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@ -46,7 +46,9 @@ export default function MiddlePane(props) {
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y: 0,
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click_x: 0,
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click_y: 0,
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hovering: false
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hovering: false,
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down: false,
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touches: [],
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});
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createEffect(() => {
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@ -239,10 +241,18 @@ export default function MiddlePane(props) {
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function resize_cb() {
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if (!canvas.element) return;
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setCanvas((obj) => {
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let dpr = window.devicePixelRatio ?? 1;
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let width = Math.round(container.clientWidth * dpr);
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let height = Math.round(container.clientHeight * dpr);
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obj.element.style.width = `${width / dpr}px`;
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obj.element.style.height = `${height / dpr}px`;
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return {
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...obj,
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width: obj.element.width = canvas.element.clientWidth,
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height: obj.element.height = canvas.element.clientHeight,
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width: obj.element.width = width,
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height: obj.element.height = height,
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};
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});
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}
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@ -251,13 +261,13 @@ export default function MiddlePane(props) {
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function set_resize() {
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setTimeout(() => {
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resize_listener.observe(canvas.element);
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resize_listener.observe(container);
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}, 0);
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}
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function remove_resize() {
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setTimeout(() => {
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resize_listener.unobserve(canvas.element);
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resize_listener.unobserve(container);
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}, 0);
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}
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@ -291,8 +301,9 @@ export default function MiddlePane(props) {
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onMount={() => {mounted = true}}
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onCleanup={() => {mounted = false}}
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onMouseDown={(evt) => {
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let mouse_x = evt.clientX - container.offsetLeft;
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let mouse_y = evt.clientY - container.offsetTop;
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let dpr = window.devicePixelRatio ?? 1;
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let mouse_x = (evt.clientX - container.offsetLeft) * dpr;
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let mouse_y = (evt.clientY - container.offsetTop) * dpr;
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setMouse((mouse) => {
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return {
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...mouse,
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@ -306,21 +317,23 @@ export default function MiddlePane(props) {
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});
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}}
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onMouseMove={(evt) => {
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let dpr = window.devicePixelRatio ?? 1;
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setMouse("hovering", true);
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if (mouse.down) {
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// TODO: numerically stable solution
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setView("cx", view.cx + (evt.clientX - container.offsetLeft) - mouse.x);
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setView("cy", view.cy + (evt.clientY - container.offsetTop) - mouse.y);
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setView("cx", view.cx + (evt.clientX - container.offsetLeft) * dpr - mouse.x);
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setView("cy", view.cy + (evt.clientY - container.offsetTop) * dpr - mouse.y);
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}
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setMouse("x", evt.clientX - container.offsetLeft);
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setMouse("y", evt.clientY - container.offsetTop);
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setMouse("x", (evt.clientX - container.offsetLeft) * dpr);
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setMouse("y", (evt.clientY - container.offsetTop) * dpr);
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}}
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onMouseUp={(evt) => {
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let dpr = window.devicePixelRatio ?? 1;
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setMouse("down", false);
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setMouse("x", evt.clientX - container.offsetLeft);
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setMouse("y", evt.clientY - container.offsetTop);
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setMouse("x", (evt.clientX - container.offsetLeft) * dpr);
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setMouse("y", (evt.clientY - container.offsetTop) * dpr);
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let dist = Math.sqrt((mouse.x - mouse.click_x) ** 2 + (mouse.y - mouse.click_y) ** 2);
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if (dist < 10) {
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@ -335,9 +348,92 @@ export default function MiddlePane(props) {
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setMouse("down", false);
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setMouse("hovering", false);
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}}
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onTouchStart={(evt) => {
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let dpr = window.devicePixelRatio ?? 1;
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setMouse("hovering", false);
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setMouse("touches", [...evt.touches].map(touch => ({
