[DIV+CSS] set the screen capture Part 1 (div截取屏幕)
使用下面的代码来获取屏幕。用DIV加CSS 来控制。 使用mousemove来获取移动的时候DIV的变化,
效果图如下:
使用5个DIV来组成实现截图目的第一部分,现在只是实现了选择的第一部分。
HTML 部分
1 <div id="bg" class="divShawd" onmousedown="mousedown()" onmouseup="mouseup()" onmousemove="mousemove()" ondblclick="confirmCapture()"> 2 </div> 3 <div id="divTop" class="divShawdArea"></div> 4 <div id="divLeft" class="divShawdArea"></div> 5 <div id="divRight" class="divShawdArea"></div> 6 <div id="divBottom" class="divShawdArea"></div>
CSS 部分
.divShawdArea {
cursor: crosshair;
position: absolute;
display: none;
background-color: black;
z-index: 1000;
-moz-opacity: 0.7;
opacity: .70;
filter: alpha(opacity=70);
}
.divShawd {
cursor: crosshair;
display: none;
position: absolute;
top: 0%;
left: 0%;
width: 100%;
height: 100%;
background-color: black;
z-index: 1001;
-moz-opacity: 0.0;
opacity: .0;
filter: alpha(opacity=0);
}
JAVASCRIPT 部分
<script type="text/javascript"> var moveCondition = false; var move = false; var moveArea = false; var moveAreaCondition = false; function showdiv() { //document.getElementById("bg").style.display = "block"; $("#bg").show(); $("#bg").css("cursor", "crosshair"); moveCondition = true; } function hidediv() { moveCondition = false; //document.getElementById("bg").style.display = ‘none‘; $("#bg").hide(); $("#divTop").hide(); $("#divLeft").hide(); $("#divRight").hide(); $("#divBottom").hide(); } var origX = 0, compX = 0, origAreaX = 0, trimX = 0; var origY = 0, compY = 0, origAreaY = 0, trimY = 0; function mousedown() { if (moveCondition) { $("#divTop").show(); $("#divLeft").show(); $("#divRight").show(); $("#divBottom").show(); // $("#show").show(); move = moveCondition; origX = event.clientX; origY = event.clientY; // $("#show").css("left", event.clientX).css("top", event.clientY); // $("#show").css("width", "1").css("height", "1"); showdivArea(origX, origY, origX + 1, origY + 1); } else if (moveAreaCondition) { moveArea = true; origAreaX = event.clientX; origAreaY = event.clientY; } } function mousemove() { if (move == true) { showdivArea(origX, origY, event.clientX, event.clientY); } else if (moveArea) { trimX = event.clientX - origAreaX; trimY = event.clientY - origAreaY; //$("#divBottom").html = "X1:" + origX + ",Y1:" + origY + ",X2:" + compX + ",Y2:" + compY; showdivArea(origX + trimX, origY + trimY, compX + trimX, compY + trimY); } } function mouseup() { move = false; moveCondition = false; moveAreaCondition = true; $("#bg").css("cursor", "pointer"); compX = event.clientX; compY = event.clientY; if (moveArea) { moveArea = false; moveAreaCondition = false; origX += trimX; origY += trimY; compX += trimX; compY += trimY; } } function confirmCapture() { alert("select area is : (X1:" + origX + ",Y1:" + origY + ",X2:" + compX + ",Y2:" + compY + ")"); $("#bg").css("cursor", "default"); hidediv(); } function showdivArea(oX, oY, cX, cY) { if (oX > cX) { var temp = oX; oX = cX; cX = temp; } if (oY > cY) { var temp = oY; oY = cY; cY = temp; } //$("#show").css("width", compX - origX).css("height", compY - origY); $("#divTop").css("left", "0").css("top", "0"); $("#divTop").css("width", "100%").css("height", oY); $("#divLeft").css("left", "0").css("top", oY); $("#divLeft").css("width", oX).css("height", cY - oY); $("#divRight").css("left", cX).css("top", oY); $("#divRight").css("width", screen.width - cX).css("height", cY - oY); $("#divBottom").css("left", "0").css("top", cY); $("#divBottom").css("width", "100%").css("height", screen.height - cY); } </script>
[PS]: 现在完成了第一部分,选择出需要截取的图片。接下来的思路是:
-
通过C#代码,截取当前的屏幕图片。 在通过选择的两个point来截取部分图片。
-
截取后的内容保存为图片。然后提示出保存窗口,完成整个的截取过程
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