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gnome-control-center/panels/display/cc-display-arrangement.c

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/* cc-display-arrangement.c
*
* Copyright (C) 2007, 2008, 2017 Red Hat, Inc.
* Copyright (C) 2013 Intel, Inc.
*
* Written by: Benjamin Berg <bberg@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <math.h>
#include "cc-display-arrangement.h"
#include "cc-display-config.h"
struct _CcDisplayArrangement
{
GtkDrawingArea object;
CcDisplayConfig *config;
cairo_matrix_t to_widget;
cairo_matrix_t to_actual;
gboolean drag_active;
CcDisplayMonitor *selected_output;
CcDisplayMonitor *prelit_output;
/* Starting position of cursor inside the monitor. */
gdouble drag_anchor_x;
gdouble drag_anchor_y;
guint major_snap_distance;
};
typedef struct _CcDisplayArrangement CcDisplayArrangement;
enum {
PROP_0,
PROP_CONFIG,
PROP_SELECTED_OUTPUT,
PROP_LAST
};
typedef enum {
SNAP_DIR_NONE = 0,
SNAP_DIR_X = 1 << 0,
SNAP_DIR_Y = 1 << 1,
SNAP_DIR_BOTH = (SNAP_DIR_X | SNAP_DIR_Y),
} SnapDirection;
typedef struct {
cairo_matrix_t to_widget;
guint major_snap_distance;
gdouble dist_x;
gdouble dist_y;
gint mon_x;
gint mon_y;
SnapDirection snapped;
} SnapData;
#define MARGIN_PX 0
#define MARGIN_MON 0.66
#define MAJOR_SNAP_DISTANCE 25
#define MINOR_SNAP_DISTANCE 5
#define MIN_OVERLAP 25
G_DEFINE_TYPE (CcDisplayArrangement, cc_display_arrangement, GTK_TYPE_DRAWING_AREA)
static GParamSpec *props[PROP_LAST];
static void
apply_rotation_to_geometry (CcDisplayMonitor *output,
int *w,
int *h)
{
CcDisplayRotation rotation;
rotation = cc_display_monitor_get_rotation (output);
if ((rotation == CC_DISPLAY_ROTATION_90) || (rotation == CC_DISPLAY_ROTATION_270))
{
int tmp;
tmp = *h;
*h = *w;
*w = tmp;
}
}
/* get_geometry */
static void
get_scaled_geometry (CcDisplayConfig *config,
CcDisplayMonitor *output,
int *x,
int *y,
int *w,
int *h)
{
if (cc_display_monitor_is_active (output))
{
cc_display_monitor_get_geometry (output, x, y, w, h);
}
else
{
cc_display_monitor_get_geometry (output, x, y, NULL, NULL);
cc_display_mode_get_resolution (cc_display_monitor_get_preferred_mode (output), w, h);
}
if (cc_display_config_is_layout_logical (config))
{
double scale = cc_display_monitor_get_scale (output);
*w = round (*w / scale);
*h = round (*h / scale);
}
apply_rotation_to_geometry (output, w, h);
}
static void
get_bounding_box (CcDisplayConfig *config,
gint *x1,
gint *y1,
gint *x2,
gint *y2,
gint *max_w,
gint *max_h)
{
GList *outputs, *l;
g_assert (x1 && y1 && x2 && y2);
*x1 = *y1 = G_MAXINT;
*x2 = *y2 = G_MININT;
*max_w = 0;
*max_h = 0;
outputs = cc_display_config_get_monitors (config);
for (l = outputs; l; l = l->next)
{
CcDisplayMonitor *output = l->data;
int x, y, w, h;
if (!cc_display_monitor_is_useful (output))
continue;
get_scaled_geometry (config, output, &x, &y, &w, &h);
*x1 = MIN (*x1, x);
*y1 = MIN (*y1, y);
*x2 = MAX (*x2, x + w);
*y2 = MAX (*y2, y + h);
*max_w = MAX (*max_w, w);
*max_h = MAX (*max_h, h);
}
}
static void
monitor_get_drawing_rect (CcDisplayArrangement *self,
CcDisplayMonitor *output,
