drag

问题 I was experiencing the issue raised here and here. My d3 app works perfectly on Chrome via a touch display on Mac, but d3.drag failed when I switched to the Windows production machine running Chrome v.74. I applied the solution .touchable(navigator.maxTouchPoints) , as suggested by the linked pages above. This allowed me to drag the element in Windows Chrome v.74 using the touch screen, but am now getting: UncaughtTypeError: Failed to execute 'elementFromPoint' on 'Document': The provided

问题 I have a horizontal scroll div that is also draggable. The elements which inside this div are links. every time I leave the drag it fire the click and send me to the link. Is there a way that I could prevent the click after leaving the drag but keep it available when not dragging? here's a snippet: const slider = document.querySelector('.wrapper'); let isDown = false; let startX; let scrollLeft; slider.addEventListener('mousedown', (e) => { isDown = true; slider.classList.add('active');

问题 I've an element that can be dragged using native HTML5. It has dragstart, drag, and dragend event listeners assigned to it. In addition, I also have keydown and keyup event listeners assigned to document.body element. When dragging the draggable element, ondrag event will fire as expected. When I press & release any key while not dragging anything, document.body keydown/up events will fire. However, if I keydown/up while performing ondrag, the document.body keydown/up event will not fire. Is

问题 I've an element that can be dragged using native HTML5. It has dragstart, drag, and dragend event listeners assigned to it. In addition, I also have keydown and keyup event listeners assigned to document.body element. When dragging the draggable element, ondrag event will fire as expected. When I press & release any key while not dragging anything, document.body keydown/up events will fire. However, if I keydown/up while performing ondrag, the document.body keydown/up event will not fire. Is

问题 html is <div id="test" draggable='true'></div> and I can drag this div,but when I drop the element, there is a animation that element back to it's origin position how to disable this animate? I use preventDefault() in dragend event, it not working? My English is not vert good ,thank you very much enter image description here 回答1: In order to prevent the animation, you need the drop event to fire. For the drop event to fire, you need to call preventDefault() in the handler for dragover .

问题 html is <div id="test" draggable='true'></div> and I can drag this div,but when I drop the element, there is a animation that element back to it's origin position how to disable this animate? I use preventDefault() in dragend event, it not working? My English is not vert good ,thank you very much enter image description here 回答1: In order to prevent the animation, you need the drop event to fire. For the drop event to fire, you need to call preventDefault() in the handler for dragover .

问题 I'm making a Letter Drag n Drop game (kinda like Guess the Brand) where you have an image and you have to drag the letters into layouts to form the correct answer. At the top, I have Four layouts (layoutAnsw A to D), and in the bottom I have Four buttons (btnTop A to D) I have the OnTouchListener and OnDragListener working fine, except one single thing. What happens when I have more than one similar character (letter)? For example in this image: As you can see, I have to "A" letters that need

问题 I want to allow user to drag UIView inside a limited area of its super view. Trying the following simple code: func handlePanForImage(recognizer: UIPanGestureRecognizer) { if let myView = recognizer.view { switch (recognizer.state) { case .Changed: let translation = recognizer.translationInView(self) if insideDraggableArea(myView.center) { myView.center = CGPoint(x:recognizer.view!.center.x + translation.x, y:recognizer.view!.center.y + translation.y) recognizer.setTranslation(CGPointZero,

问题 I am in a tricky situation, hope you can help me with it. I have few views (TextViews), horizontally placed one after another in a linear layout. When I press on textview1, drag my finger to any other textview and release touch, I want to be able to get the view(textview) on which the finger was lifted. I went over the TouchListener api, it says that every event starts with a ACTION_DOWN event action. Since other textviews won't fire that event, how can I get the reference to the textViews on

问题 I want to be able to drag a divider up and down to resize the divs above and below the divider on a fixed page height. These divs could be in a table, although they need not be. In short, I would like to be able to emulate what happens on the jsFiddle site, although I only need the vertical resize. jsFiddle have used mooTools, but I want to do it with jQuery. One important complication: I won't know the size of the div above the divider until it is actually built dynamically, so I can't just