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Update users displayed per scrollbar position

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This commit is contained in:
David Rowe 2015-03-26 11:21:56 -07:00
parent 14e92eecad
commit c7fe7aa157
1 changed files with 18 additions and 6 deletions
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24
examples/users.js
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@ -44,6 +44,7 @@ var usersWindow = (function () {
usersOnline, // Raw users data
linesOfUsers = [], // Array of indexes pointing into usersOnline
numUsersToDisplay = 0,
firstUserToDisplay = 0,
API_URL = "https://metaverse.highfidelity.com/api/v1/users?status=online",
HTTP_GET_TIMEOUT = 60000, // ms = 1 minute
@ -102,6 +103,12 @@ var usersWindow = (function () {
// Corresponding number of users to actually display
numUsersToDisplay = Math.max(Math.round((windowHeight - nonUsersHeight) / windowLineHeight), 0);
isUsingScrollbars = 0 < numUsersToDisplay && numUsersToDisplay < linesOfUsers.length;
if (isUsingScrollbars) {
firstUserToDisplay = Math.floor(scrollbarValue * (linesOfUsers.length - numUsersToDisplay));
} else {
firstUserToDisplay = 0;
scrollbarValue = 0.0;
}
}
function updateOverlayPositions() {
@ -163,7 +170,7 @@ var usersWindow = (function () {
reducedTextWidth = maxTextWidth - ellipsisWidth;
for (i = 0; i < numUsersToDisplay; i += 1) {
user = usersOnline[linesOfUsers[i]];
user = usersOnline[linesOfUsers[firstUserToDisplay + i]];
userText = user.text;
textWidth = user.textWidth;
@ -320,6 +327,7 @@ var usersWindow = (function () {
minY,
maxY,
lineClicked,
userClicked,
i,
visibilityChanged;
@ -334,7 +342,7 @@ var usersWindow = (function () {
overlayX = event.x - WINDOW_MARGIN_2D;
overlayY = event.y - viewportHeight + windowHeight - WINDOW_MARGIN_2D - windowLineHeight;
numLinesBefore = Math.floor(overlayY / windowLineHeight);
numLinesBefore = Math.round(overlayY / windowLineHeight);
minY = numLinesBefore * windowLineHeight;
maxY = minY + windowTextHeight;
@ -343,10 +351,12 @@ var usersWindow = (function () {
lineClicked = numLinesBefore;
}
if (0 <= lineClicked && lineClicked < linesOfUsers.length
&& 0 <= overlayX && overlayX <= usersOnline[linesOfUsers[lineClicked]].textWidth) {
//print("Go to " + usersOnline[linesOfUsers[lineClicked]].username);
location.goToUser(usersOnline[linesOfUsers[lineClicked]].username);
userClicked = firstUserToDisplay + lineClicked;
if (0 <= userClicked && userClicked < linesOfUsers.length
&& 0 <= overlayX && overlayX <= usersOnline[linesOfUsers[userClicked]].textWidth) {
//print("Go to " + usersOnline[linesOfUsers[userClicked]].username);
location.goToUser(usersOnline[linesOfUsers[userClicked]].username);
}
}
@ -381,7 +391,9 @@ var usersWindow = (function () {
scrollbarValue = (event.y - scrollbarBarClickedAt * scrollbarBarHeight - scrollbarBackgroundPosition.y)
/ (scrollbarBackgroundHeight - scrollbarBarHeight - 2);
scrollbarValue = Math.min(Math.max(scrollbarValue, 0.0), 1.0);
firstUserToDisplay = Math.floor(scrollbarValue * (linesOfUsers.length - numUsersToDisplay));
updateOverlayPositions();
updateUsersDisplay();
} else {
isMovingScrollbar = false;
}