KeyboardKey.qml

// This code is by Nathaniel van Diepen and used with permission.
// under the MIT license.
// https://github.com/Eeems/oxidize/blob/master/LICENSE.md

import QtQuick 2.9
import "."

Item {
    id: root
    clip: true
    property string text: ""
    property string shifttext: text
    property string alttext: text
    property string ctrltext: text
    property string metatext: text
    property string shiftalttext: shifttext
    property string shiftctrltext: shifttext
    property string shiftmetatext: shifttext
    property string altctrltext: alttext
    property string altmetatext: alttext
    property string ctrlmetatext: alttext
    property string shiftaltctrltext: shiftalttext
    property string shiftaltmetatext: shiftalttext
    property string shiftctrlmetatext: shiftctrltext
    property string shiftaltctrlmetatext: shiftalttext
    property bool repeatOnHold: true
    property int holdInterval: 100
    property int key: 0
    property string value: null
    property int size: 1
    property int basesize: 90
    property int fontsize: 8
    signal click(Item item)
    signal hold(Item item)
    signal release(Item item)
    property bool toggle: false
    width: size * basesize
    height: basesize
    function state() {
        return button.state;
    }
    function getText(){
        if(keyboard.hasShift && keyboard.hasAlt && keyboard.hasCtrl){
            return shiftaltctrltext;
        }
        if(keyboard.hasShift && keyboard.hasAlt){
            return shiftalttext;
        }
        if(keyboard.hasShift && keyboard.hasCtrl){
            return shiftctrltext;
        }
        if(keyboard.hasAlt && keyboard.hasCtrl){
            return altctrltext;
        }
        if(keyboard.hasShift){
            return shifttext;
        }
        if(keyboard.hasAlt){
            return alttext;
        }
        if(keyboard.hasCtrl){
            return ctrltext;
        }
        return text;
    }
    function doClick(){
        if(root.click(root) !== false){
            var modifiers = Qt.NoModifier;
            if(keyboard.hasShift){
                modifiers = modifiers | Qt.ShiftModifier;
            }
            if(keyboard.hasAlt){
                modifiers = modifiers | Qt.AltModifier;
            }
            if(keyboard.hasCtrl){
                modifiers = modifiers | Qt.ControlModifier;
            }
            if(keyboard.hasMeta){
                modifiers = modifiers | Qt.MetaModifier;
            }
            if(root.key > 0){
                keyboard.keyPress(root.key, modifiers, root.value);
            }else{
                var text = root.getText();
                if(text.length > 1){
                    keyboard.stringPress(text, modifiers, text);
                }else{
                    keyboard.charPress(text, modifiers);
                }
            }
            if(!root.toggle){
                if (!keyboard.hasCaps) {
                  keyboard.hasShift = false;
                }
                keyboard.hasAlt = false;
                keyboard.hasCtrl = false;
                keyboard.hasMeta =false;
            }
        }
    }
    Button {
        id: button
        text: root.getText()
        anchors.fill: parent
        fontsize: root.fontsize
        toggle: root.toggle
        color: "white"
        backgroundColor: "transparent"
        borderColor: "transparent"
        selectedColor: "black"
        selectedBackgroundColor: "white"
        selectedBorderColor: "white"
        borderwidth: 3
        onClick: root.doClick()
        onHold: {
            root.hold(this);
            root.repeatOnHold && timer.start();
        }
        onRelease: {
            root.release(this);
            root.repeatOnHold && timer.stop();
        }
    }
    Timer {
        id: timer
        repeat: true
        interval: root.holdInterval
        onTriggered: root.doClick()
    }
}