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CityModel/CityModel.pro

@@ -0,0 +1,20 @@
+#-------------------------------------------------
+#
+# Project created by QtCreator 2014-11-21T20:00:31
+#
+#-------------------------------------------------
+
+QT       += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = CityModel
+TEMPLATE = app
+
+
+SOURCES += main.cpp\
+        citymodel.cpp
+
+HEADERS  += citymodel.h
+
+FORMS    += citymodel.ui

CityModel/citymodel.cpp

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+#include "citymodel.h"
+#include "ui_citymodel.h"
+
+CityModel::CityModel(QObject *parent) :
+    QAbstractTableModel(parent),
+    ui(new Ui::CityModel)
+{
+}
+
+void CityModel::setCities(const QStringList &cityNames)
+{
+    cities = cityNames;
+    //用于存储城市之间的距离
+    distances.resize(cities.count() * (cities.count() - 1) / 2);
+    distances.fill(0);
+}
+
+int CityModel::rowCount(const QModelIndex & /* parent */) const
+{
+    return cities.count();
+}
+
+int CityModel::columnCount(const QModelIndex & /* parent */) const
+{
+    return cities.count();
+}
+
+QVariant CityModel::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid())
+        return QVariant();
+
+    //当为对其模式的时候，则对其table表
+    if (role == Qt::TextAlignmentRole) {
+        return int(Qt::AlignRight | Qt::AlignVCenter);
+    } else if (role == Qt::DisplayRole) {
+        //为同一个城市，则距离为0
+        if (index.row() == index.column())
+            return 0;
+        //得到不同城市之间的距离
+        int offset = offsetOf(index.row(), index.column());
+        return distances[offset];
+    }
+    return QVariant();
+}
+
+//用户编辑一项的时候，会触发setData
+bool CityModel::setData(const QModelIndex &index,
+                        const QVariant &value, int role)
+{
+    if (index.isValid() && index.row() != index.column()
+            && role == Qt::EditRole) {
+        int offset = offsetOf(index.row(), index.column());
+        distances[offset] = value.toInt();
+
+        //createIndex()函数用于产生一个模型索引。我们需要使用它获得主对角线另外一侧和当前
+        //正在被设置的项所对应项的模型索引，参数顺序是行号在列好之前，所以我们得颠倒一下顺序：column，row
+        QModelIndex transposedIndex = createIndex(index.column(),
+                                                  index.row());
+        //修改整个区域(index,index)来刷新界面
+        emit dataChanged(index, index);
+        emit dataChanged(transposedIndex, transposedIndex);
+        return true;
+    }
+    return false;
+}
+
+QVariant CityModel::headerData(int section,
+                               Qt::Orientation /* orientation */,
+                               int role) const
+{
+    if (role == Qt::DisplayRole)
+        return cities[section];
+    return QVariant();
+}
+
+Qt::ItemFlags CityModel::flags(const QModelIndex &index) const
+{
+    //只有不是同一个城市，才能编辑其距离
+    Qt::ItemFlags flags = QAbstractItemModel::flags(index);
+    if (index.row() != index.column())
+        flags |= Qt::ItemIsEditable;
+    return flags;
+}
+
+int CityModel::offsetOf(int row, int column) const
+{
+    if (row < column)
+        qSwap(row, column);
+    //二维数组的索引下标
+    return (row * (row - 1) / 2) + column;
+}

CityModel/citymodel.h

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+#ifndef CITYMODEL_H
+#define CITYMODEL_H
+
+#include <QAbstractTableModel>
+#include <QStringList>
+#include <QVector>
+
+namespace Ui {
+class CityModel;
+}
+
+class CityModel : public QAbstractTableModel
+{
+    Q_OBJECT
+
+public:
+    CityModel(QObject *parent = 0);
+
+    void setCities(const QStringList &cityNames);
+    int rowCount(const QModelIndex &parent) const;
+    int columnCount(const QModelIndex &parent) const;
+    QVariant data(const QModelIndex &index, int role) const;
+    bool setData(const QModelIndex &index, const QVariant &value,
+                 int role);
+    QVariant headerData(int section, Qt::Orientation orientation,
+                        int role) const;
+    Qt::ItemFlags flags(const QModelIndex &index) const;
+
+private:
+    int offsetOf(int row, int column) const;
+
+    //保存城市名
+    QStringList cities;
+    //保存不同城市之间的距离
+    QVector<int> distances;
+
+private:
+    Ui::CityModel *ui;
+};
+
+#endif // CITYMODEL_H

