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QML表单布局(GridLayout)的麻烦

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我现在正在尝试将我的应用UI从C转换为QML . 在某些步骤我需要一个登录窗口,所以我用QML创建它,代码如下:

Window {
    id: loginWindow
    property string username: login.text;
    property string password: password.text;
    property bool issave: savePassword.checked;

    flags: Qt.Dialog
    modality: Qt.WindowModal
    width: 400
    height: 160
    minimumHeight: 160
    minimumWidth: 400
    title: "Login to program"

    GridLayout {
        columns: 2
        anchors.fill: parent
        anchors.margins: 10
        rowSpacing: 10
        columnSpacing: 10

        Label {
            text: "Login"
        }
        TextField {
            id: login
            text: Config.getParam("user")
            Layout.fillWidth: true
        }

        Label {
            text: "Password"
        }
        TextField {
            id: password
            text: Config.getParam("password")
            echoMode: TextInput.Password
            Layout.fillWidth: true
        }

        Label {
            text: "Save password?"
        }
        CheckBox {
            id: savePassword
        }

        Item {
            Layout.columnSpan: 2
            Layout.fillWidth: true
            Button {
                anchors.centerIn: parent
                text: "Enter"
                onClicked: {
                    loginWindow.close();
                }
            }
        }
    }
}

我使用GridLayout作为更兼容的表单布局 . 但窗口看起来并不像预期的那样 . 这是一个截图:

Screenshot

GridLayout具有10px的余量,行/列之间也有10px .

但是在屏幕截图中可以看到带按钮的行既没有边距也没有间距 .

我做错了什么?

Qt 5.3.0 Debian 7.5 x32

1 回答

  • 11

    问题是包含Button的Item没有设置高度 . 在调试布局问题时,首先要检查这类问题 . 您可以通过打印项目的几何图形来完成此操作:

    Item {
        Layout.columnSpan: 2
        Layout.fillWidth: true
    
        Component.onCompleted: print(x, y, width, height)
    
        Button {
            anchors.centerIn: parent
            text: "Enter"
            onClicked: {
                loginWindow.close();
            }
        }
    }
    

    这输出:

    qml:0 87 118 0

    修复:

    Item {
        Layout.columnSpan: 2
        Layout.fillWidth: true
        implicitHeight: button.height
    
        Button {
            id: button
            anchors.centerIn: parent
            text: "Enter"
            onClicked: {
                loginWindow.close();
            }
        }
    }
    

    完整的代码:

    import QtQuick 2.2
    import QtQuick.Window 2.0
    import QtQuick.Controls 1.1
    import QtQuick.Layouts 1.1
    
    Window {
        id: loginWindow
        property string username: login.text;
        property string password: password.text;
        property bool issave: savePassword.checked;
    
        flags: Qt.Dialog
        modality: Qt.WindowModal
        width: 400
        height: 160
        minimumHeight: 160
        minimumWidth: 400
        title: "Login to program"
    
        GridLayout {
            columns: 2
            anchors.fill: parent
            anchors.margins: 10
            rowSpacing: 10
            columnSpacing: 10
    
            Label {
                text: "Login"
            }
            TextField {
                id: login
                text: "blah"
                Layout.fillWidth: true
            }
    
            Label {
                text: "Password"
            }
            TextField {
                id: password
                text: "blah"
                echoMode: TextInput.Password
                Layout.fillWidth: true
            }
    
            Label {
                text: "Save password?"
            }
            CheckBox {
                id: savePassword
            }
    
            Item {
                Layout.columnSpan: 2
                Layout.fillWidth: true
                implicitHeight: button.height
    
                Button {
                    id: button
                    anchors.centerIn: parent
                    text: "Enter"
                    onClicked: {
                        loginWindow.close();
                    }
                }
            }
        }
    }
    

    form

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