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Allow breaking out from maximization during a mouse resize

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A maximized window can't be resized from the screen edges (preserves
Fitts law goodness for the application), but it's still possible
to start a resize drag with alt-middle-button. Currently we just
don't let the user resize the window, while showing drag feedback;
it's more useful to let the user "break" out from the resize.

This provides a fast way to get a window partially aligned with
the screen edges - maximize, then alt-drag it out from one edge.

Behavior choices in this patch:

 - You can drag out a window out of maximization in both directions -
   smaller and larger. This can be potentilaly useful in multihead.

 - Dragging a window in only one direction unmaximizes the window
   fully, rather than leaving it in a horizontally/vertically
   maximized state. This is done because the horizontally/vertically
   maximzed states don't have clear visual representation and can
   be confusing to the user.

 - If you drag back to the maximized state after breaking out,
   maximization is restored, but you can't maximize a window by
   dragging to the full size if it didn't start out that way.

A new internal function meta_window_unmaximize_with_gravity() is
added for implementing this; it's a hybrid of
meta_window_unmaximize() and meta_window_resize_with_gravity().

Port of the metacity patch from Owen Taylor in bug 622517.

https://bugzilla.gnome.org/show_bug.cgi?id=629931
This commit is contained in:
Owen W. Taylor 2010-09-18 22:28:30 +02:00 committed by Florian Müllner
parent 5c3b0cda2e
commit 1c3f7c4088
4 changed files with 201 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/core/display-private.h
View File

@ -185,6 +185,9 @@ struct _MetaDisplay
guint grab_have_pointer : 1;
guint grab_have_keyboard : 1;
guint grab_frame_action : 1;
/* During a resize operation, the directions in which we've broken
* out of the initial maximization state */
guint grab_resize_unmaximize : 2; /* MetaMaximizeFlags */
MetaRectangle grab_initial_window_pos;
int grab_initial_x, grab_initial_y; /* These are only relevant for */
gboolean grab_threshold_movement_reached; /* raise_on_click == FALSE. */

1
src/core/display.c
View File

@ -3610,6 +3610,7 @@ meta_display_begin_grab_op (MetaDisplay *display,
display->grab_last_user_action_was_snap = FALSE;
#endif
display->grab_frame_action = frame_action;
display->grab_resize_unmaximize = 0;
if (display->grab_resize_timeout_id)
{

5
src/core/window-private.h
View File

@ -436,6 +436,11 @@ void meta_window_queue (MetaWindow *window,
void meta_window_maximize_internal (MetaWindow *window,
MetaMaximizeFlags directions,
MetaRectangle *saved_rect);
void meta_window_unmaximize_with_gravity (MetaWindow *window,
MetaMaximizeFlags directions,
int new_width,
int new_height,
int gravity);
void meta_window_make_above (MetaWindow *window);
void meta_window_unmake_above (MetaWindow *window);
void meta_window_shade (MetaWindow *window,

