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Call meta_compositor_begin_move if there is a compositor

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Sat Feb 25 11:46:14 2006  Søren Sandmann  <sandmann@redhat.com>

	* src/display.c (meta_display_begin_grab_op): Call
	meta_compositor_begin_move if there is a compositor

	* src/compositor.c (meta_compositor_begin/update/end_move):
	Implement those functions.

	* src/spring-model.[ch]: New files
This commit is contained in:
Søren Sandmann 2006-02-25 16:54:39 +00:00 committed by Søren Sandmann Pedersen
parent e4cf87c985
commit b1847959b1
8 changed files with 747 additions and 354 deletions
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10
ChangeLog
View File

@ -1,3 +1,13 @@
Sat Feb 25 11:46:14 2006 Søren Sandmann <sandmann@redhat.com>
* src/display.c (meta_display_begin_grab_op): Call
meta_compositor_begin_move if there is a compositor
* src/compositor.c (meta_compositor_begin/update/end_move):
Implement those functions.
* src/spring-model.[ch]: New files
Thu Feb 23 15:40:52 2006 Søren Sandmann <sandmann@redhat.com>
* src/compositor.c (meta_compositor_manage_screen): Don't attempt

2
src/Makefile.am
View File

@ -70,6 +70,8 @@ metacity_SOURCES= \
screen.h \
session.c \
session.h \
spring-model.c \
spring-model.h \
stack.c \
stack.h \
tabpopup.c \

