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app: simplify scroll offset calculation for middle-mouse scrolling

This commit is contained in:
Michael Natterer 2013-04-20 08:37:15 +02:00
parent 9785c4e1a3
commit 6b8426874d
2 changed files with 13 additions and 12 deletions
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21
app/display/gimpdisplayshell-tool-events.c
View File

@ -842,10 +842,11 @@ gimp_display_shell_canvas_tool_events (GtkWidget *canvas,
: mevent->y);
gimp_display_shell_scroll (shell,
(shell->scroll_start_x - x -
shell->offset_x),
(shell->scroll_start_y - y -
shell->offset_y));
shell->scroll_last_x - x,
shell->scroll_last_y - y);
shell->scroll_last_x = x;
shell->scroll_last_y = y;
}
else if (state & GDK_BUTTON1_MASK)
{
@ -1412,9 +1413,9 @@ gimp_display_shell_start_scrolling (GimpDisplayShell *shell,
gimp_display_shell_pointer_grab (shell, event, GDK_POINTER_MOTION_MASK);
shell->scrolling = TRUE;
shell->scroll_start_x = x + shell->offset_x;
shell->scroll_start_y = y + shell->offset_y;
shell->scrolling = TRUE;
shell->scroll_last_x = x;
shell->scroll_last_y = y;
gimp_display_shell_set_override_cursor (shell, GDK_FLEUR);
}
@ -1427,9 +1428,9 @@ gimp_display_shell_stop_scrolling (GimpDisplayShell *shell,
gimp_display_shell_unset_override_cursor (shell);
shell->scrolling = FALSE;
shell->scroll_start_x = 0;
shell->scroll_start_y = 0;
shell->scrolling = FALSE;
shell->scroll_last_x = 0;
shell->scroll_last_y = 0;
gimp_display_shell_pointer_ungrab (shell, event);
}

4
app/display/gimpdisplayshell.h
View File

@ -174,8 +174,8 @@ struct _GimpDisplayShell
const gchar *space_shaded_tool;
gboolean scrolling;
gint scroll_start_x;
gint scroll_start_y;
gint scroll_last_x;
gint scroll_last_y;
gpointer scroll_info;
GimpDrawable *mask;