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Aggregate mouse deltas where possible.

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This commit is contained in:
Thomas Harte 2024-04-06 21:24:21 -04:00
parent ed7cd4b277
commit 69aeca5c0e
1 changed files with 24 additions and 10 deletions
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34
Machines/Acorn/Archimedes/Keyboard.hpp
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@ -134,14 +134,29 @@ struct Keyboard {
state_ = State::ExpectingACK;
break;
}
consider_dequeue();
}
consider_dequeue();
}
void consider_dequeue() {
if(state_ == State::Idle && dequeue_next()) {
state_ = State::ExpectingBACK;
if(state_ == State::Idle) {
// If the key event queue is empty, grab as much mouse motion
// as available.
if(event_queue_.empty()) {
const int x = std::clamp(mouse_x_, -0x3f, 0x3f);
const int y = std::clamp(mouse_y_, -0x3f, 0x3f);
mouse_x_ -= x;
mouse_y_ -= y;
if(x || y) {
enqueue(static_cast<uint8_t>(x) & 0x7f, static_cast<uint8_t>(-y) & 0x7f);
}
}
if(dequeue_next()) {
state_ = State::ExpectingBACK;
}
}
}
@ -201,12 +216,8 @@ private:
Mouse(Keyboard &keyboard): keyboard_(keyboard) {}
void move(int x, int y) override {
// For now: just clamp.
x = std::clamp(x, -0x3f, 0x3f);
y = std::clamp(-y, -0x3f, 0x3f);
keyboard_.enqueue(static_cast<uint8_t>(x) & 0x7f, static_cast<uint8_t>(y) & 0x7f);
keyboard_.consider_dequeue();
keyboard_.mouse_x_ += x;
keyboard_.mouse_y_ += y;
}
int get_number_of_buttons() override {
@ -221,6 +232,9 @@ private:
Keyboard &keyboard_;
};
Mouse mouse_;
int mouse_x_ = 0;
int mouse_y_ = 0;
};
}