552
src/compositor.c
View File

@ -32,7 +32,6 @@
#ifdef HAVE_COMPOSITE_EXTENSIONS
#include <cm/node.h>
#include <cm/drawable-node.h>
#include <GL/gl.h>
#include <GL/glu.h>
#include <GL/glx.h>
@ -45,6 +44,7 @@
#include <X11/extensions/Xdamage.h>
#include <X11/extensions/Xfixes.h>
#include <X11/extensions/Xrender.h>
#include "spring-model.h"
#endif /* HAVE_COMPOSITE_EXTENSIONS */
#define FRAME_INTERVAL_MILLISECONDS ((int)(1000.0/40.0))
@ -59,6 +59,8 @@ typedef struct
int idle_id;
} ScreenInfo;
typedef struct MoveInfo MoveInfo;
struct MetaCompositor
{
MetaDisplay *meta_display;
@ -77,6 +79,8 @@ struct MetaCompositor
guint debug_updates : 1;
GList *ignored_damage;
MoveInfo *move_info;
};
#endif /* HAVE_COMPOSITE_EXTENSIONS */
@ -105,7 +109,7 @@ meta_compositor_new (MetaDisplay *display)
gboolean has_extensions;
compositor_display = ws_display_new (NULL);
has_extensions =
ws_display_init_composite (compositor_display) &&
ws_display_init_damage (compositor_display) &&
@ -120,7 +124,7 @@ meta_compositor_new (MetaDisplay *display)
return NULL;
}
ws_display_set_ignore_grabs (compositor_display, TRUE);
}
@ -132,10 +136,10 @@ meta_compositor_new (MetaDisplay *display)
compositor->meta_display = display;
compositor->window_hash =
g_hash_table_new_full (meta_unsigned_long_hash,
meta_unsigned_long_equal,
NULL,
free_window_hash_value);
g_hash_table_new_full (meta_unsigned_long_hash,
meta_unsigned_long_equal,
NULL,
free_window_hash_value);
compositor->enabled = TRUE;
@ -296,6 +300,11 @@ process_configure_notify (MetaCompositor *compositor,
&event->above);
}
#if 0
cm_drawable_node_set_size (node,
event->x, event->y, event->width, event->height);
#endif
handle_restacking (compositor, node, above_node);
}
#endif /* HAVE_COMPOSITE_EXTENSIONS */
@ -757,10 +766,8 @@ update (gpointer data)
glEnd ();
#endif
#if 0
glClearColor (0.0, 0.0, 0.0, 0.0);
glClear (GL_COLOR_BUFFER_BIT);
#endif
#if 0
glEnable (GL_TEXTURE_2D);
@ -973,9 +980,9 @@ meta_compositor_manage_screen (MetaCompositor *compositor,
Display *xdisplay;
Atom cm_sn_atom;
char buf[128];
if (screen->compositor_data)
return;
return;
scr_info->glw = ws_screen_get_gl_window (ws_screen);
scr_info->compositor_nodes = NULL;
@ -987,7 +994,7 @@ meta_compositor_manage_screen (MetaCompositor *compositor,
ws_display_init_composite (compositor->display);
ws_display_init_damage (compositor->display);
ws_display_init_fixes (compositor->display);
g_print ("redirecting\n");
ws_window_redirect_subwindows (root);
ws_window_set_override_redirect (scr_info->glw, TRUE);
@ -1046,11 +1053,11 @@ meta_compositor_unmanage_screen (MetaCompositor *compositor,
}
ws_window_raise (scr_info->glw);
g_print ("unredirecting\n");
ws_window_unredirect_subwindows (root);
ws_window_unmap (scr_info->glw);
/* We need to sync here, because if someone is furiously
* clicking the 'compositing manager' check box, we might
* attempt to redirect the window again before this unredirect
@ -1175,7 +1182,7 @@ interpolate_rectangle (gdouble t,
#endif
#define MINIMIZE_STYLE 1
#define MINIMIZE_STYLE 3
#ifndef HAVE_COMPOSITE_EXTENSIONS
#undef MINIMIZE_STYLE
@ -1236,10 +1243,12 @@ set_geometry (MiniInfo *info, gdouble elapsed)
interpolate_rectangle (elapsed, &info->current_geometry, &info->target_geometry, &rect);
#if 0
g_print ("y: %d %d (%f => %d)\n", info->current_geometry.y, info->target_geometry.y,
elapsed, rect.y);
g_print ("setting: %d %d %d %d\n", rect.x, rect.y, rect.width, rect.height);
#endif
cm_drawable_node_set_geometry (info->node,
rect.x, rect.y,
@ -1412,7 +1421,7 @@ run_animation_01 (gpointer data)
{
cm_drawable_node_set_viewable (info->node, FALSE);
cm_drawable_node_unset_geometry (info->node);
cm_drawable_node_unset_geometry (info->node);
cm_drawable_node_set_alpha (info->node, 1.0);
@ -1540,65 +1549,6 @@ do_minimize_animation (gpointer data)
#elif MINIMIZE_STYLE == 3
typedef struct XYPair Point;
typedef struct XYPair Vector;
typedef struct Spring Spring;
typedef struct Object Object;
