Merge #12080: Add support to search the address book

c316fdf [qt] Add support to search the address book (João Barbosa)

Pull request description:

  This PR adds support to search the address book for both receiving and sending addresses.

  A specialisation of the `QSortFilterProxyModel` is added to implement the custom filtering.

  <img width="757" alt="screen shot 2018-01-03 at 16 05 57" src="https://user-images.githubusercontent.com/3534524/34528196-0347d61e-f0a0-11e7-9bd3-535e9e34ceb8.png">
  <img width="759" alt="screen shot 2018-01-03 at 16 00 58" src="https://user-images.githubusercontent.com/3534524/34528202-07c99f24-f0a0-11e7-8e34-cff6a1ba2364.png">

  Closes #623.

Tree-SHA512: 316e646015c858fc70db6be72dc7922d5bb10a3399e7fa327c992e184cc37a124f11cffefab2dbe0d16bda790c7c0437db364686e66c40b4054b8250b4be15d0

src/qt/addressbookpage.cpp

@@ -21,6 +21,41 @@
 #include <QMessageBox>
 #include <QSortFilterProxyModel>
 
+class AddressBookSortFilterProxyModel final : public QSortFilterProxyModel
+{
+    const QString m_type;
+
+public:
+    AddressBookSortFilterProxyModel(const QString& type, QObject* parent)
+        : QSortFilterProxyModel(parent)
+        , m_type(type)
+    {
+        setDynamicSortFilter(true);
+        setFilterCaseSensitivity(Qt::CaseInsensitive);
+        setSortCaseSensitivity(Qt::CaseInsensitive);
+    }
+
+protected:
+    bool filterAcceptsRow(int row, const QModelIndex& parent) const
+    {
+        auto model = sourceModel();
+        auto label = model->index(row, AddressTableModel::Label, parent);
+
+        if (model->data(label, AddressTableModel::TypeRole).toString() != m_type) {
+            return false;
+        }
+
+        auto address = model->index(row, AddressTableModel::Address, parent);
+
+        if (filterRegExp().indexIn(model->data(address).toString()) < 0 &&
+            filterRegExp().indexIn(model->data(label).toString()) < 0) {
+            return false;
+        }
+
+        return true;
+    }
+};
+
 AddressBookPage::AddressBookPage(const PlatformStyle *platformStyle, Mode _mode, Tabs _tab, QWidget *parent) :
     QDialog(parent),
     ui(new Ui::AddressBookPage),
@@ -113,24 +148,12 @@ void AddressBookPage::setModel(AddressTableModel *_model)
     if(!_model)
         return;
 
-    proxyModel = new QSortFilterProxyModel(this);
+    auto type = tab == ReceivingTab ? AddressTableModel::Receive : AddressTableModel::Send;
+    proxyModel = new AddressBookSortFilterProxyModel(type, this);
     proxyModel->setSourceModel(_model);
-    proxyModel->setDynamicSortFilter(true);
-    proxyModel->setSortCaseSensitivity(Qt::CaseInsensitive);
-    proxyModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
-    switch(tab)
-    {
-    case ReceivingTab:
-        // Receive filter
-        proxyModel->setFilterRole(AddressTableModel::TypeRole);
-        proxyModel->setFilterFixedString(AddressTableModel::Receive);
-        break;
-    case SendingTab:
-        // Send filter
-        proxyModel->setFilterRole(AddressTableModel::TypeRole);
-        proxyModel->setFilterFixedString(AddressTableModel::Send);
-        break;
-    }
+
+    connect(ui->searchLineEdit, SIGNAL(textChanged(QString)), proxyModel, SLOT(setFilterWildcard(QString)));
+
     ui->tableView->setModel(proxyModel);
     ui->tableView->sortByColumn(0, Qt::AscendingOrder);
 

src/qt/addressbookpage.h

@@ -7,6 +7,7 @@
 
 #include <QDialog>
 
+class AddressBookSortFilterProxyModel;
 class AddressTableModel;
 class PlatformStyle;
 
@@ -18,7 +19,6 @@ QT_BEGIN_NAMESPACE
 class QItemSelection;
 class QMenu;
 class QModelIndex;
-class QSortFilterProxyModel;
 QT_END_NAMESPACE
 
 /** Widget that shows a list of sending or receiving addresses.
@@ -53,7 +53,7 @@ private:
     Mode mode;
     Tabs tab;
     QString returnValue;
-    QSortFilterProxyModel *proxyModel;
+    AddressBookSortFilterProxyModel *proxyModel;
     QMenu *contextMenu;
     QAction *deleteAction; // to be able to explicitly disable it
     QString newAddressToSelect;

src/qt/forms/addressbookpage.ui

@@ -21,6 +21,13 @@
      </property>
     </widget>
    </item>
+   <item>
+    <widget class="QLineEdit" name="searchLineEdit">
+     <property name="placeholderText">
+      <string>Enter address or label to search</string>
+     </property>
+    </widget>
+   </item>
    <item>
     <widget class="QTableView" name="tableView">
      <property name="contextMenuPolicy">