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How to center a (background) image within a div?
...
useful if you need the image horizontally centered but on top vertically : background-position: 50% 0%;
– Sébastien Gicquel
Jan 9 '14 at 10:51
...
Circle-Rectangle collision detection (intersection)
...rect.x & rect.y are the center of the rect. In my world a rect's xy is top/left of rect, and 0,0 is top/left of the screen, so I used: circleDistance_x = abs(circle.x - (rect.x-rect.w/2)); circleDistance_y = abs(circle.y - (rect.y-rect.h/2));
– erco
May 24 ...
How do I create an HTML table with a fixed/frozen left column and a scrollable body?
...
table {
border-collapse: separate;
border-spacing: 0;
border-top: 1px solid grey;
}
td, th {
margin: 0;
border: 1px solid grey;
white-space: nowrap;
border-top-width: 0px;
}
div {
width: 500px;
overflow-x: scroll;
margin-left: 5em;
overflow-y: visible;
...
Adjusting and image Size to fit a div (bootstrap)
... to see an image restricted by height and cut off because it's too wide.
.top1 {
height:390px;
background-color:#FFFFFF;
margin-top:10px;
overflow: hidden;
}
.top1 img {
height:100%;
}
share
|...
Select all 'tr' except the first one
...argin, but not the first, you would do:
#someDiv > input {
margin-top: 20px;
}
#someDiv > input:first-child{
margin-top: 0px;
}
that is, since the inputs are the children, you would place first-child on the input portion of the selector.
...
How do I find a “gap” in running counter with SQL?
... mo.id + 1
)
ORDER BY
id
LIMIT 1
In SQL Server:
SELECT TOP 1
id + 1
FROM mytable mo
WHERE NOT EXISTS
(
SELECT NULL
FROM mytable mi
WHERE mi.id = mo.id + 1
)
ORDER BY
id
In Oracle:
SELECT *
FROM (
S...
Add new item count to icon on button - Android
... <padding
android:left="5dip"
android:right="5dip"
android:top="5dip"
android:bottom="5dip" />
</shape>
You'll have to take a look at how the oval/circle scales with large 3-4 digit numbers, though. If this effect is undesirable, try a rounded rectangle approach like ...
App Inventor 2 中文网原创内容 · App Inventor 2 中文网
...e.clientX - element.offsetLeft; offsetY = e.clientY - element.offsetTop; return false; // 防止文本选中 }; // 鼠标移动时拖动元素 document.onmousemove = function(e) { if (!isDragging) return; element.style.left = (e.clientX - offsetX) + '...
Recommended way of making React component/div draggable
...true,
rel: {
x: e.pageX - pos.left,
y: e.pageY - pos.top
}
})
e.stopPropagation()
e.preventDefault()
},
onMouseUp: function (e) {
this.setState({dragging: false})
e.stopPropagation()
e.preventDefault()
},
onMouseMove: function (e) {
if ...
Calling a parent window function from an iframe
...
You can use
window.top
see the following.
<head>
<script>
function abc() {
alert("sss");
}
</script>
</head>
<body>
<iframe id="myFrame">
<a onclick="window.top.abc()...