有人知道如何删除此间距吗?
下面的那些线会减少它们,但不能完全消除。
margins.top: 0
margins.bottom: 0
margins.left: 0
margins.right: 0
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更新 我添加了一些代码。也许这可以帮助确定我的问题。最初,箭头所在的空格用于图例和刻度值。我在不更改源代码的情况下无法执行任何操作。
ScopeView.qml
import QtQuick 2.0
import QtCharts 2.1
ChartView {
id: chartView
animationOptions: ChartView.NoAnimation
theme: ChartView.ChartThemeQt
legend.visible: false
margins.top: 0
margins.bottom: 0
margins.left: 0
margins.right: 0
backgroundRoundness: 0
property bool openGL: true
onOpenGLChanged: {
series("signal 1").useOpenGL = openGL;
}
ValueAxis {
id: axisY1
min: -1
max: 4
labelsVisible: false
tickCount: 3
color: "transparent"
}
ValueAxis {
id: axisX
min: 0
max: 1024
labelsVisible: false
tickCount: 4
color: "transparent"
}
LineSeries {
id: lineSeries1
name: "signal 1"
axisX: axisX
axisY: axisY1
useOpenGL: chartView.openGL
color: "#44D77B"
}
Timer {
id: refreshTimer
interval: 1 / 60 * 1000 // 60 Hz
running: true
repeat: true
onTriggered: {
dataSource.update(chartView.series(0));
}
}
function changeSeriesType(type) {
chartView.removeAllSeries();
// Create two new series of the correct type. Axis x is the same for both of the series,
// but the series have their own y-axes to make it possible to control the y-offset
// of the "signal sources".
if (type == "line") {
var series1 = chartView.createSeries(ChartView.SeriesTypeLine, "signal 1",
axisX, axisY1);
series1.useOpenGL = chartView.openGL
} else {
var series1 = chartView.createSeries(ChartView.SeriesTypeScatter, "signal 1",
axisX, axisY1);
series1.markerSize = 2;
series1.borderColor = "transparent";
series1.useOpenGL = chartView.openGL
}
}
function createAxis(min, max) {
// The following creates a ValueAxis object that can be then set as a x or y axis for a series
return Qt.createQmlObject("import QtQuick 2.0; import QtCharts 2.0; ValueAxis { min: "
+ min + "; max: " + max + " }", chartView);
}
function setAnimations(enabled) {
if (enabled)
chartView.animationOptions = ChartView.SeriesAnimations;
else
chartView.animationOptions = ChartView.NoAnimation;
}
function changeRefreshRate(rate) {
refreshTimer.interval = 1 / Number(rate) * 1000;
}
}
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更新二
诀窍是使用clipchartView并将其放置into为矩形。
Rectangle {
id: canvas
anchors{
left: parent.left
right: parent.right
top: parent.top
}
height: 250
color: "#FFFFFF"
z: propText.z - 1
clip: true
Rectangle {
width: parent.width
height: 40
z: 1
color: "#FFFFFF"
}
GraphView{ //ChartView
id: graphView
isTimerRunnig: isRunning
channelId: channelId
}
}
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和 ChartView aka GraphView
ChartView {
id: chartView
property alias channelId: dataSource.channelId
property alias isTimerRunnig: refreshTimer.running
property bool openGL: true
antialiasing: !openGL
legend.visible: false
margins.top: 0
margins.bottom: 0
margins.left: 0
margins.right: 0
x: -70
y: 20
width: 360
height: 262
backgroundRoundness: 0
onOpenGLChanged: {
series("signal 1").useOpenGL = openGL;
}
DataSource {
id: dataSource
channelId: channelId
isPaused: !isTimerRunnig
onIsPausedChanged: {
if(isPaused){
lineSeries1.clear()
}
}
}
ValueAxis {
id: axisY
//gridVisible: false
labelsVisible: false
tickCount: 3
color: "transparent"
}
ValueAxis {
id: axisX
min: 0
max: 100
//gridVisible: false
labelsVisible: false
tickCount: 4
color: "transparent"
}
LineSeries {
id: lineSeries1
name: "signal 1"
axisX: axisX
axisY: axisY
useOpenGL: chartView.openGL
color: "#44D77B"
width: 2
}
Timer {
id: refreshTimer
interval: 1 / 25 * 1000 // 25 Hz
running: isTimerRunnig
repeat: true
onTriggered: {
dataSource.updateFromQML(chartView.series(0), chartView.axisY(chartView.series(0)))
//dataSource.printChannelId()
}
}
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}
可能的解决方案1:QMargins属性指定绘图区域周围的最小区域。尝试通过调整子代(图)本身来填充剩余的填充。
plotArea:rect ChartView上用于绘图系列的区域。这是没有边距的ChartView矩形。
可能的解决方案2:设置边距后,尝试重新绘制父布局。如果在创建窗口之后调整边距,则不一定会立即刷新视图。
小智 5
我遇到了同样的问题,但不太明白解决方案 1 中接受的答案意味着什么。我找到了一个对我有用的问题的解决方案,所以我将它作为另一个答案发布在这里。
(我很想更具体地知道接受的灵魂是什么,但我还不能评论其他人的答案。)
我的解决方案是在任何情况下(除了将边距设置为 0 如问题所示,并且图例和轴不可见):
ChartView
{
x: -10
y: -10
width: parent.width + 20
height: parent.height + 20
}
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这只是手动将 Chartview 的绘图区域移动到父组件的左上角并适当调整其大小。我不知道数字 10 来自哪里,但这似乎是剩余边距的大小。这个问题的“真正”答案是如何以更健壮的方式将其设置为 0。
如果此答案与已接受的答案中提到的答案相同,或者该答案确实更可靠,请告诉我!