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Restructured API demo

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This commit is contained in:
Joel Collins 2018-11-09 16:45:04 +00:00
parent 2a52109c30
commit 740bf8fb68
3 changed files with 327 additions and 203 deletions
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190
openflexure_microscope/api/static/main_v1.js Normal file
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// TODO: Remember a position and restore that position
// TODO: Right click to auto-focus, centered on that region
var baseURI = "/api/v1"
// Key IDs
var pgupKeyID = 33;
var pgdnKeyID = 34;
var leftKeyID = 37;
var upKeyID = 38;
var rightKeyID = 39;
var downKeyID = 40;
var enterKeyID = 13;
var escKeyID = 27;
var keysDown = {}; //Array of keys down
var stageVelocity = 50;
var focusVelocity = 20;
var requestLock = false;
// Microscope client-side callibration
//TODO: Move to serverside microscope property
var fovX = 4100;
var fovY = 3146;
window.onload = function() {
getStagePositions()
}
function updateTextBoxes() {
document.getElementById('stageVelocityText').value = stageVelocity;
document.getElementById('focusVelocityText').value = focusVelocity;
document.getElementById('fovXText').value = fovX;
document.getElementById('fovYText').value = fovY;
}
function updateStagePositions(response) {
document.getElementById('x_abs').value = response["x"];
document.getElementById('y_abs').value = response["y"];
document.getElementById('z_abs').value = response["z"];
}
function getStagePositions() {
function updatePositionCallback(response, status) {
console.log(status, response);
updateStagePositions(response);
}
safeRequest("GET", baseURI+"/position", null, updatePositionCallback)
}
function setStagePositions(x_abs, y_abs, z_abs) {
// Make a position request
function absMoveCallback(response, status) {
if (status == 400) {
alert("Stage cannot be moved further than the safe range.");
}
console.log(status, response);
updateStagePositions(response);
}
safeRequest("POST", baseURI+"/position", { "absolute": true, "x": x_abs, "y": y_abs, "z": z_abs}, absMoveCallback)
}
function moveStagePositions(x_rel, y_rel, z_rel) {
// Make a position request
function relMoveCallback(response, status) {
if (status == 400) {
alert("Stage cannot be moved further than the safe range.");
}
console.log(status, response);
updateStagePositions(response);
}
safeRequest("POST", baseURI+"/position", { "absolute": false, "x": x_rel, "y": y_rel, "z": z_rel}, relMoveCallback)
}
function setStagePositionsFromInput() {
x_abs = Number(document.getElementById('x_abs').value);
y_abs = Number(document.getElementById('y_abs').value);
z_abs = Number(document.getElementById('z_abs').value);
setStagePositions(x_abs, y_abs, z_abs)
}
// Standard callback for user-controller movement
function keyMoveCallback(response, status) {
console.log(status, response);
updateStagePositions(response);
}
// Methods for input events
// Click-to-move
function clickHotspotImage(event) {
if (document.getElementById("clickPositionCheck").checked == true) {
xCoordinate = event.offsetX;
yCoordinate = event.offsetY;
console.log(xCoordinate, yCoordinate)
xRelative = (0.5*event.target.offsetWidth - xCoordinate)/event.target.offsetWidth;
yRelative = (0.5*event.target.offsetHeight - yCoordinate)/event.target.offsetHeight;
console.log(xRelative, yRelative)
xSteps = xRelative * fovX;
ySteps = yRelative * fovY;
console.log(xSteps, ySteps, 0)
// Make a position request
moveStagePositions(xSteps, ySteps, 0)
}
}
// Scroll-to-focus
window.addEventListener('wheel', function(e) {
multiplier = 1/100;
z_delta = e.deltaY * multiplier * focusVelocity;
if (document.getElementById("scrollFocusCheck").checked == true) {
console.log(z_delta);
// Make a position request
safeRequest("POST", baseURI+"/position", { "absolute": false, "z": z_delta}, keyMoveCallback)
}
});
// Keyboard to move
addEventListener("keydown", function (e) {
keysDown[e.keyCode] = true; //Add key to array
console.log(keysDown)
// If stage movement keys are pressed
if ((leftKeyID in keysDown) || (rightKeyID in keysDown) || (upKeyID in keysDown) || (downKeyID in keysDown) || (pgupKeyID in keysDown) || (pgdnKeyID in keysDown)) {
// Calculate movement array
x_rel = 0;
y_rel = 0;
z_rel = 0;
if (leftKeyID in keysDown) {
x_rel = x_rel + stageVelocity;
}
if (rightKeyID in keysDown) {
x_rel = x_rel - stageVelocity;
}
if (upKeyID in keysDown) {
y_rel = y_rel + stageVelocity;
}
if (downKeyID in keysDown) {
y_rel = y_rel - stageVelocity;
}
if (pgupKeyID in keysDown) {
z_rel = z_rel - focusVelocity;
}
if (pgdnKeyID in keysDown) {
z_rel = z_rel + focusVelocity;
}
// Make a position request
moveStagePositions(x_rel, y_rel, z_rel)
}
}, false);
addEventListener("keyup", function (e) {
delete keysDown[e.keyCode]; //Remove key from array
}, false);
// Methods for making requests
function safeRequest(method, url, payload, callback) {
if (requestLock == false) {
var xhr = new XMLHttpRequest(); // new HttpRequest instance
xhr.open(method, url);
requestLock = true;
xhr.onload = function (e) {
if (xhr.readyState === 4) {
if (xhr.status !== 200) {
console.error(xhr.statusText);
}
callback(JSON.parse(xhr.responseText), xhr.status);
}
requestLock = false;
};
if (method == "POST" || method == "PUT") {
xhr.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
}
xhr.send(JSON.stringify(payload));
}
else {
console.log("Cannot start new request while previous requets is pending...")
}
}