typedef struct Model Model;
struct XYPair {
double x, y;
};
#define GRID_WIDTH 4
#define GRID_HEIGHT 4
#define MODEL_MAX_OBJECTS (GRID_WIDTH * GRID_HEIGHT)
#define MODEL_MAX_SPRINGS (MODEL_MAX_OBJECTS * 2)
#define DEFAULT_SPRING_K 5.0
#define DEFAULT_FRICTION 1.4
struct Spring {
Object *a;
Object *b;
/* Spring position at rest, from a to b:
offset = b.position - a.position
*/
Vector offset;
};
struct Object {
Vector force;
Point position;
Vector velocity;
double mass;
double theta;
int immobile;
};
struct Model {
int num_objects;
Object objects[MODEL_MAX_OBJECTS];
int num_springs;
Spring springs[MODEL_MAX_SPRINGS];
Object *anchor_object;
Vector anchor_offset;
double friction;/* Friction constant */
double k;/* Spring constant */
double last_time;
double steps;
};
typedef struct
{
CmDrawableNode *node;
@ -1606,13 +1556,14 @@ typedef struct
gboolean expand;
MetaCompositor *compositor;
ScreenInfo *scr_info;
MetaScreen *screen;
MetaRectangle rect;
double last_time;
MetaAnimationFinishedFunc finished_func;
gpointer finished_data;
Model model;
Model *model;
int button_x;
int button_y;
@ -1620,270 +1571,96 @@ typedef struct
int button_height;
} MiniInfo;
static void
object_init (Object *object,
double position_x, double position_y,
double velocity_x, double velocity_y, double mass)
{
object->position.x = position_x;
object->position.y = position_y;
object->velocity.x = velocity_x;
object->velocity.y = velocity_y;
object->mass = mass;
object->force.x = 0;
object->force.y = 0;
object->immobile = 0;
}
static void
spring_init (Spring *spring,
Object *object_a, Object *object_b,
double offset_x, double offset_y)
{
spring->a = object_a;
spring->b = object_b;
spring->offset.x = offset_x;
spring->offset.y = offset_y;
}
static void
model_add_spring (Model *model,
Object *object_a, Object *object_b,
double offset_x, double offset_y)
{
Spring *spring;
g_assert (model->num_springs < MODEL_MAX_SPRINGS);
spring = &model->springs[model->num_springs];
model->num_springs++;
spring_init (spring, object_a, object_b, offset_x, offset_y);
}
static void
model_init_grid (Model *model, MetaRectangle *rect, gboolean expand)
{
int x, y, i, v_x, v_y;
int hpad, vpad;
model->num_objects = MODEL_MAX_OBJECTS;
model->num_springs = 0;
i = 0;
if (expand) {
hpad = rect->width / 3;
vpad = rect->height / 3;
}
else {
hpad = rect->width / 6;
vpad = rect->height / 6;
}
for (y = 0; y < GRID_HEIGHT; y++)
for (x = 0; x < GRID_WIDTH; x++) {
v_x = random() % 40 - 20;
v_y = random() % 40 - 20;
if (expand)
object_init (&model->objects[i],
rect->x + x * rect->width / 6 + rect->width / 4,
rect->y + y * rect->height / 6 + rect->height / 4,
v_x, v_y, 20);
else
object_init (&model->objects[i],
rect->x + x * rect->width / 3,
rect->y + y * rect->height / 3,
v_x, v_y, 20);
if (x > 0)
model_add_spring (model,
&model->objects[i - 1],
&model->objects[i],
hpad, 0);
if (y > 0)
model_add_spring (model,
&model->objects[i - GRID_WIDTH],
&model->objects[i],
0, vpad);
i++;
}
}
static void
model_init (Model *model, MetaRectangle *rect, gboolean expand)
{
model->anchor_object = NULL;
model->k = DEFAULT_SPRING_K;
model->friction = DEFAULT_FRICTION;
model_init_grid (model, rect, expand);
model->steps = 0;
model->last_time = 0;
}
static void
object_apply_force (Object *object, double fx, double fy)
{
object->force.x += fx;
object->force.y += fy;
}
/* The model here can be understood as a rigid body of the spring's
* rest shape, centered on the vector between the two object
* positions. This rigid body is then connected by linear-force
* springs to each object. This model does degnerate into a simple
* spring for linear displacements, and does something reasonable for
* rotation.
*
* There are other possibilities for handling the rotation of the
* spring, and it might be interesting to explore something which has
* better length-preserving properties. For example, with the current
* model, an initial 180 degree rotation of the spring results in the
