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New function.

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2008-08-14  Martin Nordholts  <martinn@svn.gnome.org>

	* app/display/gimpdisplayshell-draw.[ch]
	(gimp_display_shell_draw_get_scaled_image_size_for_scale): New
	function.

	* app/display/gimpdisplayshell-scale.[ch]
	(gimp_display_shell_scale): When zooming out and the image
	starts to fit the viewport on a given axis, center on that
	axis.

	(gimp_display_shell_scale_image_starts_to_fit): New function.

	(gimp_display_shell_calculate_scale_x_and_y): New function.

	* app/display/gimpdisplayshell.c
	(gimp_display_shell_scale_changed): Use
	gimp_display_shell_calculate_scale_x_and_y().

	* app/display/gimpdisplayshell-scroll.c
	(gimp_display_shell_scroll_center_image): Bail out if neither
	vertical nor horizontal centering is requested.

svn path=/trunk/; revision=26562
This commit is contained in:
Martin Nordholts 2008-08-14 19:23:28 +00:00 committed by Martin Nordholts
parent 0fe3208158
commit c8ae8f67b4
7 changed files with 178 additions and 46 deletions
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23
ChangeLog
View file

@ -1,3 +1,26 @@
2008-08-14 Martin Nordholts <martinn@svn.gnome.org>
* app/display/gimpdisplayshell-draw.[ch]
(gimp_display_shell_draw_get_scaled_image_size_for_scale): New
function.
* app/display/gimpdisplayshell-scale.[ch]
(gimp_display_shell_scale): When zooming out and the image
starts to fit the viewport on a given axis, center on that
axis.
(gimp_display_shell_scale_image_starts_to_fit): New function.
(gimp_display_shell_calculate_scale_x_and_y): New function.
* app/display/gimpdisplayshell.c
(gimp_display_shell_scale_changed): Use
gimp_display_shell_calculate_scale_x_and_y().
* app/display/gimpdisplayshell-scroll.c
(gimp_display_shell_scroll_center_image): Bail out if neither
vertical nor horizontal centering is requested.
2008-08-14 Martin Nordholts <martinn@svn.gnome.org>
* app/display/gimpdisplayshell-scale.c

33
app/display/gimpdisplayshell-draw.c
View file

@ -48,6 +48,7 @@
#include "gimpdisplayshell-appearance.h"
#include "gimpdisplayshell-draw.h"
#include "gimpdisplayshell-render.h"
#include "gimpdisplayshell-scale.h"
#include "gimpdisplayshell-scroll.h"
#include "gimpdisplayshell-transform.h"
@ -76,9 +77,33 @@ void
gimp_display_shell_draw_get_scaled_image_size (const GimpDisplayShell *shell,
gint *w,
gint *h)
{
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
gimp_display_shell_draw_get_scaled_image_size_for_scale (shell,
gimp_zoom_model_get_factor (shell->zoom),
w,
h);
}
/**
* gimp_display_shell_draw_get_scaled_image_size_for_scale:
* @shell:
* @scale:
* @w:
* @h:
*
**/
void
gimp_display_shell_draw_get_scaled_image_size_for_scale (const GimpDisplayShell *shell,
gdouble scale,
gint *w,
gint *h)
{
GimpProjection *proj;
TileManager *tiles;
gdouble scale_x;
gdouble scale_y;
gint level;
gint level_width;
gint level_height;
@ -88,15 +113,17 @@ gimp_display_shell_draw_get_scaled_image_size (const GimpDisplayShell *shell,
proj = gimp_image_get_projection (shell->display->image);
level = gimp_projection_get_level (proj, shell->scale_x, shell->scale_y);
gimp_display_shell_calculate_scale_x_and_y (shell, scale, &scale_x, &scale_y);
level = gimp_projection_get_level (proj, scale_x, scale_y);
tiles = gimp_projection_get_tiles_at_level (proj, level, NULL);
level_width = tile_manager_width (tiles);
level_height = tile_manager_height (tiles);
if (w) *w = PROJ_ROUND (level_width * (shell->scale_x * (1 << level)));
if (h) *h = PROJ_ROUND (level_height * (shell->scale_y * (1 << level)));
if (w) *w = PROJ_ROUND (level_width * (scale_x * (1 << level)));
if (h) *h = PROJ_ROUND (level_height * (scale_y * (1 << level)));
}
void

