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2014/10/16 ¤W¤È 12:09:33
jquery Programming Glossary: transxHow to drag images / objects within Canvas? http://stackoverflow.com/questions/18333936/how-to-drag-images-objects-within-canvas for panning on canvas var isDown false var startCoords var transX transY var last 0 0 canvas.onmousedown function e clearTooltip.. function e var x e.offsetX var y e.offsetY transX parseInt parseInt x parseInt startCoords 0 transY parseInt.. 1 if isDown return context.setTransform 1 0 0 1 transX transY draw1 scaleValue canvas.addEventListener 'click'..
How to drag images / objects within Canvas? http://stackoverflow.com/questions/18333936/how-to-drag-images-objects-within-canvas click function scaleValue 1 draw1 scaleValue false Code for panning on canvas var isDown false var startCoords var transX transY var last 0 0 canvas.onmousedown function e clearTooltip isDown true startCoords e.offsetX last 0 e.offsetY last.. 0 set last coordinates e.offsetY startCoords 1 canvas.onmousemove function e var x e.offsetX var y e.offsetY transX parseInt parseInt x parseInt startCoords 0 transY parseInt parseInt y parseInt startCoords 1 if isDown return context.setTransform.. startCoords 0 transY parseInt parseInt y parseInt startCoords 1 if isDown return context.setTransform 1 0 0 1 transX transY draw1 scaleValue canvas.addEventListener 'click' function e var x e.offsetX var y e.offsetY transX parseInt..
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