mouseevent

问题 Okay so I have a MovieClip called sC and need to write a code where, if you click the button (sC) then sC will dissapear. The function needs to work for multiple buttons. What I tried was sC.addEventListener(MouseEvent.CLICK, clickHandler); function clickHandler(event:MouseEvent):void { var self; self = MovieClip(getChildByName(event.target.name)); self.visible=false; Now when I try this code, it gives me an error when I click sC. It says "cannot access a property or method of a null object

问题 Consider the following demo code: <p id="demo" style="border: 1px solid black;width:300px;height:300px"></p> <script> document.getElementById("demo").onmousedown = function(e){ alert('mousedown'); } document.getElementById("demo").onmouseup = function(e){ alert('mouseup'); } document.getElementById("demo").onclick = function(e){ alert('click'); } </script> Can someone please explain to me why neither the mouseup nor click events get fired? 回答1: When you press your mouse button down, you are

问题 I am creating an ASP.NET/C# website I used the ASP.NET 4.0 Chart control, to draw a Pie chart. Is there a way to create an action for when the user clicks an item (point) with the mouse? For example, an item is clicked, it's color change, or the user gets the item's name or... Thank you for any help Is there also a way to create a mouse over event on an item? 回答1: sure there are some options for interactivity on both ASP.NET and Windows Forms. check here: Interactivity (Chart Controls) there

问题 I want to make a Java program with Swing layout where there is a menu on the left that is expanded when a mouse hovers over the menu area, but auto contracts after your mouse leaves. I am trying to imitate the effect of something like mobile Youtube for Android, or Weebly's editor. Fro those who don't know, both layouts have menus on the left that expand when your mouse hovers over them. Then after your mouse leaves the area, the menu contracts again and is out of view. I was able to create

问题 I have the following code : private void Calculate_Click(object sender, EventArgs e) { if (MessageBox.Show("Please click the object in the image ", "", MessageBoxButtons.OKCancel, MessageBoxIcon.Exclamation, MessageBoxDefaultButton.Button1) == DialogResult.OK) { click_the_object(); } } In the click_the_object() function I want to click a pixel in the picturebox and get it's color. The function for getting the pixel properties is : private Color culoarepixel(Point point) { Bitmap bitmap =

问题 this question is about a tooltip that you can implement very easy in order to track mouse location via it's coordinates the only problem for me is to add the ability to track the coordinates on a specific window after setting it to foreground ... and it's not a form , but a 3rd party application . the code which works for me on the visual studio windows form is ToolTip trackTip; private void TrackCoordinates() { trackTip = new ToolTip(); this.MouseMove += new MouseEventHandler(Form1_MouseMove

问题 Using the list people =["Person 1", "Person 2", "Person 3"] as example, and an empty list called selectedPeople , the following steps must be done: 1) Select one row. Result: "Person 2" added to selectedPeople . List selectedPeople =["Person 2"] 2) Select another row. Result: "Person 3" added to selectedPeople . List selectedPeople =["Person 2", "Person 3"] 3) Select only one of these rows. Result: "Person 2" removed from selectedPeople . List selectedPeople =["Person 3"] Issue : the default

问题 my situation: if the user clicks the delete button(wastebin icon) without a selected layer from my canvas my tooltip should show up and give him advise to select one. everything is fine but the fadeIn and Out wont fire correctly. on first click it doesnt show up but on the second. if u click another times without selected layer the .tooltip suddenly begin to blink uncontrolled... CODE: $('#clearer').click(function() { var activeObject = canvas.getActiveObject(); if(activeObject === undefined

问题 I need some help with Mouse position and screen resolution. I have two applications running on two separate machines: application1 (resolution: 1920 x 1200) captures the mouse location, and then it sends the location values to application2. application2 (resolution: 1280 x 800) receives and sets the Cursor position based on those values. This works just fine, the problem I'm having is, that application1 has a different screen resolution compare to application2, therefore the mouse location

问题 I am trying to implement a input method with Qt Embedded. There is a lookup table for choosing the candidate words for typing. "text input area" to the "lookup table" and the selected word cannot be sent to the "text input area". Dose anyone have any idea to solve this problem? Thanks~ Here I give a simple example: main.cpp #include "InputWidget.h" #include "ButtonWidget.h" #include <QApplication> int main(int argc,char *argv[]) { QApplication app(argc,argv); InputWidget *inputWidget=new