128 lines
4.2 KiB
C++
128 lines
4.2 KiB
C++
/*****************************************************************************
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* Copyright (C) 2018-2019 NineChess authors
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*
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* Authors: liuweilhy <liuweilhy@163.com>
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* Calcitem <calcitem@outlook.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*
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* QListView派生类
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* 之所以要派生这个类，重载sizeHint函数
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* 只是为了让停靠栏（父窗口）在初始时不至于过宽难看
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* QDockWidget没有很好的控制初始大小的方法，resize函数没效果
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* 如果不用派生类，使用固定宽度也可以，如下所示
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* ui.listView->setFixedWidth(108);
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* 但调节停靠栏宽度后就不好看了
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*/
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#ifndef MANUALLISTVIEW
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#define MANUALLISTVIEW
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#include <QListView>
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#include <QMouseEvent>
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#include <QDebug>
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#include "config.h"
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class ManualListView : public QListView
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{
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Q_OBJECT
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public:
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ManualListView(QWidget *parent = nullptr) : QListView(parent), newEmptyRow(false)
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{
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Q_UNUSED(parent)
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}
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QSize sizeHint() const
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{
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QSize size = QListView::sizeHint();
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// 缺省宽度设为128，这样就不太宽了
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size.setWidth(128);
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return size;
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}
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signals:
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// 需要一个currentChanged信号，但默认没有，需要把这个槽改造成信号
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void currentChangedSignal(const QModelIndex ¤t, const QModelIndex &previous);
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protected slots:
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// 屏蔽掉双击编辑功能
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void mouseDoubleClickEvent(QMouseEvent *mouseEvent)
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{
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//屏蔽双击事件
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mouseEvent->accept();
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}
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void rowsInserted(const QModelIndex &parent, int start, int end)
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{
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Q_UNUSED(parent)
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Q_UNUSED(start)
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Q_UNUSED(end)
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newEmptyRow = true;
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}
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#if 0
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/* 本来重载rowsInserted函数用于在插入新行后自动选中最后一行，
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但是，在关联Model的insertRow执行后rowsInserted会被立即执行，
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此时，Model的setData还未被执行，会选中一个空行。
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所以不再采用这种方式，而是在控制模块中指定。*/
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void rowsInserted(const QModelIndex &parent, int start, int end) {
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// 调用父类函数，为使滚动条更新，否则scrollToBottom不能正确执行。
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QListView::rowsInserted(parent, start, end);
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QModelIndex id = model()->index(end, 0);
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setCurrentIndex(id);
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scrollToBottom();
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}
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#endif
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// 采用判断最后一个元素是否改变来选中之
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void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight,
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const QVector<int> &roles = QVector<int>())
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{
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// 调用父类默认函数
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QListView::dataChanged(topLeft, bottomRight, roles);
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// 如果包含model
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if (model()) {
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// 判断
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QModelIndex index = model()->index(model()->rowCount() - 1, 0);
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if (index == bottomRight && newEmptyRow) {
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setCurrentIndex(index);
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QAbstractItemView::scrollToBottom();
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newEmptyRow = false;
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}
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}
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}
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// 需要一个currentChanged信号，但默认没有，需要把这个槽改造成信号
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// activated信号需要按下回车才发出，selectedChanged和clicked信号也不合适
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void currentChanged(const QModelIndex ¤t, const QModelIndex &previous)
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{
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QListView::currentChanged(current, previous);
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emit currentChangedSignal(current, previous);
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}
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private:
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// 添加了新空行的标识
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bool newEmptyRow;
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};
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#endif // MANUALLISTVIEW
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