click | 易学教程

What is the best way to simulate a Click with MouseUp & MouseDown events or otherwise?

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问题 In WPF most controls have MouseUp and MouseDown events (and the mouse-button-specific variations) but not a simple Click event that can be used right away. If you want to have a click-like behaviour using those events you need to handle both which i consider to be a bit of a pain. The obvious problem is that you cannot simply omit the MouseDown event because if your click is started on another control and it is released over the control that only handles MouseUp your supposed click will fire

Click event called twice on touchend in iPad

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问题 I am using jquery animate for the slide. I have an arrow at the end of the slide and given the click event on that arrow. The working of it is to move one item inside the silde on click and move the entire silde on mousedown. This is working fine in desktop but in iPad two items are coming inside the slide at a time on click. I am not understanding why the click event is called twice in iPad. The sample code for the click is : $(\'#next_item\').bind(\'mousedown touchstart MozTouchDown\'

Detect if user clicks inside a circle

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问题 How can I detect when the user clicks inside the red bubble? It should not be like a square field. The mouse must be really inside the circle: Here\'s the code: <canvas id=\"canvas\" width=\"1000\" height=\"500\"></canvas> <script> var canvas = document.getElementById(\"canvas\") var ctx = canvas.getContext(\"2d\") var w = canvas.width var h = canvas.height var bubble = { x: w / 2, y: h / 2, r: 30, } window.onmousedown = function(e) { x = e.pageX - canvas.getBoundingClientRect().left y = e

jQuery, checkboxes and .is(“:checked”)

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问题 When I bind a function to a checkbox element like: $(\"#myCheckbox\").click( function() { alert($(this).is(\":checked\")); }); The checkbox changes its checked attribute before the event is triggered, this is the normal behavior, and gives an inverse result. However, when I do: $(\"#myCheckbox\").click(); The checkbox changes it checked attribute after the event is triggered. My question is, is there a way to trigger the click event from jQuery like a normal click would do (first scenario)?

Play sound on button click android

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问题 How do I get a button to play a sound from raw when click? I just created a button with id button1 , but whatever code I write, all is wrong. import android.media.MediaPlayer; public class BasicScreenActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_basic_screen); } Button one = (Button)this.findViewById(R.id.button1); MediaPlayer = mp; mp = MediaPlayer.create(this, R.raw.soho); zero

Custom UITableViewCell selection style?

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问题 When I click on my UITableViewCell , the background part (the areas that my background image doesn\'t cover) turns blue when I click on the cell. Also, all of the UILabel s on the cell turn to white when it is clicked which is what I want. However what I do not want is the blue background when I click it but if I do selectionstylenone , then I lose the highlighted colours for the UILabel s in the cell. So is there any way to just get rid of the blue background when the cell is clicked but to

How to add click event to an element?

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问题 I would like to add a click event in plain JavaScript (without using jQuery) to an element like this, so I don\'t have an id but a class: <a href=\"http://example.com/share\" class=\"MyClass\">Yummy</a> 回答1: If you don't have an id and don't have any selector library and you want it to work in older browsers, then it takes a bit more work. If you can put an id on it, it's quite simple. If not, it takes more code: var links = document.getElementsByClassName("MyClass"); links[0].onclick =

Jquery: mousedown effect (while left click is held down)

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问题 I need a function that executes a function while a button is pressed and stops executing when the button is let go $(\'#button\').--while being held down--(function() { //execute continuously }); 回答1: I believe something like this would work: var timeout, clicker = $('#clicker'); clicker.mousedown(function(){ timeout = setInterval(function(){ // Do something continuously }, 500); return false; }); $(document).mouseup(function(){ clearInterval(timeout); return false; }); See this demo: http:/

$(document).on(“click”… not working?

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问题 Is there a well-known mistake I could be making here? I\'ve got a script that\'s using .on() because an element is dynamically generated, and it isn\'t working. Just to test it out, I replaced the selector with the dynamic element\'s wrap, which is static, and it still didn\'t work! When I switched to plain old .click for the wrap it worked, though. (This just won\'t work for the dynamic element obviously, the one that matters.) This works: $(\"#test-element\").click(function() { alert(\

Android Fragment onClick button Method

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I'm trying to invoke the method in my onClick (View v) XML, but does not work with Fragment. This is the error. 01-17 12:38:36.840: E/AndroidRuntime(4171): java.lang.IllegalStateException: Could not find a method insertIntoDb(View) in the activity class main.MainActivity for onClick handler on view class android.widget.Button with id 'btn_conferma' MainActivity.java public void insertIntoDb(View v) { ... } xml code <Button android:id="@id/btn_conferma" style="?android:attr/borderlessButtonStyle" android:layout_width="0.0dip" android:layout_height="45dp" android:layout_marginLeft="2dp" android