You are unable to move the image to the top of the screen after zooming it with CSS

Question

You are unable to move the image to the top of the screen after zooming it with CSS

I implemented an image viewer component with interactive buttons for rotating, zooming in, and zooming out. Upon clicking a button, CSS transform is applied to the image.

However, I encountered an issue where, when zooming the image, it cannot be scrolled all the way to the top or left corner. I attempted to resolve this by adding transform-origin: top left; to the image, which fixed the zoom but caused rotation problems. How can I address this issue effectively?

The code for my implementation can be viewed here: https://codesandbox.io/s/delicate-star-eitj3s?file=/src/app/app.component.ts

EDIT: transform-origin: top left; successfully anchors the image to the top left corner, but I prefer to keep the image centered. Is there a way to fix the scrolling while maintaining the transformation origin at the center of the image?

javascript css

Answer 1

Answer №1

To achieve zoom functionality, we can utilize height and width properties, while for rotation, we can make use of the transform property. By employing display:flex, we can ensure that the image remains centered on the screen. Check out this Demo

.image-viewer {
  display: flex;
  overflow: auto;
  width: 100%;
  height: 100%;
  border: 1px solid black;
}

.image-viewer img {
  margin:auto;
  width: 70%;
  height: 70%;
  transition: 0.3s;
}

.image-controls {
  width: 100%;
  text-align: center;
}

.image-controls button {
  transition: opacity 0.2s;
  opacity: 0.8;

  &:hover {
    opacity: 1;
  }
}

 private transformImage(): void {
    this.renderer.setStyle(
      this.image.nativeElement,
      "transform", `rotate(${this.angle}deg)`
    );
    this.renderer.setStyle(
      this.image.nativeElement,
      "width", `${100 * this.scale}%`
    );

    this.renderer.setStyle(
      this.image.nativeElement,
      "height", `${100 * this.scale}%`
    );
    /*this.image.nativeElement.scrollIntoView({
      behavior: "smooth",
      inline: "center",
      block: "start"
    });*/
  }

Answer 2

To achieve zoom functionality, we can utilize height and width properties, while for rotation, we can make use of the transform property. By employing display:flex, we can ensure that the image remains centered on the screen. Check out this Demo

.image-viewer {
  display: flex;
  overflow: auto;
  width: 100%;
  height: 100%;
  border: 1px solid black;
}

.image-viewer img {
  margin:auto;
  width: 70%;
  height: 70%;
  transition: 0.3s;
}

.image-controls {
  width: 100%;
  text-align: center;
}

.image-controls button {
  transition: opacity 0.2s;
  opacity: 0.8;

  &:hover {
    opacity: 1;
  }
}

 private transformImage(): void {
    this.renderer.setStyle(
      this.image.nativeElement,
      "transform", `rotate(${this.angle}deg)`
    );
    this.renderer.setStyle(
      this.image.nativeElement,
      "width", `${100 * this.scale}%`
    );

    this.renderer.setStyle(
      this.image.nativeElement,
      "height", `${100 * this.scale}%`
    );
    /*this.image.nativeElement.scrollIntoView({
      behavior: "smooth",
      inline: "center",
      block: "start"
    });*/
  }

Answer 3

Answer №2

Indeed, the solution lies in using transform-origin: top left; Make sure to include a condition in your transformImage method as shown below and pass true or false accordingly

private transformImage(zoom): void {
this.renderer.setStyle(
  this.image.nativeElement,
  "transform",
  `rotate(${this.angle}deg) scale(${this.scale})`
);
if (zoom) {
  this.renderer.setStyle(
    this.image.nativeElement,
    "transform-origin",
    `top left`
  );
}

}

Explore more here

Answer 4

Indeed, the solution lies in using transform-origin: top left; Make sure to include a condition in your transformImage method as shown below and pass true or false accordingly

private transformImage(zoom): void {
this.renderer.setStyle(
  this.image.nativeElement,
  "transform",
  `rotate(${this.angle}deg) scale(${this.scale})`
);
if (zoom) {
  this.renderer.setStyle(
    this.image.nativeElement,
    "transform-origin",
    `top left`
  );
}

}

Explore more here

Answer 5

Answer №3

  updateRotation(): void {
    this.angle = this.angle + 90;
    this.transformElement("rotate");
  }

  private transformElement(transformType?: string): void {
    switch (transformType) {
      case "rotate":
        this.renderer.setStyle(
          this.element.nativeElement,
          "tranform-origin",
          "center center"
        );
        break;
      default:
        this.renderer.setStyle(
          this.element.nativeElement,
          "tranform-origin",
          "top left"
        );
        break;
    }

    this.renderer.setStyle(
      this.element.nativeElement,
      "transform",
      `rotate(${this.angle}deg) scale(${this.scale})`
    );
  }

View in codesandbox

Answer 6

  updateRotation(): void {
    this.angle = this.angle + 90;
    this.transformElement("rotate");
  }

  private transformElement(transformType?: string): void {
    switch (transformType) {
      case "rotate":
        this.renderer.setStyle(
          this.element.nativeElement,
          "tranform-origin",
          "center center"
        );
        break;
      default:
        this.renderer.setStyle(
          this.element.nativeElement,
          "tranform-origin",
          "top left"
        );
        break;
    }

    this.renderer.setStyle(
      this.element.nativeElement,
      "transform",
      `rotate(${this.angle}deg) scale(${this.scale})`
    );
  }

View in codesandbox

You are unable to move the image to the top of the screen after zooming it with CSS

Answer №1

Answer №2

Answer №3

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