C
QML API changes
Removed QML types and features
Here is a list of removed QML types and modules
| QML API or module | Alternative |
|---|---|
| Qt Charts module | There is no replacement, but a workaround with static images can be used. Refer to the thermostat demo. |
| Javascript Date API | Currently there is no replacement. |
toFixedInt() | toFixed() |
toExponentialAuto() | toExponential() |
Moved QulPerf
QulPerf has been moved to the Qt Quick Ultralite Extras QML module. You should now import the Qt Quick Ultralite Extras QML module to use it.
| Qt for MCUs v1.9 and earlier | Qt for MCUs v2.0 and later |
|---|---|
import QtQuick 2.15 Row { id: root visible: QulPerf.enabled PerformanceMetricItem { label: "FPS:" value: QulPerf.fps.toFixed(2) } } | import QtQuick 2.15 import QtQuickUltralite.Extras 2.0 Row { id: root visible: QulPerf.enabled PerformanceMetricItem { label: "FPS:" value: QulPerf.fps.toFixed(2) } } |
JavaScript expressions in a ListElement
JavaScript expressions can no longer be bound with a property value in a ListElement. The ListElement now limits the possible values to constants and qsTr() / qsTrId() calls only. These changes are compatible with Qt.
| Qt for MCUs v1.9 and earlier | Qt for MCUs v2.0 and later |
|---|---|
ListModel {
id: fruitModel
ListElement {
name: "Apple"
cost: { 5 + 10 }
}
ListElement {
name: "Orange"
cost: 3.25
}
} | ListModel {
id: fruitModel
ListElement {
name: "Apple"
cost: 15
}
ListElement {
name: "Orange"
cost: 3.25
}
} |
Item margins in AnchorChanges
AnchorChanges can no longer be used to modify the margins of an item. Use PropertyChanges instead.
| Qt for MCUs v1.9 and earlier | Qt for MCUs v2.0 and later |
|---|---|
AnchorChanges {
target: myRect
anchors {
top: anchorRectEnd.top
bottom: anchorRectEnd.bottom
left: anchorRectEnd.left
right: anchorRectEnd.right
topMargin: 20
bottomMargin: 20
leftMargin: 20
rightMargin: 20
}
} | AnchorChanges {
target: myRectanchors {
top: anchorRectEnd.top
bottom: anchorRectEnd.bottom
left: anchorRectEnd.left
right: anchorRectEnd.right
}
}
PropertyChanges {
target: myRect
anchors {
topMargin: 20
bottomMargin: 20
leftMargin: 20
rightMargin: 20
}
} |
Text alignment
The enumeration values for horizontalAlignment and verticalAlignment properties have been unified for both Text and StaticText items. These types now use the Text.horizontalAlignment and Text.verticalAlignment values instead.
| Qt for MCUs v1.9 and earlier | Qt for MCUs v2.0 and later |
|---|---|
StaticText {
horizontalAlignment: StaticText.AlignRight
verticalAlignment: StaticText.AlignVCenter
text: "right aligned"
} | StaticText {
horizontalAlignment: Text.AlignRight
verticalAlignment: Text.AlignVCenter
text: "right aligned"
} |
Limit Font.unicodeCoverage usage
The font.unicodeCoverage property is supported in Qt.font() context only.
| Qt for MCUs v1.9 and earlier | Qt for MCUs v2.0 and later |
|---|---|
Text {
font.unicodeCoverage: [Font.UnicodeBlock_BasicLatin]
} | Text {
font: Qt.font({ unicodeCoverage: [Font.UnicodeBlock_BasicLatin]})
} |
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