61 lines
2.0 KiB
TypeScript
61 lines
2.0 KiB
TypeScript
// Momentary push button component for the LogicSimulator
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// Copyright (C) 2022 Sascha Nitsch
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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// eslint-disable-next-line @typescript-eslint/no-unused-vars
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class MomentaryPushButton extends BaseComponent {
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private pressed = false;
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private a: WireState = WireState.float;
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private q: WireState = WireState.float;
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constructor(simulator: Simulator, id: string, param: BaseComponentParam) {
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super(simulator, id, param);
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this.pins.set('a', new TriState(this, 0, 0, undefined, { type: 'MomentaryPushButton', id: id + '-a' }));
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this.pins.set('q', new TriState(this, 0, 0, undefined, { type: 'MomentaryPushButton', id: id + '-q' }));
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}
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setup(canvas: SVGElement) {
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super.doSetup('momentarypushbutton', canvas);
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if (this.element) {
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this.element.addEventListener('mousedown', this.activate.bind(this));
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}
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document.addEventListener('mouseup', this.deactivate.bind(this));
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}
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activate(e: MouseEvent) {
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e.stopPropagation();
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this.pressed = true;
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this.simulator.manualtick();
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}
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deactivate(e: MouseEvent) {
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e.stopPropagation();
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if (this.pressed) {
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this.pressed = false;
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this.simulator.manualtick();
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}
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}
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io() {
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this.a = this.getPin('a').getAndReset();
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}
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update(): boolean {
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const oldstate = this.q;
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this.q = this.pressed ? this.a : WireState.float;
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this.getPin('q').setState(this.q);
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return oldstate !== this.q;
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}
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}
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