X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=blobdiff_plain;f=shell%2Fev-view.c;h=5944e348305db28d0e60026f86090b3a48e4969f;hb=1af6600934d1f723e5b492b8322e52a1144fb0af;hp=a6007c911897f83665166ce0f5c98cc3b1b9f70f;hpb=a73a364ed185d1d933bd032debd1e37d31a1426b;p=evince.git diff --git a/shell/ev-view.c b/shell/ev-view.c index a6007c91..5944e348 100644 --- a/shell/ev-view.c +++ b/shell/ev-view.c @@ -18,6 +18,7 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. */ +#include #include #include #include @@ -1521,6 +1522,12 @@ ev_view_handle_cursor_over_xy (EvView *view, gint x, gint y) ev_view_set_cursor (view, EV_VIEW_CURSOR_DRAG); return; } + + if (view->scroll_info.autoscrolling) { + if (view->cursor != EV_VIEW_CURSOR_AUTOSCROLL) + ev_view_set_cursor (view, EV_VIEW_CURSOR_AUTOSCROLL); + return; + } link = ev_view_get_link_at_location (view, x, y); @@ -2663,6 +2670,12 @@ ev_view_button_press_event (GtkWidget *widget, switch (event->button) { case 1: { + + if (view->scroll_info.autoscrolling == TRUE) { + view->scroll_info.autoscrolling = FALSE; + return TRUE; + } + EvImage *image; EvFormField *field; @@ -2701,6 +2714,10 @@ ev_view_button_press_event (GtkWidget *widget, case 2: /* use root coordinates as reference point because * scrolling changes window relative coordinates */ + if (view->scroll_info.autoscrolling == TRUE) { + view->scroll_info.autoscrolling = FALSE; + return TRUE; + } view->drag_info.start.x = event->x_root; view->drag_info.start.y = event->y_root; view->drag_info.hadj = gtk_adjustment_get_value (view->hadjustment); @@ -2710,6 +2727,8 @@ ev_view_button_press_event (GtkWidget *widget, return TRUE; case 3: + if (!view->scroll_info.autoscrolling) + view->scroll_info.start_y = event->y; return ev_view_do_popup_menu (view, event->x, event->y); } @@ -2874,6 +2893,66 @@ selection_scroll_timeout_cb (EvView *view) return TRUE; } +static gboolean +ev_view_drag_update_momentum (EvView *view) +{ + int i; + if (!view->drag_info.in_drag) + return FALSE; + + for (i = DRAG_HISTORY - 1; i > 0; i--) { + view->drag_info.buffer[i].x = view->drag_info.buffer[i-1].x; + view->drag_info.buffer[i].y = view->drag_info.buffer[i-1].y; + } + + /* Momentum is a moving average of 10ms granularity over + * the last 100ms with each 10ms stored in buffer. + */ + + view->drag_info.momentum.x = (view->drag_info.buffer[DRAG_HISTORY - 1].x - view->drag_info.buffer[0].x); + view->drag_info.momentum.y = (view->drag_info.buffer[DRAG_HISTORY - 1].y - view->drag_info.buffer[0].y); + + return TRUE; +} + +static gboolean +ev_view_scroll_drag_release (EvView *view) +{ + gdouble dhadj_value, dvadj_value; + gdouble oldhadjustment, oldvadjustment; + + view->drag_info.momentum.x /= 1.2; + view->drag_info.momentum.y /= 1.2; /* Alter these constants to change "friction" */ + + dhadj_value = view->hadjustment->page_size * + (gdouble)view->drag_info.momentum.x / GTK_WIDGET (view)->allocation.width; + dvadj_value = view->vadjustment->page_size * + (gdouble)view->drag_info.momentum.y / GTK_WIDGET (view)->allocation.height; + + oldhadjustment = gtk_adjustment_get_value (view->hadjustment); + oldvadjustment = gtk_adjustment_get_value (view->vadjustment); + + if (((oldhadjustment + dhadj_value) > (view->hadjustment->upper - view->hadjustment->page_size)) || + ((oldhadjustment + dhadj_value) < 0)) + view->drag_info.momentum.x *= -0.5; /* 0.5 rather than 1 means the edges absorb some momentum */ + if (((oldvadjustment + dvadj_value) > (view->vadjustment->upper - view->vadjustment->page_size)) || + ((oldvadjustment + dvadj_value) < 0)) + view->drag_info.momentum.y *= -0.5; + + gtk_adjustment_set_value (view->hadjustment, + MIN (oldhadjustment + dhadj_value, + view->hadjustment->upper - view->hadjustment->page_size)); + gtk_adjustment_set_value (view->vadjustment, + MIN (oldvadjustment + dvadj_value, + view->vadjustment->upper - view->vadjustment->page_size)); + + if (((view->drag_info.momentum.x < 1) && (view->drag_info.momentum.x > -1)) && + ((view->drag_info.momentum.y < 1) && (view->drag_info.momentum.y > -1))) + return FALSE; + else + return TRUE; +} + static gboolean ev_view_motion_notify_event (GtkWidget *widget, GdkEventMotion *event) @@ -2883,6 +2962,7 @@ ev_view_motion_notify_event (GtkWidget *widget, if (!view->document) return FALSE; + if (event->is_hint || event->window != view->layout.bin_window) { gtk_widget_get_pointer (widget, &x, &y); @@ -2891,6 +2971,10 @@ ev_view_motion_notify_event (GtkWidget *widget, y = event->y; } + if (view->scroll_info.autoscrolling) { + view->scroll_info.last_y = y; + } + if (view->selection_info.in_drag) { if (gtk_drag_check_threshold (widget, view->selection_info.start.x, @@ -2960,6 +3044,7 @@ ev_view_motion_notify_event (GtkWidget *widget, } else if (view->pressed_button == 2) { if (!view->drag_info.in_drag) { gboolean start; + int i; start = gtk_drag_check_threshold (widget, view->drag_info.start.x, @@ -2967,12 +3052,25 @@ ev_view_motion_notify_event (GtkWidget *widget, event->x_root, event->y_root); view->drag_info.in_drag = start; + view->drag_info.drag_timeout_id = g_timeout_add (10, + (GSourceFunc)ev_view_drag_update_momentum, view); + /* Set 100 to choose how long it takes to build up momentum */ + /* Clear out previous momentum info: */ + for (i = 0; i < DRAG_HISTORY; i++) { + view->drag_info.buffer[i].x = event->x; + view->drag_info.buffer[i].y = event->y; + } + view->drag_info.momentum.x = 0; + view->drag_info.momentum.y = 0; } if (view->drag_info.in_drag) { int dx, dy; gdouble dhadj_value, dvadj_value; + view->drag_info.buffer[0].x = event->x; + view->drag_info.buffer[0].y = event->y; + dx = event->x_root - view->drag_info.start.x; dy = event->y_root - view->drag_info.start.y; @@ -3010,6 +3108,9 @@ ev_view_button_release_event (GtkWidget *widget, view->drag_info.in_drag = FALSE; view->image_dnd_info.in_drag = FALSE; + + view->drag_info.release_timeout_id = g_timeout_add (20, + (GSourceFunc)ev_view_scroll_drag_release, view); if (view->pressed_button == 2) { ev_view_handle_cursor_over_xy (view, event->x, event->y); @@ -3737,6 +3838,21 @@ ev_view_destroy (GtkObject *object) view->loading_text = NULL; } + if (view->scroll_info.timeout_id) { + g_source_remove (view->scroll_info.timeout_id); + view->scroll_info.timeout_id = 0; + } + + if (view->drag_info.drag_timeout_id) { + g_source_remove (view->drag_info.drag_timeout_id); + view->drag_info.drag_timeout_id = 0; + } + + if (view->drag_info.release_timeout_id) { + g_source_remove (view->drag_info.release_timeout_id); + view->drag_info.release_timeout_id = 0; + } + ev_view_presentation_transition_stop (view); ev_view_set_scroll_adjustments (GTK_LAYOUT (view), NULL, NULL); @@ -4042,6 +4158,7 @@ ev_view_init (EvView *view) view->pressed_button = -1; view->cursor = EV_VIEW_CURSOR_NORMAL; view->drag_info.in_drag = FALSE; + view->scroll_info.autoscrolling = FALSE; view->selection_info.selections = NULL; view->selection_info.in_selection = FALSE; view->selection_info.in_drag = FALSE; @@ -4222,6 +4339,45 @@ ev_view_set_loading (EvView *view, gtk_widget_queue_draw (GTK_WIDGET (view)); } +static gboolean ev_view_autoscroll_cb (EvView *view) +{ + gdouble speed, value; + + /* If the user stops autoscrolling, autoscrolling will be + * set to false but the timeout will continue; stop the timeout: */ + if (!view->scroll_info.autoscrolling) { + view->scroll_info.timeout_id = 0; + return FALSE; + } + + if (view->scroll_info.last_y > view->scroll_info.start_y && + (view->scroll_info.last_y < view->scroll_info.start_y)) + return TRUE; + + /* Replace 100 with your speed of choice: The lower the faster. + * Replace 3 with another speed of choice: The higher, the faster it accelerated + * based on the distance of the starting point from the mouse + * (All also effected by the timeout interval of this callback) */ + + if (view->scroll_info.start_y > view->scroll_info.last_y) + speed = -pow ((((gdouble)view->scroll_info.start_y - view->scroll_info.last_y) / 100), 3); + else + speed = pow ((((gdouble)view->scroll_info.last_y - view->scroll_info.start_y) / 100), 3); + + value = gtk_adjustment_get_value (view->vadjustment); + value = CLAMP (value + speed, 0, view->vadjustment->upper - view->vadjustment->page_size); + gtk_adjustment_set_value (view->vadjustment, value); + + return TRUE; + +} + +void ev_view_autoscroll(EvView *view) +{ + view->scroll_info.autoscrolling = TRUE; + view->scroll_info.timeout_id = g_timeout_add (20, (GSourceFunc)(ev_view_autoscroll_cb), view); +} + void ev_view_set_document (EvView *view, EvDocument *document) @@ -4276,7 +4432,9 @@ ev_view_set_zoom (EvView *view, else scale = factor; - scale = CLAMP (scale, view->min_scale, view->max_scale); + scale = CLAMP (scale, + view->sizing_mode == EV_SIZING_FREE ? view->min_scale : 0, + view->max_scale); if (ABS (view->scale - scale) < EPSILON) return; @@ -5561,6 +5719,9 @@ ev_view_set_cursor (EvView *view, EvViewCursor new_cursor) case EV_VIEW_CURSOR_DRAG: cursor = gdk_cursor_new_for_display (display, GDK_FLEUR); break; + case EV_VIEW_CURSOR_AUTOSCROLL: + cursor = gdk_cursor_new_for_display (display, GDK_DOUBLE_ARROW); + break; } if (cursor) {