Ich versuche, Zieh- und Änderungsgröße Bild zu kombinieren und Bild auf Berührung drehen, und mein Verhalten ist seltsam http://jsfiddle.net/littlechad/Kuaxn/
Mein Code lautet wie folgt:
function update (activeAnchor) {
var group = activeAnchor.getParent();
var topLeft = group.get('.topLeft')[0];
var topRight = group.get('.topRight')[0];
var bottomRight = group.get('.bottomRight')[0];
var bottomLeft = group.get('.bottomLeft')[0];
var image = group.get('.image')[0];
var stage = group.getStage();
var anchorX = activeAnchor.getX();
var anchorY = activeAnchor.getY();
// update anchor positions
switch (activeAnchor.getName()) {
case 'topLeft':
topRight.setY(anchorY);
bottomLeft.setX(anchorX);
break;
case 'topRight':
topLeft.setY(anchorY);
bottomRight.setX(anchorX);
break;
case 'bottomRight':
bottomLeft.setY(anchorY);
topRight.setX(anchorX);
break;
case 'bottomLeft':
bottomRight.setY(anchorY);
topLeft.setX(anchorX);
break;
}
image.setPosition(topLeft.getPosition());
var height = bottomLeft.attrs.y - topLeft.attrs.y;
var width = image.getWidth()*height/image.getHeight();
topRight.attrs.x = topLeft.attrs.x + width
topRight.attrs.y = topLeft.attrs.y;
bottomRight.attrs.x = topLeft.attrs.x + width;
bottomRight.attrs.y = topLeft.attrs.y + height;
if (width && height) {
image.setSize(width, height);
}
}
function rotate (activeAnchor) {
var group = activeAnchor.getParent();
var topLeft = group.get('.topLeft')[0];
var topRight = group.get('.topRight')[0];
var bottomRight = group.get('.bottomRight')[0];
var bottomLeft = group.get('.bottomLeft')[0];
var image = group.get('.image')[0];
var stage = group.getStage();
var pos = stage.getMousePosition();
var xd = 150 - pos.x ;
var yd = 150 - pos.y ;
var theta = Math.atan2(yd, xd);
var degree = theta / (Math.PI / 180) - 45;
var height = bottomLeft.attrs.y - topLeft.attrs.y;
var width = image.getWidth() * height / image.getHeight();
console.log(degree);
console.log(width);
console.log(height);
image.setRotationDeg(degree);
return {
x: image.getAbsolutePosition().x,
y: image.getAbsolutePosition().y
}
}
function addAnchor (group, x, y, name) {
var stage = group.getStage();
var layer = group.getLayer();
var anchor = new Kinetic.Circle({
x: x,
y: y,
stroke: 'transparent',
strokeWidth: 0,
radius: 20,
name: name,
draggable: false,
dragOnTop: false
});
if(name === 'topRight'){
var anchor = new Kinetic.Circle({
x: x,
y: y,
stroke: '#666',
fill: '#ddd',
strokeWidth: 2,
radius: 20,
name: name,
draggable: true,
dragOnTop: false
});
}
anchor.on('dragmove', function () {
update(this);
rotate(this);
layer.draw();
});
anchor.on('mousedown touchstart', function () {
group.setDraggable(false);
this.moveToTop();
});
anchor.on('dragend', function () {
group.setDraggable(true);
layer.draw();
});
group.add(anchor);
}
function initStage () {
var stage = new Kinetic.Stage({
container: 'container',
width: 500,
height: 800
});
var imageGroup = new Kinetic.Group({
x: 150,
y: 150,
draggable: true,
});
var layer = new Kinetic.Layer({
width: 128,
height: 128,
offset: [64, 64]
});
layer.add(imageGroup);
var imgObj = new Image();
var imageInstance = new Kinetic.Image({
x: 0,
y: 0,
image: imgObj,
width: 200,
height: 138,
name: 'image',
});
imgObj.src = 'http://www.html5canvastutorials.com/demos/assets/darth-vader.jpg';
imageGroup.add(imageInstance);
addAnchor(imageGroup, 0, 0, 'topLeft');
addAnchor(imageGroup, 200, 0, 'topRight');
addAnchor(imageGroup, 200, 138, 'bottomRight');
addAnchor(imageGroup, 0, 138, 'bottomLeft');
imageGroup.on('dragstart', function() {
update(this);
rotate(this);
this.moveToTop();
});
stage.add(layer);
stage.draw();
}
function writeMessage (messageLayer, message) {
var context = messageLayer.getContext();
messageLayer.clear();
context.font = '18pt Calibri';
context.fillStyle = 'black';
context.fillText(message, 10, 25);
}
//loadImages(sources, initStage);
initStage();Es scheint, dass das Aktualisieren des Offset das Problem ist, ich habe mehrere Versuche unternommen, den Offset so einzustellen, dass er in der Mitte bleibt, aber ich kann immer noch nicht herausfinden, wie, ich bin wirklich neu in HTML5 und KineticJs, bitte helfe mir dabei.
AKTUALISIEREN:
Das obige Beispiel funktioniert nicht mehr aufgrund des defekten fillColors in neuen Browsern, ich habe das Beispiel aktualisiert, obwohl ich die Lösung dafür noch nicht gefunden habe.
Danke
