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一、Qt Widgets 问题交流
1.
二、Qt Quick 问题交流
1.MenuItem设置enable:false后没法更新hover样式
菜单有时候需要禁用某些选项，使之不可点击，但设置enable:false后就不会更新hover或者highlighted等状态了。可以保留enable:true，自定义过滤hover和点击事件，比如放一个MouseArea在上面拦截点击事件，同时过滤MenuItem的快捷键点击事件。
import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.Window 2.15// 菜单
Menu {id: controlproperty bool clickable: trueimplicitWidth: 100// 作为二级菜单，不可点击高度设置成0就不会展开了implicitHeight: clickable ? contentHeight : 0margins: 0bottomInset: 0topInset: 0leftInset: 0rightInset: 0padding: 1delegate: MyMenuItem {}contentItem: ListView {implicitHeight: contentHeightmodel: control.contentModelinteractive: Window.window ? contentHeight > Window.window.height : falseclip: truecurrentIndex: control.currentIndexScrollIndicator.vertical: ScrollIndicator {}}background: Rectangle {border.color: "black"}
}
import QtQuick 2.15
import QtQuick.Controls 2.15// 菜单项
MenuItem {id: control// 有子菜单就用子菜单的属性值property bool clickable: subMenu ? subMenu.clickable : trueimplicitWidth: 100implicitHeight: 30// 屏蔽快捷键点击Keys.onPressed: event.accepted = acceptKeyClick(event.key)Keys.onReleased: event.accepted = acceptKeyClick(event.key)function acceptKeyClick(key) {return !clickable && (key === Qt.Key_Space || key === Qt.Key_Return || key === Qt.Key_Enter)}contentItem: Text {readonly property real arrowPadding: (control.subMenu && control.arrow ? control.arrow.width: 0)readonly property real indicatorPadding: (control.indicator && control.indicator.visible ? control.indicator.width: 0)leftPadding: indicatorPaddingrightPadding: arrowPaddingtext: control.textcolor: enabled && clickable ? "red" : "gray"}background: Rectangle {color: highlighted ? "orange" : "white"}// 用MouseArea挡住就能保留hover状态且不可点击了MouseArea {anchors.fill: parenthoverEnabled: falsevisible: !clickable}
}
import QtQuick 2.15
import QtQuick.Window 2.15
import QtQuick.Controls 2.15Window {width: 640height: 480visible: truetitle: qsTr("GongJianBo")MyMenu {id: ctx_menuMyMenuItem {text: "A"}MyMenuItem {text: "B"// 自定义不可点击时也能处理hover/highlighted样式clickable: false}MyMenuItem {text: "C"// 设置enabled:false后不会更新hover/highlighted状态enabled: false}MenuSeparator {}MyMenu {title: "A"MyMenuItem {text: "A"}MyMenuItem {text: "B"}}MyMenu {title: "B"clickable: falseMyMenuItem {text: "A"}MyMenuItem {text: "B"}}MyMenu {title: "C"enabled: falseMyMenuItem {text: "A"}MyMenuItem {text: "B"}}}MouseArea {anchors.fill: parentacceptedButtons: Qt.RightButtononClicked: {ctx_menu.x = mouseXctx_menu.y = mouseYctx_menu.open()}}
}