QML虚拟键盘尺寸

Question

我无法找到虚拟键盘的尺寸.这是一个例子:

Rectangle {
    Component.onCompleted: {
        Qt.inputMethod.visibleChanged.connect(resizeForKeyboard)
    }

    Component.onDestruction: {
        Qt.inputMethod.visibleChanged.disconnect(resizeForKeyboard)
    }

    function resizeForKeyboard(){
        console.log('Visibility changed!!!');
        var keys = Object.keys(Qt.inputMethod.keyboardRectangle);
        var rect = Qt.inputMethod.keyboardRectangle;
        //A simple script I have for debugging, this loops 
        //through the keys and prints all properties
        DataMethods.printObject(keys, '[INPUT]');
        DataMethods.printObject(rect , '[RECTANGLE]');
    }

    //using the controls to save time
    TextField {
      focus: true //force keyboard to show up.
    }
}

datamethods.js(相关方法)

/**
 * This method prints an object to the console for debug purposes
 * obj -> the objec to print
 * prefix -> the prefix to append "[prefix] -> "...
 * props -> a list of properties to use, otherwiese all will be printed
 */
function printObject(obj, prefix, props) {
    if(!prefix)
        prefix = "obj";

    if(obj){
        console.log(prefix + obj + "->" + typeof obj);
        if(props){
            for(var p in obj)
                console.log('\t' + prefix + "["+ p + "] -> '" + obj[p] + "'");
        } else {
            for(var p in obj)
                console.log('\t' + prefix + "["+ p + "] -> '" + obj[p] + "'");
        }
    } else {
        console.log(prefix + "is null");
    }
}

这是输出:

[INPUT]objectName,cursorRectangle,keyboardRectangle,visible,animating,locale,inputDirection,destroyed,destroyed,objectNameChanged,deleteLater,_q_reregisterTimers,cursorRectangleChanged,keyboardRectangleChanged,visibleChanged,animatingChanged,localeChanged,inputDirectionChanged,show,hide,update,reset,commit,invokeAction->object
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][0] -> 'objectName'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][1] -> 'cursorRectangle'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][2] -> 'keyboardRectangle'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][3] -> 'visible'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][4] -> 'animating'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][5] -> 'locale'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][6] -> 'inputDirection'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][7] -> 'destroyed'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][8] -> 'destroyed'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][9] -> 'objectNameChanged'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][10] -> 'deleteLater'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][11] -> '_q_reregisterTimers'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][12] -> 'cursorRectangleChanged'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][13] -> 'keyboardRectangleChanged'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][14] -> 'visibleChanged'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][15] -> 'animatingChanged'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][16] -> 'localeChanged'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][17] -> 'inputDirectionChanged'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][18] -> 'show'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][19] -> 'hide'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][20] -> 'update'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][21] -> 'reset'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][22] -> 'commit'
D/Qt      (30122): qrc:js/datamethods.js:153 (printObject):     [INPUT][23] -> 'invokeAction'
D/Qt      (30122): qrc:js/datamethods.js:147 (printObject): [RECTANGLE]QRectF(0, 0, 0, 0)->object

我可能会以完全错误的方式解决这个问题,我希望有办法处理它.我需要设备上的键盘大小的原因是我可以在我的UI中响应而不是埋在它下面的控件(这样用户可以继续滚动表单).

如您所见keyboardRectangle,Qt.inputMethod 的属性似乎是默认值.

我应该在哪里检索此信息,信号似乎正确,因为它在虚拟键盘的打开/关闭时触发？

Answer 1

我能够通过使用获取QDesktopWidget::availableGeometry();可用屏幕尺寸、QDesktopWidget::screenGeometry();获取全屏尺寸和一些 Java 代码来获取菜单栏尺寸来获取虚拟键盘尺寸。

以下是代码中最相关的部分：

C++方面：

QRect KeyboardInterface::rect()
{
    int menuheight = (int)QAndroidJniObject::callStaticMethod<jint>("org.qtproject.example.Demo2.JavaInterface", "getHeight");

    QDesktopWidget widget;
    QRect rect = widget.availableGeometry();
    QRect geom = widget.screenGeometry();

    rect.moveTop(rect.top() + menuheight);
    geom.setTop(geom.top() + menuheight);

    QRect final;

    if (rect != geom)
    {
        int ftop, fleft, fwidth, fheight;

        geom.getRect(&fleft, &ftop, &fwidth, &fheight);

        if (rect.top() != ftop)
            fheight = rect.top();
        else if (rect.left() != fleft)
            fwidth = rect.left();
        else if (rect.height() != fheight)
            ftop = rect.height();
        else if (rect.width() != fwidth)
            fleft = rect.width();

        final = QRect(fleft, ftop, fwidth - fleft, fheight - ftop);
    }

    return final;
}

Java端：

package org.qtproject.example.Demo2;

import android.app.Activity;
import android.graphics.Rect;
import android.view.View;
import android.view.Window;

public class JavaInterface extends org.qtproject.qt5.android.bindings.QtActivity
{
    private static JavaInterface instance;

    public JavaInterface()
    {
        instance = this;
    }

    public static int getHeight()
    {
        Rect r = new Rect();
        Window window = instance.getWindow();
        View rootview = window.getDecorView();
        rootview.getWindowVisibleDisplayFrame(r);

        return r.top;
    }
}

该项目的完整源代码可以在这里找到

希望有帮助。