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2014/10/16 ¤W¤È 12:08:59
jquery Programming Glossary: startcoordsHow to drag images / objects within Canvas? http://stackoverflow.com/questions/18333936/how-to-drag-images-objects-within-canvas false Code for panning on canvas var isDown false var startCoords var transX transY var last 0 0 canvas.onmousedown function e.. 0 canvas.onmousedown function e clearTooltip isDown true startCoords e.offsetX last 0 e.offsetY last 1 canvas.onmouseup function.. canvas.onmouseup function e isDown false last e.offsetX startCoords 0 set last coordinates e.offsetY startCoords 1 canvas.onmousemove..
HTML5 Panning based on Mouse Movement http://stackoverflow.com/questions/7096921/html5-panning-based-on-mouse-movement VWn6t 3 . var isDown false whether mouse is pressed var startCoords 'grab' coordinates when pressing mouse var last 0 0 previous.. of mouse release canvas.onmousedown function e isDown true startCoords e.offsetX last 0 set start coordinates e.offsetY last 1 canvas.onmouseup.. 1 canvas.onmouseup function e isDown false last e.offsetX startCoords 0 set last coordinates e.offsetY startCoords 1 canvas.onmousemove..
How to drag images / objects within Canvas? http://stackoverflow.com/questions/18333936/how-to-drag-images-objects-within-canvas .addEventListener 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.. 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 1 canvas.onmouseup function e isDown false last e.offsetX startCoords 0 set last coordinates.. true startCoords e.offsetX last 0 e.offsetY last 1 canvas.onmouseup function e isDown false last e.offsetX startCoords 0 set last coordinates e.offsetY startCoords 1 canvas.onmousemove function e var x e.offsetX var y e.offsetY transX parseInt..
HTML5 Panning based on Mouse Movement http://stackoverflow.com/questions/7096921/html5-panning-based-on-mouse-movement tried to update your fiddle a little http jsfiddle.net pimvdb VWn6t 3 . var isDown false whether mouse is pressed var startCoords 'grab' coordinates when pressing mouse var last 0 0 previous coordinates of mouse release canvas.onmousedown function e.. when pressing mouse var last 0 0 previous coordinates of mouse release canvas.onmousedown function e isDown true startCoords e.offsetX last 0 set start coordinates e.offsetY last 1 canvas.onmouseup function e isDown false last e.offsetX startCoords.. e.offsetX last 0 set start coordinates e.offsetY last 1 canvas.onmouseup function e isDown false last e.offsetX startCoords 0 set last coordinates e.offsetY startCoords 1 canvas.onmousemove function e if isDown return don't pan if mouse is not..
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