gint *x1,
gint *y1,
gint *x2,
gint *y2)
{
gdouble x, y;
get_scaled_geometry (self->config, output, x1, y1, x2, y2);
/* get_scaled_geometry returns the width and height */
*x2 = *x1 + *x2;
*y2 = *y1 + *y2;
x = *x1; y = *y1;
cairo_matrix_transform_point (&self->to_widget, &x, &y);
*x1 = round (x);
*y1 = round (y);
x = *x2; y = *y2;
cairo_matrix_transform_point (&self->to_widget, &x, &y);
*x2 = round (x);
*y2 = round (y);
}
static void
get_snap_distance (SnapData *snap_data,
gint mon_x,
gint mon_y,
gint new_x,
gint new_y,
gdouble *dist_x,
gdouble *dist_y)
{
gdouble local_dist_x, local_dist_y;
local_dist_x = ABS (mon_x - new_x);
local_dist_y = ABS (mon_y - new_y);
cairo_matrix_transform_distance (&snap_data->to_widget, &local_dist_x, &local_dist_y);
if (dist_x)
*dist_x = local_dist_x;
if (dist_y)
*dist_y = local_dist_y;
}
static void
maybe_update_snap (SnapData *snap_data,
gint mon_x,
gint mon_y,
gint new_x,
gint new_y,
SnapDirection snapped,
SnapDirection major_axis,
gint minor_unlimited)
{
SnapDirection update_snap = SNAP_DIR_NONE;
gdouble dist_x, dist_y;
gdouble dist;
get_snap_distance (snap_data, mon_x, mon_y, new_x, new_y, &dist_x, &dist_y);
dist = MAX (dist_x, dist_y);
/* Snap by the variable max snap distance on the major axis, ensure the
* minor axis is below the minimum snapping distance (often just zero). */
switch (major_axis)
{
case SNAP_DIR_X:
if (dist_x > snap_data->major_snap_distance)
return;
if (dist_y > MINOR_SNAP_DISTANCE)
{
if (new_y > mon_y && minor_unlimited <= 0)
return;
if (new_y < mon_y && minor_unlimited >= 0)
return;
}
break;
case SNAP_DIR_Y:
if (dist_y > snap_data->major_snap_distance)
return;
if (dist_x > MINOR_SNAP_DISTANCE)
{
if (new_x > mon_x && minor_unlimited <= 0)
return;
if (new_x < mon_x && minor_unlimited >= 0)
return;
}
break;
default:
g_assert_not_reached();
}
if (snapped == SNAP_DIR_BOTH)
{
if (snap_data->snapped == SNAP_DIR_NONE)
update_snap = SNAP_DIR_BOTH;
/* Update, if this is closer on the main axis. */
if (((major_axis == SNAP_DIR_X) && (dist_x < snap_data->dist_x)) ||
((major_axis == SNAP_DIR_Y) && (dist_y < snap_data->dist_y)))
{
update_snap = SNAP_DIR_BOTH;
}
/* Also update if we were only snapping in one direction earlier and it
* is better or equally good. */
if ((snap_data->snapped == SNAP_DIR_X && (dist <= snap_data->dist_x)) ||
(snap_data->snapped == SNAP_DIR_Y && (dist <= snap_data->dist_y)))
{
update_snap = SNAP_DIR_BOTH;
}
/* Also allow a minor axis to be added if the first axis remains identical. */
if (((snap_data->snapped == SNAP_DIR_X) && (major_axis == SNAP_DIR_X) && (new_x == snap_data->mon_x)) ||
((snap_data->snapped == SNAP_DIR_Y) && (major_axis == SNAP_DIR_Y) && (new_y == snap_data->mon_y)))
{
update_snap = SNAP_DIR_BOTH;
}
}
else if (snapped == SNAP_DIR_X)
{
if (dist_x < snap_data->dist_x || (snap_data->snapped & SNAP_DIR_X) == SNAP_DIR_NONE)
update_snap = SNAP_DIR_X;
}
else if (snapped == SNAP_DIR_Y)
{
if (dist_y < snap_data->dist_y || (snap_data->snapped & SNAP_DIR_Y) == SNAP_DIR_NONE)
update_snap = SNAP_DIR_Y;
}
else
{
g_assert_not_reached ();
}
