有没有办法在QML&中列出所有对象成员/属性? Qt 5.1?
如:
var obj=myQObject;
console.log(obj)
// expected output:
// obj { x:123..... }
这对调试非常有帮助。
答案 0 :(得分:18)
直接的javascript提供您所需的内容:
JSON.stringify(anything)
它适用于QML项目,例如Rectangle,它也适用于大多数任意对象!
答案 1 :(得分:11)
使用元对象,您可以调试任何QML obj
的所有属性(即QQuickItem)。
您需要一些C ++来获取QML组件的元对象,并在QML中将属性名称和值作为文本返回。
首先使用QMLDebugger
方法在C ++中创建properties
类:
QString QMLDebugger::properties(QQuickItem *item, bool linebreak)
{
const QMetaObject *meta = item->metaObject();
QHash<QString, QVariant> list;
for (int i = 0; i < meta->propertyCount(); i++)
{
QMetaProperty property = meta->property(i);
const char* name = property.name();
QVariant value = item->property(name);
list[name] = value;
}
QString out;
QHashIterator<QString, QVariant> i(list);
while (i.hasNext()) {
i.next();
if (!out.isEmpty())
{
out += ", ";
if (linebreak) out += "\n";
}
out.append(i.key());
out.append(": ");
out.append(i.value().toString());
}
return out;
}
此功能可以是静态的或可实现的,无关紧要。 QML不支持将静态方法从C ++导出到QML。我使用标题:
public:
Q_INVOKABLE static QString properties(QQuickItem *item, bool linebreak = true);
现在将类导出为QML。在你main.cpp
添加
#include "qmldebugger.h"
和
qmlRegisterType<QMLDebugger>("MyDemoLibrary", 1, 0, "QMLDebugger");
在你的QML文件中导入你的新库,创建一个QMLDebugger实例并开始快乐的调试:
import QtQuick 2.0
import MyDemoLibrary 1.0
Rectangle {
id: mainRectangle
width: 360
height: 360
color: "silver"
Text {
id: textElement
color: "#d71f1f"
text: qsTr("Hello World")
font.bold: true
font.italic: true
font.underline: true
style: Text.Raised
horizontalAlignment: Text.AlignHCenter
font.pointSize: 16
anchors.top: parent.top
anchors.left: parent.left
anchors.right: parent.right
}
QMLDebugger {
id: qmlDebugger
}
Component.onCompleted: {
console.log("Debug mainRectangle:");
console.log(qmlDebugger.properties(mainRectangle));
console.log("Debug textElement:");
console.log(qmlDebugger.properties(textElement, false));
}
}
上作为最小Qt Creator项目使用
答案 2 :(得分:8)
只需将QML / C ++组件/对象转换为JavaScript var对象,并使用for-each语法列出所有属性:
function listProperty(item)
{
for (var p in item)
console.log(p + ": " + item[p]);
}
在您的QML文件中,只需调用
即可onClicked:
{
listProperty(ItemID)
//or with this to list self properties
listProperty(this)
}
答案 3 :(得分:2)
如果任何人想要仅列出对象的属性,没有信号或插槽,则可以使用此
function listProperty(item)
{
for (var p in item)
{
if( typeof item[p] != "function" )
if(p != "objectName")
console.log(p + ":" + item[p]);
}
}
答案 4 :(得分:1)
如果您不仅对控制台调试感兴趣,KDAB(link)有一个名为GammaRay的程序,它允许您在QWidgets或基于QtQuick的程序的运行时期间内省并更改所有属性。非常整洁!
