qtquick2

问题 "True Transparency" explanation (image, 76kb). On that image ApplicationWindow have a visually transparent layer. But in fact, cursor does not go to the window behind ApplicationWindow (in this case - QT Creator). "True Transparency" is achieved if add (uncomment) "Qt.WindowTransparentForInput" flag, but the buttons are no longer available (it's are obvious, I know). I have tried a various flags with similar meanings (from the documentation), but did not find a working combination - cursor

问题 Assume you have created the following custom QGraphicsRectItem in C++: class MyCustomItem : public QGraphicsRectItem { public: MyCustomItem(MyCustomItem* a_Parent = 0); virtual ~MyCustomItem(); // specific methods private: // specific data }; Assume also that you have defined in a QML script an ApplicationWindow : // main.qml import QtQuick 2.4 import QtQuick.Controls 1.3 import QtQuick.Window 2.0 ApplicationWindow { id: myWindow title: qsTr("My Window") width: 640 height: 480 visible: true }

问题 I have a model that contains several QStandardItemModels . Now I want to create a view that displays a TableView for each QStandardItemModel . I had the idea to have a ListView that has a TableView as delegate, something like this: ListView { id: myListView anchors { fill: parent margins: 5 } model: testModel delegate: CompareDelegate { } } And in CompareDelegate.qml : Item { id: base width: 500 height: 300 TableView { anchors.fill: parent } } How do I get the TableView inside the delegate to

问题 Here is my QML code : Rectangle { ..... Rectangle { ....height and width is smaller than parent MouseArea { id: mouseArea2 anchors.fill: parent hoverEnabled: true onEntered: { console.log("enter 2") } } } MouseArea { id: mouseArea1 anchors.fill: parent hoverEnabled: true onEntered: { console.log("enter 1") } } } Only mouseArea1 takes effect. If I remove mouseArea1 then mouseArea2 takes effect. So I think the mouse event must be handled by mouseArea1 and let it couldn't be passed to mouseArea2

问题 like the web pages,when content's high beyond the rectangle,there is a scrollbar. Is there anyone else who can help me? I have tried with listview,but I can't use it in a rectangle 回答1: There is an example in the docs, how to use ScrollBar without a Flickable: import QtQuick 2.7 import QtQuick.Controls 2.0 Rectangle { id: frame clip: true width: 160 height: 160 border.color: "black" anchors.centerIn: parent Text { id: content text: "ABC" font.pixelSize: 160 x: -hbar.position * width y: -vbar

问题 I have some sibling Rectangle elements with a radius property so they appear as circles. Each has a child Item that has a child MouseArea, the purpose of the Item being to implement a "round mouse area" effect (original SO answer). The Item and MouseArea are instrumented such that clicks and drags will only take effect within the visible circular shape of the Rectangle, not within the bounding box that is the real footprint of the Rectangle. Unfortunately there is a glitch illustrated below.

问题 ApplicationWindow { id: root property string rootName: "--rootName" visible: true width: 800 height: 400 title: qsTr("WatchFace Maker") WatchLcd{ property string watchLcdInApp: "watchLcdInApp" id: watchLcd } TextAdder{ id: textAdder Component.onCompleted: { console.log("APP: ", root.watchLcd.watchLcdInApp)//#Error!!! remove root, it works. } } } I want to know: Why it doesn't work when I add root id in above commented line? How do children component access sibling component's property if

问题 I want to draw a rectangle around a QML Text object that is using word wrapping. TextMetrics seems like it would be ideal, but it does not appear to support wrapped text. How can I measure how text is laid out in a Text object? Must I match the wrapping logic and manually calculate the offsets using TextMetrics and FontMetrics? 回答1: You can use contentWidth and contentHeight: Text { text: "..." wrapMode: Text.Wrap Rectangle { border.color: "red" color: "transparent" width: parent.contentWidth

问题 So I was finally able to reproduce it in an MCVE: // S_Settings.qml pragma Singleton import QtQuick 2.7 Item { property real bsize: 50 } // in main() qmlRegisterSingletonType(QUrl(QStringLiteral("qrc:/S_Settings.qml")), "Set", 1, 0, "SS"); // main.qml import QtQuick 2.7 import QtQuick.Window 2.2 import Set 1.0 Window { id: main visible: true width: 300 height: 200 Rectangle { anchors.centerIn: parent width: SS.bsize * 4 height: SS.bsize * 2 radius: SS.bsize * .5 color: "red" border.color:

问题 When exactly are Qt Quick items repainted? I.e. on which events? For example, if I have overlapping items A and B, and I change a property of A, will B get repainted as well? If not, how can it work? What if they are non-overlapping? 来源： https://stackoverflow.com/questions/40040954/when-exactly-are-qt-quick-items-repainted