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rgantzosrgantzos
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Rotate gradients
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‎features/features.json‎

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[
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{
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"version": 2,
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"id": "rotate-gradient",
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"versionAdded": "v4.0.0"
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},
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{
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"version": 2,
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"id": "change-monitor-opacity",

‎features/rotate-gradient/data.json‎

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{
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"title": "Rotate Gradients",
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"description": "Allows you to rotate gradients in any direction in the costume editor. Works in both the vector and bitmap editors.",
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"credits": [
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{
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"url": "https://scratch.mit.edu/users/rgantzos/",
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"username": "rgantzos"
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}
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],
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"type": ["Editor"],
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"dynamic": true,
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"scripts": [{ "file": "script.js", "runOn": "/projects/*" }],
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"styles": [{ "file": "style.css", "runOn": "/projects/*" }]
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}

‎features/rotate-gradient/script.js‎

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export default async function ({ feature, console }) {
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let lastRotation = 0
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feature.page.waitForElements(
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"div[class^='color-picker_gradient-picker-row_'][class*='color-picker_gradient-swatches-row_']",
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function (row) {
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let body = document.querySelector(".Popover-body");
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if (feature.traps.paint().selectedItems.length !== 1) return;
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if (feature.traps.paint().selectedItems[0].fillColor._components[0].radial) return;
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if (!document.querySelector("div[class^='color-picker_gradient-picker-row_'][class*='color-picker_gradient-swatches-row_']")) return;
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if (body.querySelector(".ste-direction-slider")) return;
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let div = document.createElement("div");
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div.className = "ste-direction-slider";
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feature.self.hideOnDisable(div);
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let data = document.createElement("div");
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data.className = "color-picker_row-header_173LQ";
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div.appendChild(data);
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let name = document.createElement("span");
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name.className = "color-picker_label-name_17igY";
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name.textContent = "Direction";
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let value = document.createElement("span");
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value.className = "color-picker_label-readout_9vjb2";
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value.textContent = "0deg";
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data.appendChild(name);
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data.appendChild(value);
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let slider = document.createElement("div");
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slider.className =
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"ste-direction-slider-checkered slider_container_o2aIb slider_last_10jvO";
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div.appendChild(slider);
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let sliderBg = document.createElement("div");
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sliderBg.style.background = `linear-gradient(270deg, ${
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feature.traps.paint().selectedItems[0]?.fillColor?._canvasStyle
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} 0%, rgba(0, 0, 0, 0) 100%)`;
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sliderBg.className = "ste-direction-background";
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slider.appendChild(sliderBg);
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let handle = document.createElement("div");
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handleSlider(handle, value);
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handle.className = "ste-direction-handle slider_handle_3f0xk";
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handle.style.left = "124px";
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if (feature.traps.paint().selectedItems[0]?.opacity) {
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handle.style.left = "0px";
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}
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slider.appendChild(handle);
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body.firstChild.insertBefore(div, body.querySelector("div[class^='color-picker_row-header_']").parentElement);
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lastRotation = 0
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}
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);
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feature.redux.subscribe(function() {
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if (!document.querySelector("div[class^='paint-editor_editor-container_']")) return;
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if (!document.querySelector("div[class^='color-picker_gradient-picker-row_'][class*='color-picker_gradient-swatches-row_']") || feature.traps.paint().selectedItems[0]?.fillColor._components[0].radial || feature.traps.paint().selectedItems.length !== 1) {
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document.querySelector(".ste-direction-slider")?.remove()
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}
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})
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const rotateColor = function (amount) {
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let data = rotatePoints(
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feature.traps.paint().selectedItems[0].fillColor
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._components[1],
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feature.traps.paint().selectedItems[0].fillColor
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._components[2],
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amount
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);
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feature.traps.paint().selectedItems[0].fillColor._components[1].x =
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data.finalP1.x;
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feature.traps.paint().selectedItems[0].fillColor._components[1].y =
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data.finalP1.y;
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feature.traps.paint().selectedItems[0].fillColor._components[2].x =
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data.finalP2.x;
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feature.traps.paint().selectedItems[0].fillColor._components[2].y =
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data.finalP2.y;
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};
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function rotatePoints(p1, p2, angle) {
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// Calculate the midpoint
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const midpoint = {
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x: (p1.x + p2.x) / 2,
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y: (p1.y + p2.y) / 2,