if (update_snap & SNAP_DIR_X)
{
snap_data->dist_x = dist_x;
snap_data->mon_x = new_x;
snap_data->snapped = snap_data->snapped | SNAP_DIR_X;
}
if (update_snap & SNAP_DIR_Y)
{
snap_data->dist_y = dist_y;
snap_data->mon_y = new_y;
snap_data->snapped = snap_data->snapped | SNAP_DIR_Y;
}
}
static void
find_best_snapping (CcDisplayConfig *config,
CcDisplayMonitor *snap_output,
SnapData *snap_data)
{
GList *outputs, *l;
gint x1, y1, x2, y2;
gint w, h;
g_assert (snap_data != NULL);
get_scaled_geometry (config, snap_output, &x1, &y1, &w, &h);
x2 = x1 + w;
y2 = y1 + h;
#define OVERLAP(_s1, _s2, _t1, _t2) ((_s1) <= (_t2) && (_t1) <= (_s2))
outputs = cc_display_config_get_monitors (config);
for (l = outputs; l; l = l->next)
{
CcDisplayMonitor *output = l->data;
gint _x1, _y1, _x2, _y2, _h, _w;
gint bottom_snap_pos;
gint top_snap_pos;
gint left_snap_pos;
gint right_snap_pos;
gdouble dist_x, dist_y;
gdouble tmp;
if (output == snap_output)
continue;
if (!cc_display_monitor_is_useful (output))
continue;
get_scaled_geometry (config, output, &_x1, &_y1, &_w, &_h);
_x2 = _x1 + _w;
_y2 = _y1 + _h;
top_snap_pos = _y1 - h;
bottom_snap_pos = _y2;
left_snap_pos = _x1 - w;
right_snap_pos = _x2;
dist_y = 9999;
/* overlap on the X axis */
if (OVERLAP (x1, x2, _x1, _x2))
{
get_snap_distance (snap_data, x1, y1, x1, top_snap_pos, NULL, &dist_y);
get_snap_distance (snap_data, x1, y1, x1, bottom_snap_pos, NULL, &tmp);
dist_y = MIN(dist_y, tmp);
}
dist_x = 9999;
/* overlap on the Y axis */
if (OVERLAP (y1, y2, _y1, _y2))
{
get_snap_distance (snap_data, x1, y1, left_snap_pos, y1, &dist_x, NULL);
get_snap_distance (snap_data, x1, y1, right_snap_pos, y1, &tmp, NULL);
dist_x = MIN(dist_x, tmp);
}
/* We only snap horizontally or vertically to an edge of the same monitor */
if (dist_y < dist_x)
{
maybe_update_snap (snap_data, x1, y1, x1, top_snap_pos, SNAP_DIR_Y, SNAP_DIR_Y, 0);
maybe_update_snap (snap_data, x1, y1, x1, bottom_snap_pos, SNAP_DIR_Y, SNAP_DIR_Y, 0);
}
else if (dist_x < 9999)
{
maybe_update_snap (snap_data, x1, y1, left_snap_pos, y1, SNAP_DIR_X, SNAP_DIR_X, 0);
maybe_update_snap (snap_data, x1, y1, right_snap_pos, y1, SNAP_DIR_X, SNAP_DIR_X, 0);
}
/* Left/right edge identical on the top */
maybe_update_snap (snap_data, x1, y1, _x1, top_snap_pos, SNAP_DIR_BOTH, SNAP_DIR_Y, 0);
maybe_update_snap (snap_data, x1, y1, _x2 - w, top_snap_pos, SNAP_DIR_BOTH, SNAP_DIR_Y, 0);
/* Left/right edge identical on the bottom */
maybe_update_snap (snap_data, x1, y1, _x1, bottom_snap_pos, SNAP_DIR_BOTH, SNAP_DIR_Y, 0);
maybe_update_snap (snap_data, x1, y1, _x2 - w, bottom_snap_pos, SNAP_DIR_BOTH, SNAP_DIR_Y, 0);
/* Top/bottom edge identical on the left */
maybe_update_snap (snap_data, x1, y1, left_snap_pos, _y1, SNAP_DIR_BOTH, SNAP_DIR_X, 0);
maybe_update_snap (snap_data, x1, y1, left_snap_pos, _y2 - h, SNAP_DIR_BOTH, SNAP_DIR_X, 0);
/* Top/bottom edge identical on the right */
maybe_update_snap (snap_data, x1, y1, right_snap_pos, _y1, SNAP_DIR_BOTH, SNAP_DIR_X, 0);
maybe_update_snap (snap_data, x1, y1, right_snap_pos, _y2 - h, SNAP_DIR_BOTH, SNAP_DIR_X, 0);
