ToolBarPageHeader.qml

/*
 *   Copyright 2018 Marco Martin <mart@kde.org>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Library General Public License as
 *   published by the Free Software Foundation; either version 2 or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU Library General Public License for more details
 *
 *   You should have received a copy of the GNU Library General Public
 *   License along with this program; if not, write to the
 *   Free Software Foundation, Inc.,
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

import QtQuick 2.5
import QtQuick.Controls 2.0 as Controls
import QtQuick.Layouts 1.2
import org.kde.kirigami 2.4
import "../" as Private


AbstractPageHeader {
    id: root

    implicitWidth: titleLoader.implicitWidth.width/2 + buttonTextMetrics.collapsedButtonsWidth
    Layout.minimumWidth: ctxActionsButton.width*4

    Layout.preferredHeight: Math.max(titleLoader.implicitHeight, actionsLayout.implicitHeight) + Units.smallSpacing * 2

    MouseArea {
        anchors.fill: parent
        onClicked: page.forceActiveFocus()
    }

    Loader {
        id: titleLoader

        anchors {
            verticalCenter: parent.verticalCenter
            left: parent.left
            right: actionsLayout.left
            leftMargin: Units.largeSpacing
            rightMargin: Units.smallSpacing
        }

        visible: width > item.Layout.minimumWidth

        sourceComponent: page ? page.titleDelegate : null

        Layout.preferredWidth: item
            ? (item.Layout.preferredWidth > 0 ? item.Layout.preferredWidth : item.implicitWidth)
            : 0
    }


    TextMetrics {
        id: buttonTextMetrics
        text: (page.actions.left ? page.actions.left.text : "") + (page.actions.main ? page.actions.main.text : "") + (page.actions.right ? page.actions.right.text : "")
        readonly property int collapsedButtonsWidth: ctxActionsButton.width + (page.actions.left ? ctxActionsButton.width + Units.gridUnit : 0) + (page.actions.main ? ctxActionsButton.width + Units.gridUnit : 0) + (page.actions.right ? ctxActionsButton.width + Units.gridUnit : 0)
        readonly property int requiredWidth: width + collapsedButtonsWidth
    }

    RowLayout {
        id: actionsLayout
        anchors {
            verticalCenter: parent.verticalCenter
            right: ctxActionsButton.visible ? ctxActionsButton.left : parent.right
        }

        readonly property bool toobig: root.width - root.leftPadding - root.rightPadding - titleLoader.implicitWidth - Units.gridUnit < buttonTextMetrics.requiredWidth

        Private.PrivateActionToolButton {
            Layout.alignment: Qt.AlignVCenter
            kirigamiAction: page && page.actions ? page.actions.left : null
            showText: !parent.toobig
        }
        Private.PrivateActionToolButton {
            Layout.alignment: Qt.AlignVCenter
            Layout.rightMargin: Units.smallSpacing
            kirigamiAction: page && page.actions ? page.actions.main : null
            showText: !parent.toobig
        }
        Private.PrivateActionToolButton {
            Layout.alignment: Qt.AlignVCenter
            kirigamiAction: page && page.actions ? page.actions.right : null
            showText: !parent.toobig
        }
    }

    Private.PrivateActionToolButton {
        id: ctxActionsButton
        showMenuArrow: page.actions.contextualActions.length == 1
        onMenuAboutToShow: page.contextualActionsAboutToShow();
        anchors {
            right: parent.right
            verticalCenter: parent.verticalCenter
            rightMargin: Units.smallSpacing
        }
        Action {
            id: overflowAction
            icon.name: "overflow-menu"
            tooltip: qsTr("More Actions")
            visible: visibleChildren.length > 0
            children: page && page.actions.contextualActions ? page.actions.contextualActions : null
        }

        kirigamiAction: page && page.actions.contextualActions.length === 1 ? page.actions.contextualActions[0] : overflowAction
    }
}