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};
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const translatedP1 = {
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x: p1.x - midpoint.x,
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y: p1.y - midpoint.y,
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};
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const translatedP2 = {
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x: p2.x - midpoint.x,
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y: p2.y - midpoint.y,
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};
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const radians = angle * (Math.PI / 180);
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const rotatedP1 = {
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x:
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translatedP1.x * Math.cos(radians) - translatedP1.y * Math.sin(radians),
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y:
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translatedP1.x * Math.sin(radians) + translatedP1.y * Math.cos(radians),
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};
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const rotatedP2 = {
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x:
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translatedP2.x * Math.cos(radians) - translatedP2.y * Math.sin(radians),
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y:
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translatedP2.x * Math.sin(radians) + translatedP2.y * Math.cos(radians),
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};
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const finalP1 = {
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x: rotatedP1.x + midpoint.x,
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y: rotatedP1.y + midpoint.y,
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};
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const finalP2 = {
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x: rotatedP2.x + midpoint.x,
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y: rotatedP2.y + midpoint.y,
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};
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return { finalP1, finalP2 };
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}
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function handleSlider(handle, value) {
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let isDragging = false;
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handle.addEventListener("mousedown", (e) => {
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isDragging = true;
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const initialX = e.clientX;
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const handleLeft = parseInt(handle.style.left) || 0;
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document.addEventListener("mousemove", onMouseMove);
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document.addEventListener("mouseup", onMouseUp);
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function onMouseMove(e) {
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if (isDragging) {
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const offsetX = e.clientX - initialX;
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let newLeft = handleLeft + offsetX;
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newLeft = Math.max(0, Math.min(124, newLeft));
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rotateColor(Math.floor((newLeft / 124) * 360) - lastRotation)
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update()
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lastRotation = Math.floor((newLeft / 124) * 360)
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value.textContent =
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Math.floor((newLeft / 124) * 360).toString() + "deg";
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handle.style.left = newLeft + "px";
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}
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}
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function onMouseUp() {
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isDragging = false;
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document.removeEventListener("mousemove", onMouseMove);
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document.removeEventListener("mouseup", onMouseUp);
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}
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});
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handle.addEventListener("touchstart", (e) => {
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isDragging = true;
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const initialX = e.touches[0].clientX;
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const handleLeft = parseInt(handle.style.left) || 0;
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handle.addEventListener("touchmove", onTouchMove);
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handle.addEventListener("touchend", onTouchEnd);
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function onTouchMove(e) {
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if (isDragging) {
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const offsetX = e.touches[0].clientX - initialX;
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let newLeft = handleLeft + offsetX;
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newLeft = Math.max(0, Math.min(124, newLeft));
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rotateColor(Math.floor((newLeft / 124) * 360) - lastRotation)
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update()
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lastRotation = Math.floor((newLeft / 124) * 360)
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value.textContent =
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Math.floor((newLeft / 124) * 360).toString() + "deg";
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handle.style.left = newLeft + "px";
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}
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}
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function onTouchEnd() {
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isDragging = false;
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handle.removeEventListener("touchmove", onTouchMove);
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handle.removeEventListener("touchend", onTouchEnd);
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}
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});
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}
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function update() {
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feature.traps.getPaper().tool.onUpdateImage()
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}
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}

‎features/rotate-gradient/style.css‎

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.ste-direction-slider {
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padding-top: 0.2rem;
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margin-bottom: 20px;
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}
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.ste-direction-slider-checkered {
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background-color: #f6f6f6;
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background-image: linear-gradient(
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to right,
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#c5ccd6,
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#c5ccd6 1px,
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transparent 1px,
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transparent 1.5px
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);
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background-size: 3px 100%;
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background-position: 0 0, 10px 10px;
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}
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.ste-direction-background {
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content: "";
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position: absolute;
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top: 0;
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left: 0;
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width: 100%;
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height: 100%;
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border-radius: 11px;
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}

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