/* If snapping is infinite, then add snapping points with minimal overlap
* to prevent detachment.
* This is similar to the above but simply re-defines the snapping pos
* to have only minimal overlap */
if (snap_data->major_snap_distance == G_MAXUINT)
{
/* Hanging over the left/right edge on the top */
maybe_update_snap (snap_data, x1, y1, _x1 - w + MIN_OVERLAP, top_snap_pos, SNAP_DIR_BOTH, SNAP_DIR_Y, 1);
maybe_update_snap (snap_data, x1, y1, _x2 - MIN_OVERLAP, top_snap_pos, SNAP_DIR_BOTH, SNAP_DIR_Y, -1);
/* Left/right edge identical on the bottom */
maybe_update_snap (snap_data, x1, y1, _x1 - w + MIN_OVERLAP, bottom_snap_pos, SNAP_DIR_BOTH, SNAP_DIR_Y, 1);
maybe_update_snap (snap_data, x1, y1, _x2 - MIN_OVERLAP, bottom_snap_pos, SNAP_DIR_BOTH, SNAP_DIR_Y, -1);
/* Top/bottom edge identical on the left */
maybe_update_snap (snap_data, x1, y1, left_snap_pos, _y1 - h + MIN_OVERLAP, SNAP_DIR_BOTH, SNAP_DIR_X, 1);
maybe_update_snap (snap_data, x1, y1, left_snap_pos, _y2 - MIN_OVERLAP, SNAP_DIR_BOTH, SNAP_DIR_X, -1);
/* Top/bottom edge identical on the right */
maybe_update_snap (snap_data, x1, y1, right_snap_pos, _y1 - h + MIN_OVERLAP, SNAP_DIR_BOTH, SNAP_DIR_X, 1);
maybe_update_snap (snap_data, x1, y1, right_snap_pos, _y2 - MIN_OVERLAP, SNAP_DIR_BOTH, SNAP_DIR_X, -1);
}
}
#undef OVERLAP
}
static void
cc_display_arrangement_update_matrices (CcDisplayArrangement *self)
{
GtkAllocation allocation;
gdouble scale, scale_h, scale_w;
gint x1, y1, x2, y2, max_w, max_h;
g_assert (self->config);
/* Do not update the matrices while the user is dragging things around. */
if (self->drag_active)
return;
get_bounding_box (self->config, &x1, &y1, &x2, &y2, &max_w, &max_h);
gtk_widget_get_allocation (GTK_WIDGET (self), &allocation);
scale_h = (gdouble) (allocation.width - 2 * MARGIN_PX) / (x2 - x1 + max_w * 2 * MARGIN_MON);
scale_w = (gdouble) (allocation.height - 2 * MARGIN_PX) / (y2 - y1 + max_h * 2 * MARGIN_MON);
scale = MIN (scale_h, scale_w);
cairo_matrix_init_identity (&self->to_widget);
cairo_matrix_translate (&self->to_widget, allocation.width / 2.0, allocation.height / 2.0);
cairo_matrix_scale (&self->to_widget, scale, scale);
cairo_matrix_translate (&self->to_widget, - (x1 + x2) / 2.0, - (y1 + y2) / 2.0);
self->to_actual = self->to_widget;
cairo_matrix_invert (&self->to_actual);
}
static CcDisplayMonitor*
cc_display_arrangement_find_monitor_at (CcDisplayArrangement *self,
gint x,
gint y)
{
g_autoptr(GList) outputs = NULL;
GList *l;
outputs = g_list_copy (cc_display_config_get_monitors (self->config));
if (self->selected_output)
outputs = g_list_prepend (outputs, self->selected_output);
for (l = outputs; l; l = l->next)
{
CcDisplayMonitor *output = l->data;
gint x1, y1, x2, y2;
if (!cc_display_monitor_is_useful (output))
continue;
monitor_get_drawing_rect (self, output, &x1, &y1, &x2, &y2);
if (x >= x1 && x <= x2 && y >= y1 && y <= y2)
return output;
}
return NULL;
}
static void
cc_display_arrangement_update_cursor (CcDisplayArrangement *self,
gboolean dragable)
{
g_autoptr(GdkCursor) cursor = NULL;
GdkWindow *window;
if (dragable)