* spring collapsing down to 0 size before expanding back to it's
* natural size again.
*/
static void
spring_exert_forces (Spring *spring, double k)
{
Vector da, db;
Vector a, b;
a = spring->a->position;
b = spring->b->position;
/* A nice vector diagram would likely help here, but my ASCII-art
* skills aren't up to the task. Here's how to make your own
* diagram:
*
* Draw a and b, and the vector AB from a to b
* Find the center of AB
* Draw spring->offset so that its center point is on the center of AB
* Draw da from a to the initial point of spring->offset
* Draw db from b to the final point of spring->offset
*
* The math below should be easy to verify from the diagram.
*/
da.x = 0.5 * (b.x - a.x - spring->offset.x);
da.y = 0.5 * (b.y - a.y - spring->offset.y);
db.x = 0.5 * (a.x - b.x + spring->offset.x);
db.y = 0.5 * (a.y - b.y + spring->offset.y);
object_apply_force (spring->a, k *da.x, k * da.y);
object_apply_force (spring->b, k * db.x, k * db.y);
}
static void
model_step_object (Model *model, Object *object)
{
Vector acceleration;
object->theta += 0.05;
/* Slow down due to friction. */
object->force.x -= model->friction * object->velocity.x;
object->force.y -= model->friction * object->velocity.y;
acceleration.x = object->force.x / object->mass;
acceleration.y = object->force.y / object->mass;
if (object->immobile) {
object->velocity.x = 0;
object->velocity.y = 0;
} else {
object->velocity.x += acceleration.x;
object->velocity.y += acceleration.y;
object->position.x += object->velocity.x;
object->position.y += object->velocity.y;
}
object->force.x = 0.0;
object->force.y = 0.0;
}
static void
model_step (Model *model)
{
int i;
for (i = 0; i < model->num_springs; i++)
spring_exert_forces (&model->springs[i], model->k);
for (i = 0; i < model->num_objects; i++)
model_step_object (model, &model->objects[i]);
}
#define WOBBLE_TIME 1.0
static void
set_patch (CmDrawableNode *node,
Model *model,
gdouble blend,
MetaRectangle *target)
{
int i, j;
CmPoint points[4][4];
for (i = 0; i < 4; i++)
for (j = 0; j < 4; j++)
{
double obj_x, obj_y;
int p_x, p_y;
model_get_position (model, i, j, &obj_x, &obj_y);
#if 0
target_x = info->node->real_x + i * info->node->real_width / 3;
target_y = info->node->real_y + j * info->node->real_height / 3;
#endif
if (target)
{
p_x = target->x + i * target->width / 3;
p_y = target->y + j * target->height / 3;
points[j][i].x = (1 - blend) * obj_x + blend * p_x;
points[j][i].y = (1 - blend) * obj_y + blend * p_y;
}
else
{
points[j][i].x = obj_x;
points[j][i].y = obj_y;
}
}
cm_drawable_node_set_patch (node, points);
}
static gboolean
run_animation (gpointer data)
{
MiniInfo *info = data;
gdouble t, blend;
CmPoint points[4][4];
int i, j, steps, target_x, target_y;
double n_steps;
int i;
t = g_timer_elapsed (info->timer, NULL);
info->model.steps += (t - info->model.last_time) / 0.03;
info->model.last_time = t;
steps = floor(info->model.steps);
info->model.steps -= steps;
n_steps = floor ((t - info->last_time) * 75);
for (i = 0; i < steps; i++)
model_step (&info->model);
for (i = 0; i < n_steps; ++i)
model_step (info->model);
if (info->expand)
blend = t / WOBBLE_TIME;
else
blend = 0;
if (i > 0)
info->last_time = t;
for (i = 0; i < 4; i++)
for (j = 0; j < 4; j++) {
target_x = info->node->real_x + i * info->node->real_width / 3;
target_y = info->node->real_y + j * info->node->real_height / 3;
points[j][i].x =
(1 - blend) * info->model.objects[j * 4 + i].position.x +
blend * target_x;
points[j][i].y =
(1 - blend) * info->model.objects[j * 4 + i].position.y +
blend * target_y;
}
blend = t / WOBBLE_TIME;
set_patch (info->node, info->model, 0.0, NULL);
cm_drawable_node_set_patch (info->node, points);
if (info->expand)
cm_drawable_node_set_alpha (info->node, t / WOBBLE_TIME);
else
cm_drawable_node_set_alpha (info->node, 1.0 - t / WOBBLE_TIME);
if (t > WOBBLE_TIME) {
cm_drawable_node_set_viewable (info->node, info->expand);
cm_drawable_node_unset_geometry (info->node);
cm_drawable_node_set_alpha (info->node, 1.0);
