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#include "cru/ui/ClickDetector.hpp"
#include "cru/common/Logger.hpp"
#include <optional>
namespace cru::ui {
ClickDetector::ClickDetector(Control* control) {
Expects(control);
control_ = control;
event_rovoker_guards_.push_back(
EventRevokerGuard(control->MouseEnterEvent()->Direct()->AddHandler(
[this](event::MouseEventArgs&) {
if (this->enable_) {
if (this->state_ == ClickState::PressInactive) {
if ((this->button_ & this->trigger_button_)) {
this->SetState(ClickState::Press);
}
} else {
this->SetState(ClickState::Hover);
}
}
})));
event_rovoker_guards_.push_back(
EventRevokerGuard(control->MouseLeaveEvent()->Direct()->AddHandler(
[this](event::MouseEventArgs&) {
if (this->enable_) {
if (this->state_ == ClickState::Press) {
if ((this->button_ & this->trigger_button_)) {
this->SetState(ClickState::PressInactive);
}
} else {
this->SetState(ClickState::None);
}
}
})));
event_rovoker_guards_.push_back(
EventRevokerGuard(control->MouseDownEvent()->Direct()->AddHandler(
[this](event::MouseButtonEventArgs& args) {
const auto button = args.GetButton();
if (this->enable_ && (button & this->trigger_button_) &&
this->state_ == ClickState::Hover) {
if (!this->control_->CaptureMouse()) {
log::TagDebug(log_tag,
u"Failed to capture mouse when begin click.");
return;
}
this->down_point_ = args.GetPoint();
this->button_ = button;
this->SetState(ClickState::Press);
}
})));
event_rovoker_guards_.push_back(
EventRevokerGuard(control->MouseUpEvent()->Direct()->AddHandler(
[this](event::MouseButtonEventArgs& args) {
const auto button = args.GetButton();
if (this->enable_ && (button & this->trigger_button_) &&
button == button_) {
if (this->state_ == ClickState::Press) {
this->SetState(ClickState::Hover);
this->event_.Raise(ClickEventArgs{this->control_,
this->down_point_,
args.GetPoint(), button});
this->control_->ReleaseMouse();
} else if (this->state_ == ClickState::PressInactive) {
this->SetState(ClickState::None);
this->control_->ReleaseMouse();
}
}
})));
} // namespace cru::ui
void ClickDetector::SetEnabled(bool enable) {
if (enable == enable_) {
return;
}
enable_ = enable;
if (enable) {
SetState(control_->IsMouseOver() ? ClickState::Hover : ClickState::None);
} else {
if (state_ == ClickState::Press || state_ == ClickState::PressInactive) {
SetState(ClickState::None);
control_->ReleaseMouse();
} else if (state_ == ClickState::Hover) {
SetState(ClickState::None);
}
}
}
void ClickDetector::SetTriggerButton(MouseButton trigger_button) {
if (trigger_button == trigger_button_) {
return;
}
trigger_button_ = trigger_button;
if ((state_ == ClickState::Press || state_ == ClickState::PressInactive) &&
!(button_ & trigger_button)) {
SetState(control_->IsMouseOver() ? ClickState::Hover : ClickState::None);
control_->ReleaseMouse();
}
}
void ClickDetector::SetState(ClickState state) {
#ifdef CRU_DEBUG
auto to_string = [](ClickState state) -> std::u16string_view {
switch (state) {
case ClickState::None:
return u"None";
case ClickState::Hover:
return u"Hover";
case ClickState::Press:
return u"Press";
case ClickState::PressInactive:
return u"PressInvactive";
default:
UnreachableCode();
}
};
log::TagDebug(log_tag, u"Click state changed, new state: {}.",
to_string(state));
#endif
state_ = state;
state_change_event_.Raise(state);
}
} // namespace cru::ui
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