cursor = gdk_cursor_new_for_display (gtk_widget_get_display (GTK_WIDGET (self)), GDK_FLEUR);
else
cursor = NULL;
window = gtk_widget_get_window (GTK_WIDGET (self));
if (window)
gdk_window_set_cursor (window, cursor);
}
static void
on_output_changed_cb (CcDisplayArrangement *self,
CcDisplayMonitor *output)
{
if (cc_display_config_count_useful_monitors (self->config) > 2)
self->major_snap_distance = MAJOR_SNAP_DISTANCE;
else
self->major_snap_distance = G_MAXUINT;
gtk_widget_queue_draw (GTK_WIDGET (self));
}
static gboolean
cc_display_arrangement_draw (GtkWidget *widget,
cairo_t *cr)
{
CcDisplayArrangement *self = CC_DISPLAY_ARRANGEMENT (widget);
GtkStyleContext *context = gtk_widget_get_style_context (widget);
g_autoptr(GList) outputs = NULL;
GList *l;
if (!self->config)
return FALSE;
cc_display_arrangement_update_matrices (self);
gtk_style_context_save (context);
gtk_style_context_add_class (context, "display-arrangement");
/* Draw in reverse order so that hit detection matches visual. Also pull
* the selected output to the back. */
outputs = g_list_copy (cc_display_config_get_monitors (self->config));
outputs = g_list_remove (outputs, self->selected_output);
if (self->selected_output != NULL)
outputs = g_list_prepend (outputs, self->selected_output);
outputs = g_list_reverse (outputs);
for (l = outputs; l; l = l->next)
{
CcDisplayMonitor *output = l->data;
GtkStateFlags state = GTK_STATE_FLAG_NORMAL;
GtkBorder border, padding, margin;
gint x1, y1, x2, y2;
gint w, h;
gint num;
if (!cc_display_monitor_is_useful (output))
continue;
gtk_style_context_save (context);
cairo_save (cr);
gtk_style_context_add_class (context, "monitor");
if (output == self->selected_output)
state |= GTK_STATE_FLAG_SELECTED;
if (output == self->prelit_output)
state |= GTK_STATE_FLAG_PRELIGHT;
gtk_style_context_set_state (context, state);
if (cc_display_monitor_is_primary (output) || cc_display_config_is_cloning (self->config))
gtk_style_context_add_class (context, "primary");
/* Set in cc-display-panel.c */
num = cc_display_monitor_get_ui_number (output);
monitor_get_drawing_rect (self, output, &x1, &y1, &x2, &y2);
w = x2 - x1;
h = y2 - y1;
cairo_translate (cr, x1, y1);
gtk_style_context_get_margin (context, state, &margin);
cairo_translate (cr, margin.left, margin.top);
w -= margin.left + margin.right;
h -= margin.top + margin.bottom;
gtk_render_background (context, cr, 0, 0, w, h);
gtk_render_frame (context, cr, 0, 0, w, h);
gtk_style_context_get_border (context, state, &border);
gtk_style_context_get_padding (context, state, &padding);
w -= border.left + border.right + padding.left + padding.right;
h -= border.top + border.bottom + padding.top + padding.bottom;
cairo_translate (cr, border.left + padding.left, border.top + padding.top);
if (num > 0)
{
PangoLayout *layout;
PangoFontDescription *font = NULL;
g_autofree gchar *number_str = NULL;
PangoRectangle extents;
GdkRGBA color;
gdouble text_width, text_padding;
gtk_style_context_add_class (context, "monitor-label");
gtk_style_context_remove_class (context, "monitor");
gtk_style_context_get_border (context, state, &border);