if (info->finished_func)
info->finished_func (info->finished_data);
return FALSE;
}
else {
return TRUE;
}
if (t > WOBBLE_TIME)
{
cm_drawable_node_set_viewable (info->node, info->expand);
cm_drawable_node_unset_geometry (info->node);
cm_drawable_node_set_alpha (info->node, 1.0);
if (info->finished_func)
{
info->finished_func (info->finished_data);
model_destroy (info->model);
info->model = NULL;
}
return FALSE;
}
else
{
queue_repaint (info->node, info->screen);
return TRUE;
}
}
void
@ -1909,7 +1686,9 @@ meta_compositor_minimize (MetaCompositor *compositor,
info->rect = window->user_rect;
model_init (&info->model, &info->rect, FALSE);
info->model = model_new (&info->rect, FALSE);
info->last_time = 0.0;
info->expand = FALSE;
info->button_x = x;
@ -1918,7 +1697,7 @@ meta_compositor_minimize (MetaCompositor *compositor,
info->button_height = height;
info->compositor = compositor;
info->scr_info = screen->compositor_data;
info->screen = screen;
g_idle_add (run_animation, info);
#endif
@ -1947,7 +1726,7 @@ meta_compositor_unminimize (MetaCompositor *compositor,
info->rect = window->user_rect;
model_init (&info->model, &info->rect, TRUE);
info->model = model_new (&info->rect, TRUE);
info->expand = TRUE;
info->button_x = x;
@ -1956,7 +1735,7 @@ meta_compositor_unminimize (MetaCompositor *compositor,
info->button_height = height;
info->compositor = compositor;
info->scr_info = screen->compositor_data;
info->screen = screen;
g_idle_add (run_animation, info);
#endif
@ -2052,7 +1831,9 @@ void
meta_compositor_destroy (MetaCompositor *compositor)
{
#ifdef HAVE_COMPOSITE_EXTENSIONS
#if 0
GSList *list;
#endif
#if 0
/* FIXME */
@ -2064,3 +1845,122 @@ meta_compositor_destroy (MetaCompositor *compositor)
g_free (compositor);
#endif
}
#ifdef HAVE_COMPOSITE_EXTENSIONS
struct MoveInfo
{
GTimer *timer;
gboolean finished;
Model *model;
MetaScreen *screen;
CmDrawableNode *node;
gdouble last_time;
};
#endif
#ifdef HAVE_COMPOSITE_EXTENSIONS
static gboolean
wobble (gpointer data)
{
MoveInfo *info = data;
double t = g_timer_elapsed (info->timer, NULL);
if (info->finished && model_is_calm (info->model))
{
cm_drawable_node_unset_geometry (info->node);
g_free (info);
info = NULL;
return FALSE;
}
else
{
int i;
int n_steps;
n_steps = floor ((t - info->last_time) * 75);
for (i = 0; i < n_steps; ++i)
model_step (info->model);
if (i > 0)
info->last_time = t;
set_patch (info->node, info->model, 0.0, NULL);
queue_repaint (info->node, info->screen);
return TRUE;
}
}
#endif
static void
compute_window_rect (MetaWindow *window,
MetaRectangle *rect)
{
/* FIXME: does metacity include this function somewhere? */
if (window->frame)
{
*rect = window->frame->rect;
}
else
{
*rect = window->user_rect;
}
}
void
meta_compositor_begin_move (MetaCompositor *compositor,
MetaWindow *window,
MetaRectangle *initial,
int grab_x, int grab_y)
{
#ifdef HAVE_COMPOSITE_EXTENSIONS
MetaRectangle rect;
compositor->move_info = g_new0 (MoveInfo, 1);
compositor->move_info->last_time = 0.0;
compositor->move_info->timer = g_timer_new ();
compute_window_rect (window, &rect);
#if 0
g_print ("init: %d %d\n", initial->x, initial->y);
g_print ("window: %d %d\n", window->rect.x, window->rect.y);
g_print ("frame: %d %d\n", rect.x, rect.y);
g_print ("grab: %d %d\n", grab_x, grab_y);
#endif
compositor->move_info->model = model_new (&rect, TRUE);
compositor->move_info->node = window_to_node (window->display->compositor, window);
compositor->move_info->screen = window->screen;
model_begin_move (compositor->move_info->model, grab_x, grab_y);
g_idle_add (wobble, compositor->move_info);
#endif
}
void
meta_compositor_update_move (MetaCompositor *compositor,
MetaWindow *window,
int x, int y)
{
#ifdef HAVE_COMPOSITE_EXTENSIONS
model_update_move (compositor->move_info->model, x, y);
#endif
}
void
meta_compositor_end_move (MetaCompositor *compositor,
MetaWindow *window)
{
#ifdef HAVE_COMPOSITE_EXTENSIONS
compositor->move_info->finished = TRUE;
compositor->move_info = NULL;
#endif
}