5
app/display/gimpdisplayshell-draw.h
View file

@ -23,6 +23,11 @@
void gimp_display_shell_draw_get_scaled_image_size (const GimpDisplayShell *shell,
gint *w,
gint *h);
void gimp_display_shell_draw_get_scaled_image_size_for_scale
(const GimpDisplayShell *shell,
gdouble scale,
gint *w,
gint *h);
void gimp_display_shell_draw_guide (const GimpDisplayShell *shell,
GimpGuide *guide,
gboolean active);

84
app/display/gimpdisplayshell-scale.c
View file

@ -329,6 +329,45 @@ gimp_display_shell_scale_set_dot_for_dot (GimpDisplayShell *shell,
}
}
static void
gimp_display_shell_scale_image_starts_to_fit (GimpDisplayShell *shell,
gdouble new_scale,
gdouble current_scale,
gboolean *vertically,
gboolean *horizontally)
{
/* The image can only start to fit if we zoom out */
if (new_scale > current_scale)
{
*vertically = FALSE;
*horizontally = FALSE;
}
else
{
gint current_scale_width;
gint current_scale_height;
gint new_scale_width;
gint new_scale_height;
gimp_display_shell_draw_get_scaled_image_size_for_scale (shell,
current_scale,
&current_scale_width,
&current_scale_height);
gimp_display_shell_draw_get_scaled_image_size_for_scale (shell,
new_scale,
&new_scale_width,
&new_scale_height);
*vertically = current_scale_width > shell->disp_width &&
new_scale_width < shell->disp_width;
*horizontally = current_scale_height > shell->disp_height &&
new_scale_height < shell->disp_height;
}
}
/**
* gimp_display_shell_scale:
* @shell: the #GimpDisplayShell
@ -364,9 +403,25 @@ gimp_display_shell_scale (GimpDisplayShell *shell,
if (! SCALE_EQUALS (real_new_scale, current_scale))
{
gboolean vertically;
gboolean horizontally;
gimp_display_shell_scale_image_starts_to_fit (shell,
real_new_scale,
current_scale,
&vertically,
&horizontally);
gimp_display_shell_scale_get_zoom_focus (shell, real_new_scale, &x, &y);
gimp_display_shell_scale_to (shell, real_new_scale, x, y);
/* If an image axis started to fit due to zooming out, center on
* that axis in the display shell
*/
gimp_display_shell_scroll_center_image (shell,
vertically,
horizontally);
}
}
@ -591,6 +646,32 @@ gimp_display_shell_scale_resize (GimpDisplayShell *shell,
gimp_display_shell_resume (shell);
}
/**
* gimp_display_shell_calculate_scale_x_and_y:
* @shell:
* @scale:
* @scale_x:
* @scale_y:
*
**/
void
gimp_display_shell_calculate_scale_x_and_y (const GimpDisplayShell *shell,
gdouble scale,
gdouble *scale_x,
gdouble *scale_y)
{
gdouble xres;
gdouble yres;
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (GIMP_IS_IMAGE (shell->display->image));
gimp_image_get_resolution (shell->display->image, &xres, &yres);
if (scale_x) *scale_x = scale * SCREEN_XRES (shell) / xres;
if (scale_y) *scale_y = scale * SCREEN_YRES (shell) / yres;
}
void
gimp_display_shell_set_initial_scale (GimpDisplayShell *shell,
gdouble scale,
@ -806,9 +887,6 @@ gimp_display_shell_scale_dialog (GimpDisplayShell *shell)
gtk_widget_show (shell->scale_dialog);
}
/* private functions */
static void
gimp_display_shell_scale_dialog_response (GtkWidget *widget,
gint response_id,