190
src/core/window.c
View File

@ -3250,9 +3250,11 @@ unmaximize_window_before_freeing (MetaWindow *window)
}
}
void
meta_window_unmaximize (MetaWindow *window,
MetaMaximizeFlags directions)
static void
meta_window_unmaximize_internal (MetaWindow *window,
MetaMaximizeFlags directions,
MetaRectangle *desired_rect,
int gravity)
{
gboolean unmaximize_horizontally, unmaximize_vertically;
@ -3297,13 +3299,13 @@ meta_window_unmaximize (MetaWindow *window,
meta_window_get_client_root_coords (window, &target_rect);
if (unmaximize_horizontally)
{
target_rect.x = window->saved_rect.x;
target_rect.width = window->saved_rect.width;
target_rect.x = desired_rect->x;
target_rect.width = desired_rect->width;
}
if (unmaximize_vertically)
{
target_rect.y = window->saved_rect.y;
target_rect.height = window->saved_rect.height;
target_rect.y = desired_rect->y;
target_rect.height = desired_rect->height;
}
/* Window's size hints may have changed while maximized, making
@ -3317,8 +3319,9 @@ meta_window_unmaximize (MetaWindow *window,
meta_window_get_outer_rect (window, &old_rect);
meta_window_move_resize (window,
FALSE,
meta_window_move_resize_internal (window,
META_IS_MOVE_ACTION | META_IS_RESIZE_ACTION,
gravity,
target_rect.x,
target_rect.y,
target_rect.width,
@ -3332,8 +3335,9 @@ meta_window_unmaximize (MetaWindow *window,
}
else
{
meta_window_move_resize (window,
FALSE,
meta_window_move_resize_internal (window,
META_IS_MOVE_ACTION | META_IS_RESIZE_ACTION,
gravity,
target_rect.x,
target_rect.y,
target_rect.width,
@ -3367,6 +3371,36 @@ meta_window_unmaximize (MetaWindow *window,
g_object_thaw_notify (G_OBJECT (window));
}
void
meta_window_unmaximize (MetaWindow *window,
MetaMaximizeFlags directions)
{
meta_window_unmaximize_internal (window, directions, &window->saved_rect,
NorthWestGravity);
}
/* Like meta_window_unmaximize(), but instead of unmaximizing to the
* saved position, we give the new desired size, and the gravity that
* determines the positioning relationship between the area occupied
* maximized and the new are. The arguments are similar to
* meta_window_resize_with_gravity().
*/
void
meta_window_unmaximize_with_gravity (MetaWindow *window,
MetaMaximizeFlags directions,
int new_width,
int new_height,
int gravity)
{
MetaRectangle desired_rect;
meta_window_get_position (window, &desired_rect.x, &desired_rect.y);
desired_rect.width = new_width;
desired_rect.height = new_height;
meta_window_unmaximize_internal (window, directions, &desired_rect, gravity);
}
void
meta_window_make_above (MetaWindow *window)
{
@ -7880,6 +7914,112 @@ update_move (MetaWindow *window,
meta_window_move (window, TRUE, new_x, new_y);
}
/* When resizing a maximized window by using alt-middle-drag (resizing
* with the grips or the menu for a maximized window is not enabled),
* the user can "break" out of the maximized state. This checks for
* that possibility. During such a break-out resize the user can also
* return to the previous maximization state by resizing back to near
* the original size.
*/
static MetaMaximizeFlags
check_resize_unmaximize(MetaWindow *window,
int dx,
int dy)
{
int threshold;
MetaMaximizeFlags new_unmaximize;
#define DRAG_THRESHOLD_TO_RESIZE_THRESHOLD_FACTOR 3
threshold = meta_ui_get_drag_threshold (window->screen->ui) *
DRAG_THRESHOLD_TO_RESIZE_THRESHOLD_FACTOR;
new_unmaximize = 0;
if (window->maximized_horizontally ||
(window->display->grab_resize_unmaximize & META_MAXIMIZE_HORIZONTAL) != 0)
{
int x_amount;
/* We allow breaking out of maximization in either direction, to make
* the window larger than the monitor as well as smaller than the
