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Merge pull request #15782 from zfox23/SUI/resizeSignal

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BUGZ-699: Make PSFListModel fetch early when making container bigger
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Zach Fox 2019-06-17 15:27:21 -07:00 committed by GitHub
commit 32aec78ea2
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 29 additions and 14 deletions
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40
interface/resources/qml/hifi/models/PSFListModel.qml
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@ -75,21 +75,31 @@ ListModel {
// 1: equivalent to paging when reaching end (and not before).
// 0: don't getNextPage on scroll at all here. The application code will do it.
property real pageAhead: 2.0;
function needsEarlyYFetch() {
return flickable
&& !flickable.atYBeginning
&& (flickable.contentY - flickable.originY) >= (flickable.contentHeight - (pageAhead * flickable.height));
function onContentXChanged() {
if (flickable &&
!flickable.atXBeginning &&
(flickable.contentX - flickable.originX) >= (flickable.contentWidth - (pageAhead * flickable.width))) {
getNextPage();
}
}
function needsEarlyXFetch() {
return flickable
&& !flickable.atXBeginning
&& (flickable.contentX - flickable.originX) >= (flickable.contentWidth - (pageAhead * flickable.width));
function onContentYChanged() {
if (flickable &&
!flickable.atYBeginning &&
(flickable.contentY - flickable.originY) >= (flickable.contentHeight - (pageAhead * flickable.height))) {
getNextPage();
}
}
function getNextPageIfHorizontalScroll() {
if (needsEarlyXFetch()) { getNextPage(); }
function onWidthChanged() {
if (flickable &&
(flickable.contentX - flickable.originX) >= (flickable.contentWidth - (pageAhead * flickable.width))) {
getNextPage();
}
}
function getNextPageIfVerticalScroll() {
if (needsEarlyYFetch()) { getNextPage(); }
function onHeightChanged() {
if (flickable &&
(flickable.contentY - flickable.originY) >= (flickable.contentHeight - (pageAhead * flickable.height))) {
getNextPage();
}
}
function needsMoreHorizontalResults() {
return flickable
@ -118,8 +128,10 @@ ListModel {
initialized = true;
if (flickable && pageAhead > 0.0) {
// Pun: Scrollers are usually one direction or another, such that only one of the following will actually fire.
flickable.contentXChanged.connect(getNextPageIfHorizontalScroll);
flickable.contentYChanged.connect(getNextPageIfVerticalScroll);
flickable.contentXChanged.connect(onContentXChanged);
flickable.contentYChanged.connect(onContentYChanged);
flickable.widthChanged.connect(onWidthChanged);
flickable.heightChanged.connect(onHeightChanged);
flickable.contentWidthChanged.connect(getNextPageIfNotEnoughHorizontalResults);
flickable.contentHeightChanged.connect(getNextPageIfNotEnoughVerticalResults);
}

3
interface/resources/qml/hifi/models/qmldir Normal file
View file

@ -0,0 +1,3 @@
module hifiModels
PSFListModel 1.0 PSFListModel.qml
S3Model 1.0 S3Model.qml