10
src/compositor.h
View File

@ -70,4 +70,14 @@ meta_compositor_set_updates (MetaCompositor *compositor,
void
meta_compositor_destroy (MetaCompositor *compositor);
void meta_compositor_begin_move (MetaCompositor *compositor,
MetaWindow *window,
MetaRectangle *initial,
int grab_x, int grab_y);
void meta_compositor_update_move (MetaCompositor *compositor,
MetaWindow *window,
int x, int y);
void meta_compositor_end_move (MetaCompositor *compositor,
MetaWindow *window);
#endif /* META_COMPOSITOR_H */

21
src/display.c
View File

@ -1835,7 +1835,7 @@ event_callback (XEvent *event,
XAllowEvents (display->xdisplay,
mode, event->xbutton.time);
}
if (begin_move && window->has_move_func)
{
meta_display_begin_grab_op (display,
@ -3305,6 +3305,16 @@ meta_display_begin_grab_op (MetaDisplay *display,
{
Window grab_xwindow;
if (grab_op_is_mouse (op) && meta_grab_op_is_moving (op))
{
if (display->compositor)
{
meta_compositor_begin_move (display->compositor,
window, &window->rect,
root_x, root_y);
}
}
meta_topic (META_DEBUG_WINDOW_OPS,
"Doing grab op %u on window %s button %d pointer already grabbed: %d pointer pos %d,%d\n",
op, window ? window->desc : "none", button, pointer_already_grabbed,
@ -3635,6 +3645,15 @@ meta_display_end_grab_op (MetaDisplay *display,
meta_window_calc_showing (display->grab_window);
}
if (display->compositor &&
display->grab_window &&
grab_op_is_mouse (display->grab_op) &&
meta_grab_op_is_moving (display->grab_op))
{
meta_compositor_end_move (display->compositor,
display->grab_window);
}
if (display->grab_have_pointer)
{
meta_topic (META_DEBUG_WINDOW_OPS,

