay - cy;
+ }
+
+
+
+
+
+
+
+
new_angle = priv->gesture_start_angle + RAD_TO_DEG (delta);
if (new_angle == priv->angle)
@@ -454,6 +408,14 @@ gesture_angle_changed_cb (GtkGestureRotate *gesture,
priv->angle = new_angle;
gtk_image_view_update_adjustments (GTK_IMAGE_VIEW (widget));
+ g_assert (priv->hadjustment);
+ g_assert (priv->vadjustment);
+
+
+ gtk_image_view_fix_anchor_rotate (GTK_IMAGE_VIEW (widget),
+ priv->anchor_x,
+ priv->anchor_y,
+ &old_state);
// XXX
/*if (priv->hadjustment && priv->vadjustment)*/
/*gtk_image_view_fix_anchor_rotate (GTK_IMAGE_VIEW (widget),*/
@@ -746,10 +708,12 @@ gesture_scale_changed_cb (GtkGestureZoom *gesture,
new_scale);
if (priv->hadjustment || priv->vadjustment)
- gtk_image_view_fix_anchor (GTK_IMAGE_VIEW (widget),
- old_scale,
- priv->anchor_x,
- priv->anchor_y);
+ {
+ gtk_image_view_fix_anchor (GTK_IMAGE_VIEW (widget),
+ old_scale,
+ priv->anchor_x,
+ priv->anchor_y);
+ }
}
static void
@@ -757,19 +721,22 @@ gesture_begin_cb (GtkGesture *gesture,
GdkEventSequence *sequence,
gpointer user_data)
{
+ GtkImageView *image_view = GTK_IMAGE_VIEW (user_data);
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (user_data);
+ /*GtkWidget *widget = GTK_WIDGET (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;
- }
+
+ /*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;*/
+ /*}*/
}
@@ -778,17 +745,10 @@ gtk_image_view_init (GtkImageView *image_view)
{
GtkImageViewPrivate *priv = gtk_image_view_get_instance_private (image_view);
GtkWidget *widget = GTK_WIDGET (image_view);
- int i;
gtk_widget_set_can_focus (widget, TRUE);
gtk_widget_set_has_window (widget, FALSE);
- _new_x = -1;
- _new_y = -1;
-
- for (i = 0; i < 360; i ++)
- p_x[i] = p_y[i] = 0;
-
priv->scale = 1.0;
priv->angle = 0.0;
priv->snap_angle = FALSE;
@@ -807,14 +767,14 @@ gtk_image_view_init (GtkImageView *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);
+ /*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_gesture_group (priv->zoom_gesture,*/
+ /*priv->rotate_gesture);*/
}
@@ -1042,41 +1002,12 @@ gtk_image_view_draw (GtkWidget *widget, cairo_t *ct)
/* XXX @debug */
if (priv->anchor_x != -1 && priv->anchor_y != -1)
{
- double w = gtk_adjustment_get_upper (priv->hadjustment);
- double h = gtk_adjustment_get_upper (priv->vadjustment);
- double hv = gtk_adjustment_get_value (priv->hadjustment);
- double vv = gtk_adjustment_get_value (priv->vadjustment);
- /*double x = (w / 2.0) + priv->anchor_x - hv;*/
- /*double y = (h / 2.0) + priv->anchor_y - vv;*/
-
double x = gtk_widget_get_allocated_width (widget) / 2.0 + 5;
double y = gtk_widget_get_allocated_height (widget) / 2.0 + 5;
-
-
-
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_rectangle (ct, x - 1, y - 1, 2, 2);
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;
@@ -1247,6 +1178,7 @@ gtk_image_view_get_scale (GtkImageView *image_view)
* degrees. If this is < 0 or > 360, the value wil
* be wrapped. So e.g. setting this to 362 will result in a
* angle of 2, setting it to -2 will result in 358.
+ * Both 0 and 360 are possible.
*/
void
gtk_image_view_set_angle (GtkImageView *image_view,
@@ -1262,7 +1194,6 @@ gtk_image_view_set_angle (GtkImageView *image_view,
else if (angle < 0.0)
angle = 360.0 + (int)(angle / 360.0);
- // XXX 360.0 and 0.0 are the same thing, but both possible...
g_assert (angle >= 0.0);
g_assert (angle <= 360.0);
@@ -1292,10 +1223,10 @@ gtk_image_view_set_angle (GtkImageView *image_view,
// cx/cy now contain the bounding box center in widget coordinates.
- g_message ("cx: %f", cx);
- g_message ("cy: %f", cy);
- g_message ("ax: %f", ax);
- g_message ("ay: %f", ay);
+ /*g_message ("cx: %f", cx);*/
+ /*g_message ("cy: %f", cy);*/
+ /*g_message ("ax: %f", ax);*/
+ /*g_message ("ay: %f", ay);*/
// Now store the difference between cx/cy and ax/ay in anchor_x/anchor_y
priv->anchor_x = ax - cx;
@@ -1309,6 +1240,10 @@ gtk_image_view_set_angle (GtkImageView *image_view,
/*else*/
+ gtk_image_view_set_scale_internal (image_view,
+ priv->scale + .1);
+ g_message ("New scale: %f", priv->scale);
+
priv->angle = angle;
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