Curved Edges Ensure Non-Interactive Elements

element, there is a query about utilizing a color wheel from a repository on GitHub. The goal is to disable any actions when clicking outside of the canvas border radius in this color wheel. Various steps need to be taken to prevent unwanted outcomes: - Stopping the cursor from changing into a pointer - Ensuring that colors and the dragger remain static by not allowing them to move or change, possibly by avoiding calling redraw() The attempt involved adding debugging logic within the redraw() function at line 97, specifically within the "if statement" checking d > radiusSquared, to track the execution of conditions for implementing preventive measures. An issue arises where even after starting to drag the dragger inside the canvas and moving outwards, the console still shows the debug string. This might require further clarification for better understanding. The main question involves how to halt any changes from occurring when the cursor moves outside the canvas's border radius, regardless of whether the dragging action began inside or outside the canvas. To explore the scenario in detail with working code snippets, check out the JSFiddle linked in the text.

Answer №1

To ensure the color and pointer remain constant:

if (d > radiusSquared) {
  currentX = radius * math.cos(theta);
  currentY = radius * math.sin(theta);
  theta = atan2(currentY, currentX);
  d = currentX * currentX + currentY * currentY;
}else{
  label.textContent = b.style.background = hsvToRgb(
    (theta + PI) / PI2,
    sqrt(d) / radius,
    input.value / oneHundred 
  )[3];
  a.putImageData(imageData, 0, 0);
  dragger.style.left = (~~currentX + radiusPlusOffset) + 'px';
  dragger.style.top = (~~currentY + radiusPlusOffset) + 'px';
}

JSFiddle

Regarding the cursor, one solution is to capture mouseover events on the canvas and manually adjust the cursor position.

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