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authorFlorian <stayawake@lavabit.com>2014-02-07 17:58:57 +0100
committerFlorian <stayawake@lavabit.com>2014-02-07 17:58:57 +0100
commite75c7a5cb28307509b68c2a0832d704abdd7c565 (patch)
tree47d75d9948fa3690c10c33dee21d3aeff8adcf18
parente92d63f5e363a20b67b0a53ae1e470b8ad0e0918 (diff)
store current snapshot/testbild locally on enter.
-rw-r--r--js/cctv-control.js50
1 files changed, 47 insertions, 3 deletions
diff --git a/js/cctv-control.js b/js/cctv-control.js
index c79346d..3d5fa68 100644
--- a/js/cctv-control.js
+++ b/js/cctv-control.js
@@ -34,10 +34,10 @@ function changeCam() {
if (cam <= 7 && cam >= 0) {
camDisplay = cam + 1;
display.innerHTML = '<p class="camnumber">' + camDisplay + '</p>';
- display.innerHTML += '<img src="http://' + camHost + '/cam/' + cam + '/stream.mjpeg" />';
+ display.innerHTML += '<img id="camImage" src="http://' + camHost + '/cam/' + cam + '/stream.mjpeg" />';
}
else {
- display.innerHTML = '<img src="img/testbild.png" />';
+ display.innerHTML = '<img id="camImage" src="img/testbild.gif" />';
}
}
@@ -51,6 +51,47 @@ function controlCam(direction) {
}
}
+//save current screenshot in local storage
+function saveImage() {
+
+ var storageFiles = {}, //local storage object
+ xhr = new XMLHttpRequest(),
+ blob,
+ fileReader = new FileReader(),
+ snapShot = new Image(), //dummy-object to display snapshot
+ imgCanvas = document.createElement("canvas"),
+ imgContext = imgCanvas.getContext("2d");
+
+
+ xhr.open("GET", 'img/testbild-' + camDisplay + '.png', true);
+ xhr.responseType = "arraybuffer";
+
+ xhr.addEventListener("load", function () {
+ if (xhr.status === 200) {
+
+ blob = new Blob([xhr.response], {type: "image/png"});
+
+
+ fileReader.onload = function (evt) {
+ var result = evt.target.result;
+
+ snapShot.src = result;
+
+ try {
+ localStorage.setItem("snapShot", result);
+ }
+ catch (e) {
+ console.log("Storage failed: " + e);
+ }
+ };
+
+ fileReader.readAsDataURL(blob);
+ }
+ }, false);
+
+ xhr.send();
+}
+
function keyDown(event) {
switch(event.keyCode) {
@@ -98,5 +139,8 @@ function keyDown(event) {
case 40: // arrow down
controlCam("down");
break;
- }
+ case 13: //enter
+ saveImage();
+ break;
+ }
}