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feat(tray): handle scroll events

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This commit is contained in:
Aleksei Bavshin 2021-06-26 16:33:25 -07:00
parent 1418f96e46
commit 245f7f4b11
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GPG Key ID: 4F071603387A382A
3 changed files with 63 additions and 1 deletions
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6
include/modules/sni/item.hpp
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@ -70,6 +70,12 @@ class Item : public sigc::trackable {
static void onMenuDestroyed(Item* self, GObject* old_menu_pointer);
void makeMenu();
bool handleClick(GdkEventButton* const& /*ev*/);
bool handleScroll(GdkEventScroll* const&);
// smooth scrolling threshold
gdouble scroll_threshold_ = 0;
gdouble distance_scrolled_x_ = 0;
gdouble distance_scrolled_y_ = 0;
Glib::RefPtr<Gio::DBus::Proxy> proxy_;
Glib::RefPtr<Gio::Cancellable> cancellable_;

4
man/waybar-tray.5.scd
View File

@ -16,6 +16,10 @@ Addressed by *tray*
typeof: integer ++
Defines the size of the tray icons.
*smooth-scrolling-threshold*: ++
typeof: double ++
Threshold to be used when scrolling.
*spacing*: ++
typeof: integer ++
Defines the spacing between the tray icons.

54
src/modules/sni/item.cpp
View File

@ -48,9 +48,13 @@ Item::Item(const std::string& bn, const std::string& op, const Json::Value& conf
if (config["icon-size"].isUInt()) {
icon_size = config["icon-size"].asUInt();
}
if (config["smooth-scrolling-threshold"].isNumeric()) {
scroll_threshold_ = config["smooth-scrolling-threshold"].asDouble();
}
event_box.add(image);
event_box.add_events(Gdk::BUTTON_PRESS_MASK);
event_box.add_events(Gdk::BUTTON_PRESS_MASK | Gdk::SCROLL_MASK | Gdk::SMOOTH_SCROLL_MASK);
event_box.signal_button_press_event().connect(sigc::mem_fun(*this, &Item::handleClick));
event_box.signal_scroll_event().connect(sigc::mem_fun(*this, &Item::handleScroll));
cancellable_ = Gio::Cancellable::create();
@ -403,4 +407,52 @@ bool Item::handleClick(GdkEventButton* const& ev) {
return false;
}
bool Item::handleScroll(GdkEventScroll* const& ev) {
int dx = 0, dy = 0;
switch (ev->direction) {
case GDK_SCROLL_UP:
dy = -1;
break;
case GDK_SCROLL_DOWN:
dy = 1;
break;
case GDK_SCROLL_LEFT:
dx = -1;
break;
case GDK_SCROLL_RIGHT:
dx = 1;
break;
case GDK_SCROLL_SMOOTH:
distance_scrolled_x_ += ev->delta_x;
distance_scrolled_y_ += ev->delta_y;
// check against the configured threshold and ensure that the absolute value >= 1
if (distance_scrolled_x_ > scroll_threshold_) {
dx = (int)lround(std::max(distance_scrolled_x_, 1.0));
distance_scrolled_x_ = 0;
} else if (distance_scrolled_x_ < -scroll_threshold_) {
dx = (int)lround(std::min(distance_scrolled_x_, -1.0));
distance_scrolled_x_ = 0;
}
if (distance_scrolled_y_ > scroll_threshold_) {
dy = (int)lround(std::max(distance_scrolled_y_, 1.0));
distance_scrolled_y_ = 0;
} else if (distance_scrolled_y_ < -scroll_threshold_) {
dy = (int)lround(std::min(distance_scrolled_y_, -1.0));
distance_scrolled_y_ = 0;
}
break;
}
if (dx != 0) {
auto parameters = Glib::VariantContainerBase::create_tuple(
{Glib::Variant<int>::create(dx), Glib::Variant<Glib::ustring>::create("horizontal")});
proxy_->call("Scroll", parameters);
}
if (dy != 0) {
auto parameters = Glib::VariantContainerBase::create_tuple(
{Glib::Variant<int>::create(dy), Glib::Variant<Glib::ustring>::create("vertical")});
proxy_->call("Scroll", parameters);
}
return true;
}
} // namespace waybar::modules::SNI