410
src/spring-model.c Normal file
View File

@ -0,0 +1,410 @@
#include "spring-model.h"
#include <math.h>
struct XYPair
{
double x, y;
};
#define GRID_WIDTH 4
#define GRID_HEIGHT 4
#define MODEL_MAX_OBJECTS (GRID_WIDTH * GRID_HEIGHT)
#define MODEL_MAX_SPRINGS (MODEL_MAX_OBJECTS * 2)
#define DEFAULT_SPRING_K 5.0
#define DEFAULT_FRICTION 1.4
struct Spring {
Object *a;
Object *b;
/* Spring position at rest, from a to b:
offset = b.position - a.position
*/
Vector offset;
};
struct Object {
Vector force;
Point position;
Vector velocity;
double mass;
double theta;
int immobile;
};
struct Model {
int num_objects;
Object objects[MODEL_MAX_OBJECTS];
int num_springs;
Spring springs[MODEL_MAX_SPRINGS];
Object *anchor_object;
Vector anchor_offset;
double friction;/* Friction constant */
double k;/* Spring constant */
double last_time;
double steps;
};
static void
object_init (Object *object,
double position_x, double position_y,
double velocity_x, double velocity_y, double mass)
{
object->position.x = position_x;
object->position.y = position_y;
object->velocity.x = velocity_x;
object->velocity.y = velocity_y;
object->mass = mass;
object->force.x = 0;
object->force.y = 0;
object->immobile = 0;
}
static void
spring_init (Spring *spring,
Object *object_a, Object *object_b,
double offset_x, double offset_y)
{
spring->a = object_a;
spring->b = object_b;
spring->offset.x = offset_x;
spring->offset.y = offset_y;
}
static void
model_add_spring (Model *model,
Object *object_a, Object *object_b,
double offset_x, double offset_y)
{
Spring *spring;
g_assert (model->num_springs < MODEL_MAX_SPRINGS);
spring = &model->springs[model->num_springs];
model->num_springs++;
spring_init (spring, object_a, object_b, offset_x, offset_y);
}
static void
object_apply_force (Object *object, double fx, double fy)
{
object->force.x += fx;
object->force.y += fy;
}
/* The model here can be understood as a rigid body of the spring's
* rest shape, centered on the vector between the two object
* positions. This rigid body is then connected by linear-force
* springs to each object. This model does degnerate into a simple
* spring for linear displacements, and does something reasonable for
* rotation.
*
* There are other possibilities for handling the rotation of the
* spring, and it might be interesting to explore something which has
* better length-preserving properties. For example, with the current
* model, an initial 180 degree rotation of the spring results in the
* spring collapsing down to 0 size before expanding back to it's
* natural size again.
*/
static void
spring_exert_forces (Spring *spring, double k)
{
Vector da, db;
Vector a, b;
a = spring->a->position;
b = spring->b->position;
/* A nice vector diagram would likely help here, but my ASCII-art
* skills aren't up to the task. Here's how to make your own
* diagram:
*
* Draw a and b, and the vector AB from a to b
* Find the center of AB
* Draw spring->offset so that its center point is on the center of AB
* Draw da from a to the initial point of spring->offset
* Draw db from b to the final point of spring->offset
*
* The math below should be easy to verify from the diagram.
*/
da.x = 0.5 * (b.x - a.x - spring->offset.x);
da.y = 0.5 * (b.y - a.y - spring->offset.y);
db.x = 0.5 * (a.x - b.x + spring->offset.x);
db.y = 0.5 * (a.y - b.y + spring->offset.y);
object_apply_force (spring->a, k * da.x, k * da.y);
object_apply_force (spring->b, k * db.x, k * db.y);
}
static void
model_step_object (Model *model, Object *object)
{
Vector acceleration;
object->theta += 0.05;
/* Slow down due to friction. */
object->force.x -= model->friction * object->velocity.x;
object->force.y -= model->friction * object->velocity.y;
acceleration.x = object->force.x / object->mass;
acceleration.y = object->force.y / object->mass;
if (object->immobile)
{
object->velocity.x = 0;
object->velocity.y = 0;
}
else
{
object->velocity.x += acceleration.x;
object->velocity.y += acceleration.y;
object->position.x += object->velocity.x;
object->position.y += object->velocity.y;
}
object->force.x = 0.0;
object->force.y = 0.0;
}
static void
model_init_grid (Model *model, MetaRectangle *rect, gboolean expand)
{
int x, y, i, v_x, v_y;
int hpad, vpad;
model->num_objects = MODEL_MAX_OBJECTS;
model->num_springs = 0;
i = 0;
if (expand)
{
hpad = rect->width / 3;
vpad = rect->height / 3;
}
else
{
hpad = rect->width / 6;
vpad = rect->height / 6;
}
for (y = 0; y < GRID_HEIGHT; y++)
for (x = 0; x < GRID_WIDTH; x++)
{
#if 0
v_x = 40 * g_random_double() - 20;
v_y = 40 * g_random_double() - 20;
#endif
v_x = v_y = 0;
#if 0
if (expand)
object_init (&model->objects[i],
rect->x + x * rect->width / 6 + rect->width / 4,
rect->y + y * rect->height / 6 + rect->height / 4,
v_x, v_y, 20);
else
#endif
{
#if 0
g_print ("obj: %d %d\n", rect->x + x * rect->width / 3,
rect->y + y * rect->height / 3);
#endif
object_init (&model->objects[i],
rect->x + x * rect->width / 3,
rect->y + y * rect->height / 3,
v_x, v_y, 15);
}
if (x > 0)
model_add_spring (model,
&model->objects[i - 1],
&model->objects[i],
hpad, 0);
if (y > 0)
model_add_spring (model,
&model->objects[i - GRID_WIDTH],
&model->objects[i],
0, vpad);
i++;
}
}
static void
model_init (Model *model, MetaRectangle *rect, gboolean expand)
{
model->anchor_object = NULL;
model->k = DEFAULT_SPRING_K;
model->friction = DEFAULT_FRICTION;
model_init_grid (model, rect, expand);
model->steps = 0;
model->last_time = 0;
}
Model *
model_new (MetaRectangle *rect, gboolean expand)
{
Model *model = g_new0 (Model, 1);
model_init (model, rect, expand);
return model;
}
static double
object_distance (Object *object, double x, double y)
{
double dx, dy;
dx = object->position.x - x;
dy = object->position.y - y;
return sqrt (dx*dx + dy*dy);
}
static Object *
model_find_nearest (Model *model, double x, double y)
{
Object *object = &model->objects[0];
double distance, min_distance = 0.0;
int i;
for (i = 0; i < model->num_objects; i++) {
distance = object_distance (&model->objects[i], x, y);
if (i == 0 || distance < min_distance) {
min_distance = distance;
object = &model->objects[i];
}
}
return object;
}
void
model_begin_move (Model *model, int x, int y)
{
if (model->anchor_object)
model->anchor_object->immobile = 0;
model->anchor_object = model_find_nearest (model, x, y);
model->anchor_offset.x = x - model->anchor_object->position.x;
model->anchor_offset.y = y - model->anchor_object->position.y;
g_print ("ypos: %f %f\n", model->anchor_object->position.y,
model->anchor_object->position.x);
g_print ("anchor offset: %f %f\n",
model->anchor_offset.x,
model->anchor_offset.y);
model->anchor_object->immobile = 1;
}
void
model_set_anchor (Model *model,
int x,
int y)
{
if (model->anchor_object)
model->anchor_object->immobile = 0;
model->anchor_object = model_find_nearest (model, x, y);
model->anchor_offset.x = model->anchor_object->position.x - x;
model->anchor_offset.y = model->anchor_object->position.y - y;
model->anchor_object->immobile = 1;
}
void
model_update_move (Model *model, int x, int y)
{
model->anchor_object->position.x = x - model->anchor_offset.x;
model->anchor_object->position.y = y - model->anchor_offset.y;
}
static void
on_end_move (Model *model)
{
if (model->anchor_object)
{
model->anchor_object->immobile = 0;
model->anchor_object = NULL;
}
}
#define EPSILON 0.01
gboolean
model_is_calm (Model *model)
{
int i, j;
gboolean calm = TRUE;
for (i = 0; i < model->num_objects; i++)
{
if (model->objects[i].velocity.x > EPSILON ||
model->objects[i].velocity.y > EPSILON ||
model->objects[i].velocity.x < - EPSILON ||
model->objects[i].velocity.y < - EPSILON)
{
return FALSE;
}
}
return TRUE;
}
void
model_step (Model *model)
{
int i;
for (i = 0; i < model->num_springs; i++)
spring_exert_forces (&model->springs[i], model->k);
for (i = 0; i < model->num_objects; i++)
model_step_object (model, &model->objects[i]);
}
void
model_destroy (Model *model)
{
g_free (model);
}
void
model_get_position (Model *model,
int i,
int j,
double *x,
double *y)
{
if (x)
*x = model->objects[j * 4 + i].position.x;
if (y)
*y = model->objects[j * 4 + i].position.y;
}