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x: (touch.clientX - container.offsetLeft) * dpr,
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y: (touch.clientY - container.offsetTop) * dpr,
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identifier: touch.identifier,
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})));
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if (evt.touches.length === 1) {
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setMouse("down", true);
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setMouse("x", mouse.touches[0].x);
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setMouse("y", mouse.touches[0].y);
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setMouse("click_x", mouse.touches[0].x);
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setMouse("click_y", mouse.touches[0].y);
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} else {
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setMouse("down", false);
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}
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}}
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onTouchEnd={(evt) => {
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let identifiers = [...evt.changedTouches].map(t => t.identifier);
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setMouse("touches", (arr) => {
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return arr.filter(touch => !identifiers.includes(touch.identifier));
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});
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if (evt.touches.length === 1) {
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setMouse("down", true);
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setMouse("x", mouse.touches[0].x);
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setMouse("y", mouse.touches[0].y);
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setMouse("click_x", mouse.touches[0].x);
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setMouse("click_y", mouse.touches[0].y);
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} else {
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setMouse("down", false);
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}
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}}
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oncapture:touchmove={(evt) => {
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evt.preventDefault();
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let dpr = window.devicePixelRatio ?? 1;
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let touches = [...evt.touches].map(touch => ({
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x: (touch.clientX - container.offsetLeft) * dpr,
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y: (touch.clientY - container.offsetTop) * dpr,
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identifier: touch.identifier,
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}));
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if (evt.touches.length === 1) {
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let mouse_x = (evt.touches[0].clientX - container.offsetLeft) * dpr;
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let mouse_y = (evt.touches[0].clientY - container.offsetTop) * dpr;
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setView("cx", view.cx + mouse_x - mouse.x);
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setView("cy", view.cy + mouse_y - mouse.y);
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setMouse("x", mouse_x);
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setMouse("y", mouse_y);
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} else if (evt.touches.length === 2) {
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let mx = (touches[0].x + touches[1].x) / 2;
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let my = (touches[0].y + touches[1].y) / 2;
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let dx = mx - (mouse.touches[0].x + mouse.touches[1].x) / 2;
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let dy = my - (mouse.touches[0].y + mouse.touches[1].y) / 2;
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let prev_dist = Math.sqrt(
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(mouse.touches[0].x - mouse.touches[1].x) ** 2
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+ (mouse.touches[0].y - mouse.touches[1].y) ** 2
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);
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let dist = Math.sqrt(
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(touches[0].x - touches[1].x) ** 2 + (touches[0].y - touches[1].y) ** 2
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);
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let old_zoom = view.zoom;
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setView("zoom", Math.min(Math.max(view.zoom + Math.log2(dist / prev_dist), 0.0), 4.0));
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let delta = Math.ceil(Math.pow(2, view.zoom)) / Math.ceil(Math.pow(2, old_zoom));
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mx -= canvas.width / 2;
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my -= canvas.height / 2;
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setView("cx", (view.cx - mx) * delta + mx + dx);
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setView("cy", (view.cy - my) * delta + my + dy);
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}
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setMouse("touches", touches);
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}}
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onWheel={(evt) => {
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let old_zoom = view.zoom;
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let zoom = view.zoom + event.deltaY * ZOOM_STRENGTH;
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let zoom = view.zoom + evt.deltaY * ZOOM_STRENGTH;
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zoom = Math.min(Math.max(zoom, 0.0), 4.0);
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setView("zoom", zoom);
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@ -356,12 +452,13 @@ export default function MiddlePane(props) {
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setSettings("selected", getHovered());
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}}
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onDragOver={(evt) => {
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let dpr = window.devicePixelRatio ?? 1;
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evt.preventDefault();
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container.classList.add(styles.dragging);
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setMouse("hovering", true);
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setMouse("x", evt.clientX - container.offsetLeft);
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setMouse("y", evt.clientY - container.offsetTop);
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setMouse("x", (evt.clientX - container.offsetLeft) * dpr);
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setMouse("y", (evt.clientY - container.offsetTop) * dpr);
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}}
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onDragLeave={(evt) => {
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setMouse("hovering", false);
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