62
app/display/gimpdisplayshell-scale.h
View file

@ -20,40 +20,44 @@
#define __GIMP_DISPLAY_SHELL_SCALE_H__
void gimp_display_shell_update_scrollbars_and_rulers (GimpDisplayShell *shell);
void gimp_display_shell_scale_update_scrollbars (GimpDisplayShell *shell);
void gimp_display_shell_scale_update_rulers (GimpDisplayShell *shell);
void gimp_display_shell_update_scrollbars_and_rulers (GimpDisplayShell *shell);
void gimp_display_shell_scale_update_scrollbars (GimpDisplayShell *shell);
void gimp_display_shell_scale_update_rulers (GimpDisplayShell *shell);
gboolean gimp_display_shell_scale_revert (GimpDisplayShell *shell);
gboolean gimp_display_shell_scale_can_revert (GimpDisplayShell *shell);
gboolean gimp_display_shell_scale_revert (GimpDisplayShell *shell);
gboolean gimp_display_shell_scale_can_revert (GimpDisplayShell *shell);
void gimp_display_shell_scale_set_dot_for_dot (GimpDisplayShell *shell,
gboolean dot_for_dot);
void gimp_display_shell_scale_set_dot_for_dot (GimpDisplayShell *shell,
gboolean dot_for_dot);
void gimp_display_shell_scale (GimpDisplayShell *shell,
GimpZoomType zoom_type,
gdouble scale);
void gimp_display_shell_scale_fit_in (GimpDisplayShell *shell);
gboolean gimp_display_shell_scale_image_is_within_viewport (GimpDisplayShell *shell);
void gimp_display_shell_scale_fill (GimpDisplayShell *shell);
void gimp_display_shell_scale_handle_zoom_revert (GimpDisplayShell *shell);
void gimp_display_shell_scale_by_values (GimpDisplayShell *shell,
gdouble scale,
gint offset_x,
gint offset_y,
gboolean resize_window);
void gimp_display_shell_scale_shrink_wrap (GimpDisplayShell *shell,
gboolean grow_only);
void gimp_display_shell_scale (GimpDisplayShell *shell,
GimpZoomType zoom_type,
gdouble scale);
void gimp_display_shell_scale_fit_in (GimpDisplayShell *shell);
gboolean gimp_display_shell_scale_image_is_within_viewport (GimpDisplayShell *shell);
void gimp_display_shell_scale_fill (GimpDisplayShell *shell);
void gimp_display_shell_scale_handle_zoom_revert (GimpDisplayShell *shell);
void gimp_display_shell_scale_by_values (GimpDisplayShell *shell,
gdouble scale,
gint offset_x,
gint offset_y,
gboolean resize_window);
void gimp_display_shell_scale_shrink_wrap (GimpDisplayShell *shell,
gboolean grow_only);
void gimp_display_shell_scale_resize (GimpDisplayShell *shell,
gboolean resize_window,
gboolean grow_only);
void gimp_display_shell_set_initial_scale (GimpDisplayShell *shell,
gdouble scale,
gint *display_width,
gint *display_height);
void gimp_display_shell_scale_resize (GimpDisplayShell *shell,
gboolean resize_window,
gboolean grow_only);
void gimp_display_shell_calculate_scale_x_and_y (const GimpDisplayShell *shell,
gdouble scale,
gdouble *scale_x,
gdouble *scale_y);
void gimp_display_shell_set_initial_scale (GimpDisplayShell *shell,
gdouble scale,
gint *display_width,
gint *display_height);
void gimp_display_shell_scale_dialog (GimpDisplayShell *shell);
void gimp_display_shell_scale_dialog (GimpDisplayShell *shell);
#endif /* __GIMP_DISPLAY_SHELL_SCALE_H__ */

3
app/display/gimpdisplayshell-scroll.c
View file

@ -267,7 +267,8 @@ gimp_display_shell_scroll_center_image (GimpDisplayShell *shell,
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
if (! shell->display ||
! shell->display->image)
! shell->display->image ||
(! vertically && ! horizontally))
return;
target_offset_x = shell->offset_x;

14
app/display/gimpdisplayshell.c
View file

@ -1396,16 +1396,10 @@ gimp_display_shell_scale_changed (GimpDisplayShell *shell)
if (image)
{
gdouble xres;
gdouble yres;
gimp_image_get_resolution (image, &xres, &yres);
shell->scale_x = (gimp_zoom_model_get_factor (shell->zoom) *
SCREEN_XRES (shell) / xres);
shell->scale_y = (gimp_zoom_model_get_factor (shell->zoom) *
SCREEN_YRES (shell) / yres);
gimp_display_shell_calculate_scale_x_and_y (shell,
gimp_zoom_model_get_factor (shell->zoom),
&shell->scale_x,
&shell->scale_y);
shell->x_dest_inc = gimp_image_get_width (image);
shell->y_dest_inc = gimp_image_get_height (image);