CityModel/citymodel.ui

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+<ui version="4.0">
+ <class>CityModel</class>
+ <widget class="QDialog" name="CityModel" >
+  <property name="geometry" >
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle" >
+   <string>CityModel</string>
+  </property>
+ </widget>
+ <layoutDefault spacing="6" margin="11" />
+ <pixmapfunction></pixmapfunction>
+ <resources/>
+ <connections/>
+</ui>

CityModel/main.cpp

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+#include "citymodel.h"
+#include <QApplication>
+#include <QTableView>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    QStringList cities;
+    cities << "Arvika" << "Boden" << "Eskilstuna" << "Falun"
+           << "Filipstad" << "Halmstad" << "Helsingborg" << "Karlstad"
+           << "Kiruna" << "Kramfors" << "Motala" << "Sandviken"
+           << "Skara" << "Stockholm" << "Sundsvall" << "Trelleborg";
+
+    CityModel cityModel;
+    cityModel.setCities(cities);
+
+    QTableView tableView;
+    tableView.setModel(&cityModel);
+    tableView.setAlternatingRowColors(true);
+    tableView.setWindowTitle(QObject::tr("Cities"));
+    tableView.show();
+
+    return a.exec();
+}

ColorListEditor/ColorListEditor.cpp

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+#include <QtWidgets>
+
+#include "colorlisteditor.h"
+
+ColorListEditor::ColorListEditor(QWidget *widget) : QComboBox(widget)
+{
+    populateList();
+}
+
+//返回所选择的数据---选择的数据存储在Qt::DecorationRole
+QColor ColorListEditor::color() const
+{
+    return qvariant_cast<QColor>(itemData(currentIndex(), Qt::DecorationRole));
+}
+
+//从Qt::DecorationRole中将选择到的颜色属性设置为当前的选项
+void ColorListEditor::setColor(QColor color)
+{
+    setCurrentIndex(findData(color, int(Qt::DecorationRole)));
+}
+
+//得到所有颜色属性并插入到列表框中
+void ColorListEditor::populateList()
+{
+    QStringList colorNames = QColor::colorNames();
+
+    for (int i = 0; i < colorNames.size(); ++i) {
+        QColor color(colorNames[i]);
+
+        insertItem(i, colorNames[i]);
+        setItemData(i, color, Qt::DecorationRole);
+    }
+}

ColorListEditor/ColorListEditor.h

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+#ifndef COLORLISTEDITOR_H
+#define COLORLISTEDITOR_H
+
+#include <QComboBox>
+
+class QColor;
+class QWidget;
+
+class ColorListEditor : public QComboBox
+{
+    Q_OBJECT
+    //自定义QColor属性
+    Q_PROPERTY(QColor color READ color WRITE setColor USER true)
+
+public:
+    ColorListEditor(QWidget *widget = 0);
+
+public:
+    QColor color() const;
+    void setColor(QColor c);
+
+private:
+    void populateList();
+};
+
+
+#endif // COLORLISTEDITOR_H

ColorListEditor/ColorListEditor.pro

@@ -0,0 +1,22 @@
+#-------------------------------------------------
+#
+# Project created by QtCreator 2014-11-23T14:06:15
+#
+#-------------------------------------------------
+
+QT       += core gui
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+TARGET = ColorListEditor
+TEMPLATE = app
+
+
+SOURCES += main.cpp\
+        window.cpp \
+    ColorListEditor.cpp
+
+HEADERS  += window.h \
+    ColorListEditor.h
+
+FORMS    += window.ui