gtk_style_context_get_padding (context, state, &padding);
gtk_style_context_get_margin (context, state, &margin);
cairo_translate (cr, margin.left, margin.top);
number_str = g_strdup_printf ("%d", num);
gtk_style_context_get (context, state, "font", &font, NULL);
layout = gtk_widget_create_pango_layout (GTK_WIDGET (self), number_str);
pango_layout_set_font_description (layout, font);
pango_layout_get_extents (layout, NULL, &extents);
h = (extents.height - extents.y) / PANGO_SCALE;
text_width = (extents.width - extents.x) / PANGO_SCALE;
w = MAX (text_width, h - padding.left - padding.right);
text_padding = w - text_width;
w += border.left + border.right + padding.left + padding.right;
h += border.top + border.bottom + padding.top + padding.bottom;
gtk_render_background (context, cr, 0, 0, w, h);
gtk_render_frame (context, cr, 0, 0, w, h);
cairo_translate (cr, border.left + padding.left, border.top + padding.top);
cairo_translate (cr, extents.x + text_padding / 2, 0);
gtk_style_context_get_color (context, state, &color);
gdk_cairo_set_source_rgba (cr, &color);
gtk_render_layout (context, cr, 0, 0, layout);
g_object_unref (layout);
}
gtk_style_context_restore (context);
cairo_restore (cr);
}
gtk_style_context_restore (context);
return TRUE;
}
static gboolean
cc_display_arrangement_button_press_event (GtkWidget *widget,
GdkEventButton *event)
{
CcDisplayArrangement *self = CC_DISPLAY_ARRANGEMENT (widget);
CcDisplayMonitor *output;
gdouble event_x, event_y;
gint mon_x, mon_y;
if (!self->config)
return FALSE;
/* Only handle normal presses of the left mouse button. */
if (event->button != 1 || event->type != GDK_BUTTON_PRESS)
return FALSE;
g_return_val_if_fail (self->drag_active == FALSE, FALSE);
output = cc_display_arrangement_find_monitor_at (self, event->x, event->y);
if (!output)
return FALSE;
event_x = event->x;
event_y = event->y;
cairo_matrix_transform_point (&self->to_actual, &event_x, &event_y);
cc_display_monitor_get_geometry (output, &mon_x, &mon_y, NULL, NULL);
cc_display_arrangement_set_selected_output (self, output);
if (cc_display_config_count_useful_monitors (self->config) > 1)
{
self->drag_active = TRUE;
self->drag_anchor_x = event_x - mon_x;
self->drag_anchor_y = event_y - mon_y;
}
return TRUE;
}
static gboolean
cc_display_arrangement_button_release_event (GtkWidget *widget,
GdkEventButton *event)
{
CcDisplayArrangement *self = CC_DISPLAY_ARRANGEMENT (widget);
CcDisplayMonitor *output;
if (!self->config)
return FALSE;
/* Only handle left mouse button */
if (event->button != 1)
return FALSE;
if (!self->drag_active)
return FALSE;
self->drag_active = FALSE;
output = cc_display_arrangement_find_monitor_at (self, event->x, event->y);
cc_display_arrangement_update_cursor (self, output != NULL);
/* And queue a redraw to recenter everything */
gtk_widget_queue_draw (widget);
g_signal_emit_by_name (G_OBJECT (widget), "updated");
return TRUE;
}
static gboolean
cc_display_arrangement_motion_notify_event (GtkWidget *widget,
GdkEventMotion *event)
{
CcDisplayArrangement *self = CC_DISPLAY_ARRANGEMENT (widget);