* monitor. If we wanted to only allow resizing smaller than the
* monitor, we'd use - dx for NE/E/SE and dx for SW/W/NW.
*/
switch (window->display->grab_op)
{
case META_GRAB_OP_RESIZING_NE:
case META_GRAB_OP_KEYBOARD_RESIZING_NE:
case META_GRAB_OP_RESIZING_E:
case META_GRAB_OP_KEYBOARD_RESIZING_E:
case META_GRAB_OP_RESIZING_SE:
case META_GRAB_OP_KEYBOARD_RESIZING_SE:
case META_GRAB_OP_RESIZING_SW:
case META_GRAB_OP_KEYBOARD_RESIZING_SW:
case META_GRAB_OP_RESIZING_W:
case META_GRAB_OP_KEYBOARD_RESIZING_W:
case META_GRAB_OP_RESIZING_NW:
case META_GRAB_OP_KEYBOARD_RESIZING_NW:
x_amount = dx < 0 ? - dx : dx;
break;
default:
x_amount = 0;
break;
}
if (x_amount > threshold)
new_unmaximize |= META_MAXIMIZE_HORIZONTAL;
}
if (window->maximized_vertically ||
(window->display->grab_resize_unmaximize & META_MAXIMIZE_VERTICAL) != 0)
{
int y_amount;
switch (window->display->grab_op)
{
case META_GRAB_OP_RESIZING_N:
case META_GRAB_OP_KEYBOARD_RESIZING_N:
case META_GRAB_OP_RESIZING_NE:
case META_GRAB_OP_KEYBOARD_RESIZING_NE:
case META_GRAB_OP_RESIZING_NW:
case META_GRAB_OP_KEYBOARD_RESIZING_NW:
case META_GRAB_OP_RESIZING_SE:
case META_GRAB_OP_KEYBOARD_RESIZING_SE:
case META_GRAB_OP_RESIZING_S:
case META_GRAB_OP_KEYBOARD_RESIZING_S:
case META_GRAB_OP_RESIZING_SW:
case META_GRAB_OP_KEYBOARD_RESIZING_SW:
y_amount = dy < 0 ? - dy : dy;
break;
default:
y_amount = 0;
break;
}
if (y_amount > threshold)
new_unmaximize |= META_MAXIMIZE_VERTICAL;
}
/* Metacity doesn't have a full user interface for only horizontally or
* vertically maximized, so while only unmaximizing in the direction drags
* has some advantages, it will also confuse the user. So, we always
* unmaximize both ways if possible.
*/
if (new_unmaximize != 0)
{
new_unmaximize = 0;
if (window->maximized_horizontally ||
(window->display->grab_resize_unmaximize & META_MAXIMIZE_HORIZONTAL) != 0)
new_unmaximize |= META_MAXIMIZE_HORIZONTAL;
if (window->maximized_vertically ||
(window->display->grab_resize_unmaximize & META_MAXIMIZE_VERTICAL) != 0)
new_unmaximize |= META_MAXIMIZE_VERTICAL;
}
return new_unmaximize;
}
static gboolean
update_resize_timeout (gpointer data)
{
@ -7904,6 +8044,7 @@ update_resize (MetaWindow *window,
int gravity;
MetaRectangle old;
double remaining;
MetaMaximizeFlags new_unmaximize;
window->display->grab_latest_motion_x = x;
window->display->grab_latest_motion_y = y;
@ -7965,6 +8106,8 @@ update_resize (MetaWindow *window,
}
}
new_unmaximize = check_resize_unmaximize (window, dx, dy);
switch (window->display->grab_op)
{
case META_GRAB_OP_RESIZING_SE:
@ -8075,11 +8218,36 @@ update_resize (MetaWindow *window,
snap,
FALSE);
if (new_unmaximize == window->display->grab_resize_unmaximize)
{
/* We don't need to update unless the specified width and height
* are actually different from what we had before.
*/
if (old.width != new_w || old.height != new_h)
{
if ((window->display->grab_resize_unmaximize == new_unmaximize))
meta_window_resize_with_gravity (window, TRUE, new_w, new_h, gravity);
}
}
else
{
if ((new_unmaximize & ~window->display->grab_resize_unmaximize) != 0)
{
meta_window_unmaximize_with_gravity (window,
(new_unmaximize & ~window->display->grab_resize_unmaximize),
new_w, new_h, gravity);
}
if ((window->display->grab_resize_unmaximize & ~new_unmaximize))
{
MetaRectangle saved_rect = window->saved_rect;
meta_window_maximize (window,
(window->display->grab_resize_unmaximize & ~new_unmaximize));
window->saved_rect = saved_rect;
}
}
window->display->grab_resize_unmaximize = new_unmaximize;
/* Store the latest resize time, if we actually resized. */
if (window->rect.width != old.width || window->rect.height != old.height)