31
src/spring-model.h Normal file
View File

@ -0,0 +1,31 @@
#include "window.h"
typedef struct XYPair Point;
typedef struct XYPair Vector;
typedef struct Spring Spring;
typedef struct Object Object;
typedef struct Model Model;
Model *model_new (MetaRectangle *rectangle,
gboolean expand);
void model_destroy (Model *model);
void
model_get_position (Model *model,
int i,
int j,
double *x,
double *y);
void
model_step (Model *model);
void
model_destroy (Model *model);
gboolean
model_is_calm (Model *model);
void
model_set_anchor (Model *model,
int x,
int y);
void
model_begin_move (Model *model, int x, int y);
void
model_update_move (Model *model, int x, int y);

65
src/window.c
View File

@ -39,6 +39,7 @@
#include "resizepopup.h"
#include "xprops.h"
#include "group.h"
#include "flash.h"
#include "window-props.h"
#include "constraints.h"
#include "compositor.h"
@ -6661,22 +6662,23 @@ update_move (MetaWindow *window,
int new_x, new_y;
MetaRectangle old;
int shake_threshold;
MetaDisplay *display = window->display;
window->display->grab_latest_motion_x = x;
window->display->grab_latest_motion_y = y;
display->grab_latest_motion_x = x;
display->grab_latest_motion_y = y;
dx = x - window->display->grab_anchor_root_x;
dy = y - window->display->grab_anchor_root_y;
dx = x - display->grab_anchor_root_x;
dy = y - display->grab_anchor_root_y;
new_x = window->display->grab_anchor_window_pos.x + dx;
new_y = window->display->grab_anchor_window_pos.y + dy;
new_x = display->grab_anchor_window_pos.x + dx;
new_y = display->grab_anchor_window_pos.y + dy;
meta_verbose ("x,y = %d,%d anchor ptr %d,%d anchor pos %d,%d dx,dy %d,%d\n",
x, y,
window->display->grab_anchor_root_x,
window->display->grab_anchor_root_y,
window->display->grab_anchor_window_pos.x,
window->display->grab_anchor_window_pos.y,
display->grab_anchor_root_x,
display->grab_anchor_root_y,
display->grab_anchor_window_pos.x,
display->grab_anchor_window_pos.y,
dx, dy);
/* Don't bother doing anything if no move has been specified. (This
@ -6703,22 +6705,22 @@ update_move (MetaWindow *window,
/* move the unmaximized window to the cursor */
prop =
((double)(x - window->display->grab_initial_window_pos.x)) /
((double)window->display->grab_initial_window_pos.width);
((double)(x - display->grab_initial_window_pos.x)) /
((double)display->grab_initial_window_pos.width);
window->display->grab_initial_window_pos.x =
display->grab_initial_window_pos.x =
x - window->saved_rect.width * prop;
window->display->grab_initial_window_pos.y = y;
display->grab_initial_window_pos.y = y;
if (window->frame)
{
window->display->grab_initial_window_pos.y += window->frame->child_y / 2;
display->grab_initial_window_pos.y += window->frame->child_y / 2;
}
window->saved_rect.x = window->display->grab_initial_window_pos.x;
window->saved_rect.y = window->display->grab_initial_window_pos.y;
window->display->grab_anchor_root_x = x;
window->display->grab_anchor_root_y = y;
window->saved_rect.x = display->grab_initial_window_pos.x;
window->saved_rect.y = display->grab_initial_window_pos.y;
display->grab_anchor_root_x = x;
display->grab_anchor_root_y = y;
meta_window_unmaximize (window,
META_MAXIMIZE_HORIZONTAL |
@ -6766,9 +6768,9 @@ update_move (MetaWindow *window,
META_MAXIMIZE_VERTICAL);
}
window->display->grab_initial_window_pos = work_area;
window->display->grab_anchor_root_x = x;
window->display->grab_anchor_root_y = y;
display->grab_initial_window_pos = work_area;
display->grab_anchor_root_x = x;
display->grab_anchor_root_y = y;
window->shaken_loose = FALSE;
meta_window_maximize (window,
@ -6780,8 +6782,8 @@ update_move (MetaWindow *window,
}
}
if (window->display->grab_wireframe_active)
old = window->display->grab_wireframe_rect;
if (display->grab_wireframe_active)
old = display->grab_wireframe_rect;
else
{
old = window->rect;
@ -6804,10 +6806,19 @@ update_move (MetaWindow *window,
snap,
FALSE);
if (window->display->grab_wireframe_active)
if (display->compositor)
{
int root_x = new_x - display->grab_anchor_window_pos.x + display->grab_anchor_root_x;
int root_y = new_y - display->grab_anchor_window_pos.y + display->grab_anchor_root_y;
meta_compositor_update_move (display->compositor,
window, root_x, root_y);
}
if (display->grab_wireframe_active)
meta_window_update_wireframe (window, new_x, new_y,
window->display->grab_wireframe_rect.width,
window->display->grab_wireframe_rect.height);
display->grab_wireframe_rect.width,
display->grab_wireframe_rect.height);
else
meta_window_move (window, TRUE, new_x, new_y);
}