gdouble event_x, event_y;
gint mon_x, mon_y;
SnapData snap_data;
if (!self->config)
return FALSE;
if (cc_display_config_count_useful_monitors (self->config) <= 1)
return FALSE;
if (!self->drag_active)
{
CcDisplayMonitor *output;
output = cc_display_arrangement_find_monitor_at (self, event->x, event->y);
cc_display_arrangement_update_cursor (self, output != NULL);
if (self->prelit_output != output)
gtk_widget_queue_draw (widget);
self->prelit_output = output;
return FALSE;
}
g_assert (self->selected_output);
event_x = event->x;
event_y = event->y;
cairo_matrix_transform_point (&self->to_actual, &event_x, &event_y);
mon_x = round (event_x - self->drag_anchor_x);
mon_y = round (event_y - self->drag_anchor_y);
/* The monitor is now at the location as if there was no snapping whatsoever. */
snap_data.snapped = SNAP_DIR_NONE;
snap_data.mon_x = mon_x;
snap_data.mon_y = mon_y;
snap_data.dist_x = 0;
snap_data.dist_y = 0;
snap_data.to_widget = self->to_widget;
snap_data.major_snap_distance = self->major_snap_distance;
cc_display_monitor_set_position (self->selected_output, mon_x, mon_y);
find_best_snapping (self->config, self->selected_output, &snap_data);
cc_display_monitor_set_position (self->selected_output, snap_data.mon_x, snap_data.mon_y);
return TRUE;
}
static void
cc_display_arrangement_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
CcDisplayArrangement *self = CC_DISPLAY_ARRANGEMENT (object);
switch (prop_id)
{
case PROP_CONFIG:
g_value_set_object (value, self->config);
break;
case PROP_SELECTED_OUTPUT:
g_value_set_object (value, self->selected_output);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
cc_display_arrangement_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
CcDisplayArrangement *obj = CC_DISPLAY_ARRANGEMENT (object);
switch (prop_id)
{
case PROP_CONFIG:
cc_display_arrangement_set_config (obj, g_value_get_object (value));
break;
case PROP_SELECTED_OUTPUT:
cc_display_arrangement_set_selected_output (obj, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
cc_display_arrangement_finalize (GObject *object)
{
CcDisplayArrangement *self = CC_DISPLAY_ARRANGEMENT (object);
g_clear_object (&self->config);
G_OBJECT_CLASS (cc_display_arrangement_parent_class)->finalize (object);
}
static void
cc_display_arrangement_class_init (CcDisplayArrangementClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
gobject_class->finalize = cc_display_arrangement_finalize;
gobject_class->get_property = cc_display_arrangement_get_property;
gobject_class->set_property = cc_display_arrangement_set_property;
widget_class->draw = cc_display_arrangement_draw;
widget_class->button_press_event = cc_display_arrangement_button_press_event;
widget_class->button_release_event = cc_display_arrangement_button_release_event;
widget_class->motion_notify_event = cc_display_arrangement_motion_notify_event;
props[PROP_CONFIG] = g_param_spec_object ("config", "Display Config",
"The display configuration to work with",
CC_TYPE_DISPLAY_CONFIG,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
