double x = xr.first;
double y = yr.first;
- double amount = 8;
-
- if (Keyboard::modifier_state_contains (ev->state, Keyboard::SecondaryModifier)) {
- amount = 64;
- } else if (Keyboard::modifier_state_contains (ev->state, Keyboard::TertiaryModifier)) {
- amount = 1;
- }
-
- if (Keyboard::modifier_state_equals (ev->state, Keyboard::SecondaryModifier)) {
-
- /* secondary-wheel == left-right scrolling */
-
- if (ev->direction == GDK_SCROLL_UP) {
- x -= amount;
- } else if (ev->direction == GDK_SCROLL_DOWN) {
- x += amount;
- }
-
- } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
-
- /* primary-wheel == zoom */
-
- if (ev->direction == GDK_SCROLL_UP) {
- _editor->temporal_zoom_step (false);
- } else {
- _editor->temporal_zoom_step (true);
- }
-
- } else {
-
- if (ev->direction == GDK_SCROLL_DOWN) {
- y += amount;
- } else if (ev->direction == GDK_SCROLL_UP) {
- y -= amount;
- } else if (ev->direction == GDK_SCROLL_LEFT) {
- x -= amount;
- } else if (ev->direction == GDK_SCROLL_RIGHT) {
- x += amount;
- }
+ switch (ev->direction) {
+ case GDK_SCROLL_UP:
+ if (Keyboard::modifier_state_equals (ev->state, Keyboard::ScrollHorizontalModifier)) {
+ x -= 64;
+ } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::ScrollZoomHorizontalModifier)) {
+ _editor->temporal_zoom_step (false);
+ } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::ScrollZoomVerticalModifier)) {
+ yr.first += 4;
+ yr.second -= 4;
+ set_editor (xr, yr);
+ return true;
+ } else {
+ y -= 8;
+ }
+ break;
+ case GDK_SCROLL_DOWN:
+ if (Keyboard::modifier_state_equals (ev->state, Keyboard::ScrollHorizontalModifier)) {
+ x += 64;
+ } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::ScrollZoomHorizontalModifier)) {
+ _editor->temporal_zoom_step (true);
+ } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::ScrollZoomVerticalModifier)) {
+ yr.first -= 4;
+ yr.second += 4;
+ set_editor (xr, yr);
+ return true;
+ } else {
+ y += 8;
+ }
+ break;
+ case GDK_SCROLL_LEFT:
+ if (Keyboard::modifier_state_contains (ev->state, Keyboard::SecondaryModifier)) {
+ x -= 64;
+ } else if (Keyboard::modifier_state_contains (ev->state, Keyboard::TertiaryModifier)) {
+ x -= 1;
+ } else {
+ x -= 8;
+ }
+ break;
+ case GDK_SCROLL_RIGHT:
+ if (Keyboard::modifier_state_contains (ev->state, Keyboard::SecondaryModifier)) {
+ x += 64;
+ } else if (Keyboard::modifier_state_contains (ev->state, Keyboard::TertiaryModifier)) {
+ x += 1;
+ } else {
+ x += 8;
+ }
+ break;
+ default:
+ break;
}
set_editor (x, y);