![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
diff --git a/src/event-context.cpp b/src/event-context.cpp
index 2ab045e7e2d19d9fd742de27ebd7a3911e72d335..37711e9143fc89a656565280753dbb11a16fe97f 100644 (file)
--- a/src/event-context.cpp
+++ b/src/event-context.cpp
}
gdk_window_set_cursor(w->window, ec->cursor);
}
+ ec->desktop->waiting_cursor = false;
}
/**
* Calculates and keeps track of scroll acceleration.
* Subroutine of sp_event_context_private_root_handler().
*/
-static gdouble accelerate_scroll(GdkEvent *event, gdouble acceleration)
+static gdouble accelerate_scroll(GdkEvent *event, gdouble acceleration, SPCanvas *canvas)
{
guint32 time_diff = ((GdkEventKey *) event)->time - scroll_event_time;
+ glong slowest_buffer = canvas->slowest_buffer / 1000; // the buffer time is in usec, but event time is in msec
+
+ // reduce time interval by the time it took to paint slowest buffer,
+ // so that acceleration does not hiccup on complex slow-rendering drawings
+ if ((guint32) slowest_buffer <= time_diff)
+ time_diff -= slowest_buffer;
+ else
+ time_diff = 0;
/* key pressed within 500ms ? (1/2 second) */
if (time_diff > 500 || event->key.keyval != scroll_keyval) {
- scroll_multiply = 1;
+ scroll_multiply = 1; // abort acceleration
} else {
- scroll_multiply += acceleration;
+ scroll_multiply += acceleration; // continue acceleration
}
scroll_event_time = ((GdkEventKey *) event)->time;
@@ -395,10 +404,9 @@ static gint sp_event_context_private_root_handler(SPEventContext *event_context,
gobble_motion_events(panning == 2 ?
GDK_BUTTON2_MASK : GDK_BUTTON3_MASK);
- NR::Point const motion_w(event->motion.x,
- event->motion.y);
+ NR::Point const motion_w(event->motion.x, event->motion.y);
NR::Point const moved_w( motion_w - button_w );
- event_context->desktop->scroll_world(moved_w);
+ event_context->desktop->scroll_world(moved_w, true); // we're still scrolling, do not redraw
ret = TRUE;
}
} else if (zoom_rb) {
@@ -410,42 +418,55 @@ static gint sp_event_context_private_root_handler(SPEventContext *event_context,
&& ( abs( (gint) event->motion.y - yp ) < tolerance ) ) {
break; // do not drag if we're within tolerance from origin
}
-
- if (within_tolerance) {
- Inkscape::Rubberband::get()->start(desktop, motion_dt);
- } else {
- Inkscape::Rubberband::get()->move(motion_dt);
- }
-
// Once the user has moved farther than tolerance from the original location
// (indicating they intend to move the object, not click), then always process the
// motion notify coordinates as given (no snapping back to origin)
within_tolerance = false;
+
+ if (Inkscape::Rubberband::get()->is_started()) {
+ Inkscape::Rubberband::get()->move(motion_dt);
+ } else {
+ Inkscape::Rubberband::get()->start(desktop, motion_dt);
+ }
}
break;
case GDK_BUTTON_RELEASE:
xp = yp = 0;
if (within_tolerance && (panning || zoom_rb)) {
zoom_rb = 0;
+ if (panning) {
+ panning = 0;
+ sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
+ event->button.time);
+ }
NR::Point const event_w(event->button.x, event->button.y);
NR::Point const event_dt(desktop->w2d(event_w));
desktop->zoom_relative_keep_point(event_dt,
(event->button.state & GDK_SHIFT_MASK) ? 1/zoom_inc : zoom_inc);
desktop->updateNow();
- }
- if (panning == event->button.button) {
- panning = 0;
ret = TRUE;
+ } else if (panning == event->button.button) {
+ panning = 0;
sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate),
event->button.time);
+
+ // in slow complex drawings, some of the motion events are lost;
+ // to make up for this, we scroll it once again to the button-up event coordinates
+ // (i.e. canvas will always get scrolled all the way to the mouse release point,
+ // even if few intermediate steps were visible)
+ NR::Point const motion_w(event->button.x, event->button.y);
+ NR::Point const moved_w( motion_w - button_w );
+ event_context->desktop->scroll_world(moved_w);
desktop->updateNow();
+ ret = TRUE;
} else if (zoom_rb == event->button.button) {
zoom_rb = 0;
NR::Maybe<NR::Rect> const b = Inkscape::Rubberband::get()->getRectangle();
Inkscape::Rubberband::get()->stop();
- if (b != NR::Nothing() && !within_tolerance) {
- desktop->set_display_area(b.assume(), 10);
+ if (b && !within_tolerance) {
+ desktop->set_display_area(*b, 10);
}
+ ret = TRUE;
}
break;
case GDK_KEY_PRESS:
@@ -480,7 +501,7 @@ static gint sp_event_context_private_root_handler(SPEventContext *event_context,
case GDK_KP_Left:
case GDK_KP_4:
if (MOD__CTRL_ONLY) {
- int i = (int) floor(key_scroll * accelerate_scroll(event, acceleration));
+ int i = (int) floor(key_scroll * accelerate_scroll(event, acceleration, sp_desktop_canvas(desktop)));
gobble_key_events(get_group0_keyval(&event->key),
GDK_CONTROL_MASK);
event_context->desktop->scroll_world(i, 0);
@@ -491,7 +512,7 @@ static gint sp_event_context_private_root_handler(SPEventContext *event_context,
case GDK_KP_Up:
case GDK_KP_8:
if (MOD__CTRL_ONLY) {
- int i = (int) floor(key_scroll * accelerate_scroll(event, acceleration));
+ int i = (int) floor(key_scroll * accelerate_scroll(event, acceleration, sp_desktop_canvas(desktop)));
gobble_key_events(get_group0_keyval(&event->key),
GDK_CONTROL_MASK);
event_context->desktop->scroll_world(0, i);
@@ -502,7 +523,7 @@ static gint sp_event_context_private_root_handler(SPEventContext *event_context,
case GDK_KP_Right:
case GDK_KP_6:
if (MOD__CTRL_ONLY) {
- int i = (int) floor(key_scroll * accelerate_scroll(event, acceleration));
+ int i = (int) floor(key_scroll * accelerate_scroll(event, acceleration, sp_desktop_canvas(desktop)));
gobble_key_events(get_group0_keyval(&event->key),
GDK_CONTROL_MASK);
event_context->desktop->scroll_world(-i, 0);
@@ -513,7 +534,7 @@ static gint sp_event_context_private_root_handler(SPEventContext *event_context,
case GDK_KP_Down:
case GDK_KP_2:
if (MOD__CTRL_ONLY) {
- int i = (int) floor(key_scroll * accelerate_scroll(event, acceleration));
+ int i = (int) floor(key_scroll * accelerate_scroll(event, acceleration, sp_desktop_canvas(desktop)));
gobble_key_events(get_group0_keyval(&event->key),
GDK_CONTROL_MASK);
event_context->desktop->scroll_world(0, -i);