props[PROP_SELECTED_OUTPUT] = g_param_spec_object ("selected-output", "Selected Output",
"The output that is currently selected on the configuration",
CC_TYPE_DISPLAY_MONITOR,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (gobject_class,
PROP_LAST,
props);
g_signal_new ("updated",
CC_TYPE_DISPLAY_ARRANGEMENT,
G_SIGNAL_RUN_LAST,
0, NULL, NULL, NULL,
G_TYPE_NONE, 0);
}
static void
cc_display_arrangement_init (CcDisplayArrangement *self)
{
/* XXX: Do we need to listen to touch events here? */
gtk_widget_add_events (GTK_WIDGET (self),
GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK);
self->major_snap_distance = MAJOR_SNAP_DISTANCE;
}
CcDisplayArrangement*
cc_display_arrangement_new (CcDisplayConfig *config)
{
return g_object_new (CC_TYPE_DISPLAY_ARRANGEMENT, "config", config, NULL);
}
CcDisplayConfig*
cc_display_arrangement_get_config (CcDisplayArrangement *self)
{
return self->config;
}
void
cc_display_arrangement_set_config (CcDisplayArrangement *self,
CcDisplayConfig *config)
{
const gchar *signals[] = { "rotation", "mode", "primary", "active", "scale", "position-changed", "is-usable" };
GList *outputs, *l;
guint i;
if (self->config)
{
outputs = cc_display_config_get_monitors (self->config);
for (l = outputs; l; l = l->next)
{
CcDisplayMonitor *output = l->data;
g_signal_handlers_disconnect_by_data (output, self);
}
}
g_clear_object (&self->config);
self->drag_active = FALSE;
/* Listen to all the signals */
if (config)
{
self->config = g_object_ref (config);
outputs = cc_display_config_get_monitors (self->config);
for (l = outputs; l; l = l->next)
{
CcDisplayMonitor *output = l->data;
for (i = 0; i < G_N_ELEMENTS (signals); ++i)
g_signal_connect_object (output, signals[i], G_CALLBACK (on_output_changed_cb), self, G_CONNECT_SWAPPED);
}
}
cc_display_arrangement_set_selected_output (self, NULL);
g_object_notify_by_pspec (G_OBJECT (self), props[PROP_CONFIG]);
}
CcDisplayMonitor*
cc_display_arrangement_get_selected_output (CcDisplayArrangement *self)
{
return self->selected_output;
}
void
cc_display_arrangement_set_selected_output (CcDisplayArrangement *self,
CcDisplayMonitor *output)
{
g_return_if_fail (self->drag_active == FALSE);
/* XXX: Could check that it actually belongs to the right config object. */
self->selected_output = output;
gtk_widget_queue_draw (GTK_WIDGET (self));
g_object_notify_by_pspec (G_OBJECT (self), props[PROP_SELECTED_OUTPUT]);
}
void
cc_display_config_snap_output (CcDisplayConfig *config,
CcDisplayMonitor *output)
{
SnapData snap_data;
gint x, y, w, h;
if (!cc_display_monitor_is_useful (output))
return;
if (cc_display_config_count_useful_monitors (config) <= 1)
return;
get_scaled_geometry (config, output, &x, &y, &w, &h);
snap_data.snapped = SNAP_DIR_NONE;
snap_data.mon_x = x;
snap_data.mon_y = y;
snap_data.dist_x = 0;
snap_data.dist_y = 0;
cairo_matrix_init_identity (&snap_data.to_widget);
snap_data.major_snap_distance = G_MAXUINT;
find_best_snapping (config, output, &snap_data);
cc_display_monitor_set_position (output, snap_data.mon_x, snap_data.mon_y);
}
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