答案 5 :(得分:0)
我没有看到迭代所有属性的解决方案。但也许这可以帮助你迈出第一步。
对于每个Quick Item,您都可以打印Item
的属性:
import QtQuick 2.0
Rectangle {
width: 360
height: 360
function debugQuickItem(object) {
var properties = {
'activeFocus': object.activeFocus,
'activeFocusOnTab': object.activeFocusOnTab,
'anchors.alignWhenCentered': object.anchors.alignWhenCentered,
'anchors.baseline': object.anchors.baseline,
'anchors.baselineOffset': object.anchors.baselineOffset,
'anchors.bottom': object.anchors.bottom,
'anchors.bottomMargin': object.anchors.bottomMargin,
'anchors.centerIn': object.anchors.centerIn,
'anchors.fill': object.anchors.fill,
'anchors.horizontalCenter': object.anchors.horizontalCenter,
'anchors.horizontalCenterOffset': object.anchors.horizontalCenterOffset,
'anchors.left': object.anchors.left,
'anchors.leftMargin': object.anchors.leftMargin,
'anchors.margins': object.anchors.margins,
'anchors.right': object.anchors.right,
'anchors.rightMargin': object.anchors.rightMargin,
'anchors.top': object.anchors.top,
'anchors.topMargin': object.anchors.topMargin,
'anchors.verticalCenter': object.anchors.verticalCenter,
'anchors.verticalCenterOffset': object.anchors.verticalCenterOffset,
'antialiasing': object.antialiasing,
'baselineOffset': object.baselineOffset,
'children': object.children,
'childrenRect.height': object.childrenRect.height,
'childrenRect.width': object.childrenRect.width,
'childrenRect.x': object.childrenRect.x,
'childrenRect.y': object.childrenRect.y,
'clip': object.clip,
'data': object.data,
'enabled': object.enabled,
'focus': object.focus,
'height': object.height,
'implicitHeight': object.implicitHeight,
'implicitWidth': object.implicitWidth,
'layer.effect': object.layer.effect,
'layer.enabled': object.layer.enabled,
'layer.format': object.layer.format,
'layer.mipmap': object.layer.mipmap,
'layer.samplerName': object.layer.samplerName,
'layer.smooth': object.layer.smooth,
'layer.sourceRect': object.layer.sourceRect,
'layer.textureSize': object.layer.textureSize,
'layer.wrapMode': object.layer.wrapMode,
'opacity': object.opacity,
'parent': object.parent,
'resources': object.resources,
'rotation': object.rotation,
'scale': object.scale,
'smooth': object.smooth,
'state': object.state,
'states': object.states,
'transform': object.transform,
'transformOrigin': object.transformOrigin,
'transitions': object.transitions,
'visible': object.visible,
'visibleChildren': object.visibleChildren,
'width': object.width,
'x': object.x,
'y': object.y,
'z': object.z,
}
var out = "{ "
for (var key in properties)
{
out += "'" + key + "': " + properties[key] + ", "
}
out += "}"
return out;
}
Text {
id: textObject
anchors.centerIn: parent
text: "Hello World"
}
Component.onCompleted: console.log(debugQuickItem(textObject));
}
输出:
{'activeFocus':false,'activeFocusOnTab':false,'anchors.alignWhenCentered':true,'anchors.baseline':QVariant(QQuickAnchorLine),'anchors.baselineOffset':0,'anchors.bottom':QVariant (QQuickAnchorLine),'anchors.bottomMargin':0,'anchors.centerIn':QQuickRectangle_QML_0(0x29857d0),'anchors.fill':null,'anchors.horizontalCenter':QVariant(QQuickAnchorLine),'anchors.horizontalCenterOffset':0, 'anchors.left':QVariant(QQuickAnchorLine),'anchors.leftMargin':0,'anchors.margins':0,'anchors.right':QVariant(QQuickAnchorLine),'anchors.rightMargin':0,'anchors.top ':QVariant(QQuickAnchorLine),'anchors.topMargin':0,'anchors.verticalCenter':QVariant(QQuickAnchorLine),'anchors.verticalCenterOffset':0,'antialiasing':false,'baselineOffset':14,'children': [object Object],'childrenRect.height':0,'childrenRect.width':0,'childrenRect.x':0,'childrenRect.y':0,'clip':false,'data':[object Object ],'启用':true,'focus':false,'height':17,'implicitHeight':17 ,'implicitWidth':80.5625,'layer.effect':null,'layer.enabled':false,'layer.format':6408,'layer.mipmap':false,'layer.samplerName':source,'layer。 smooth':false,'layer.sourceRect':QRectF(0,0,0,0),'layer.textureSize':QSize(-1,-1),'layer.wrapMode':0,'opacity':1 ,'parent':QQuickRectangle_QML_0(0x29857d0),'resources':[object Object],'rotation':0,'scale':1,'smooth':true,'state':,'states':[object Object] ,'transform':[object Object],'transformOrigin':4,'transitions':[object Object],'visible':true,'visibleChildren':[object Object],'width':80.5625,'x': 139.71875,'y':171,'z':0,}