You can keep text on an image in KineticJS by using the Text object and adding it to the same layer as the image in your KineticJS stage. By positioning the text element relative to the image's x and y coordinates, you can ensure that the text remains on top of the image as it moves or is interacted with in your KineticJS application.
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How to align text on an image in kineticjs?
To align text on an image in KineticJS, you can use the align() method provided by the KineticJS library.
Here is an example code snippet to align text to the center of an image in KineticJS:
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//create a stage var stage = new Kinetic.Stage({ container: 'container', width: 500, height: 500 }); //create a layer var layer = new Kinetic.Layer(); //create an image var imageObj = new Image(); imageObj.onload = function() { var image = new Kinetic.Image({ x: 100, y: 100, image: imageObj, width: 200, height: 200 }); //create text var text = new Kinetic.Text({ x: 100, y: 100, text: 'Hello, World!', fontSize: 20, fontFamily: 'Arial', fill: 'black', align: 'center' //align text to center of image }); //add image and text to layer layer.add(image); layer.add(text); //add layer to stage stage.add(layer); }; imageObj.src = 'path_to_image.jpg'; |
In the code above, we first create a Kinetic.Stage and a Kinetic.Layer. We then create an image and a text object. We use the align property of the text object to align the text to the center of the image. Finally, we add the image and text to the layer and add the layer to the stage.
What is the text attribute in kineticjs?
The text attribute in KineticJS is a property that allows you to set and customize the text content displayed in a text shape or node within a KineticJS canvas. This attribute can be used to define the text content, font family, font size, font style, text color, and alignment of the text within the shape or node. It allows you to create custom text elements and labels within your KineticJS application.
How to move text on an image in kineticjs?
To move text on an image in KineticJS, you can follow these steps:
- Create a new KineticJS stage and layer:
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var stage = new Kinetic.Stage({ container: 'container', width: 800, height: 600 }); var layer = new Kinetic.Layer(); stage.add(layer); |
- Add an image to the layer:
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var imageObj = new Image(); imageObj.onload = function() { var image = new Kinetic.Image({ x: 0, y: 0, image: imageObj, width: 800, height: 600 }); layer.add(image); layer.draw(); }; imageObj.src = 'image.jpg'; |
- Add text to the layer and define its initial position:
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var text = new Kinetic.Text({ x: 100, y: 100, text: 'Hello', fontSize: 30, fontFamily: 'Calibri', fill: 'black' }); layer.add(text); layer.draw(); |
- Use KineticJS animations to move the text across the image:
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var anim = new Kinetic.Animation(function(frame) { var newX = text.getX() + Math.sin(frame.time * 2 * Math.PI / 200) * 2; var newY = text.getY() + Math.cos(frame.time * 2 * Math.PI / 200) * 2; text.setX(newX); text.setY(newY); }, layer); anim.start(); |
By following these steps, you can create an interactive KineticJS animation where a text element moves across an image on the stage.
