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35 lines
959 B
C++
35 lines
959 B
C++
/*
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* @Author: DI JUNKUN
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* @Date: 2026-10-15
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* Copyright (c) 2026 by DI JUNKUN, All Rights Reserved.
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*/
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#ifndef _POINTER_H_
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#define _POINTER_H_
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#include <array>
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#include <utility>
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namespace crossdesk::harmony::desktop {
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// Preserve each button's last position. Cancellation/focus loss must release
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// every held button, while merely leaving the surface must preserve a drag.
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class PointerState {
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std::array<bool, 3> pressed_{};
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float x_ = 0, y_ = 0;
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public:
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void Update(int kind, int button, float x, float y) {
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x_ = x; y_ = y;
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if (button >= 0 && button < 3 && (kind == 0 || kind == 1)) pressed_[button] = kind == 0;
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}
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unsigned Buttons() const {
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return (pressed_[0] ? 1u : 0u) | (pressed_[1] ? 4u : 0u) | (pressed_[2] ? 2u : 0u);
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}
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template<class Release> void Cancel(Release release) {
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const auto pressed = std::exchange(pressed_, {});
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for (int i = 0; i < 3; ++i) if (pressed[i]) release(i, x_, y_);
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}
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};
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}
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#endif
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