Implement proportional column resizing for Addressbook with memory

This is similar to gridcoin-community#2520.

Author: jamescowens

src/qt/addressbookpage.cpp

@@ -26,6 +26,9 @@ AddressBookPage::AddressBookPage(Mode mode, Tabs tab, QWidget* parent)
              , optionsModel(nullptr)
              , mode(mode)
              , tab(tab)
+             , m_table_column_sizes({150, 100})
+             , m_init_column_sizes_set(false)
+             , m_resize_columns_in_progress(false)
 {
     ui->setupUi(this);
 
@@ -102,6 +105,9 @@ AddressBookPage::AddressBookPage(Mode mode, Tabs tab, QWidget* parent)
 
     // Pass through accept action from button box
     connect(ui->okayButtonBox, &QDialogButtonBox::accepted, this, &QDialog::accept);
+
+    connect(ui->tableView->horizontalHeader(), &QHeaderView::sectionResized,
+                    this, &AddressBookPage::addressBookSectionResized);
 }
 
 AddressBookPage::~AddressBookPage()
@@ -144,11 +150,6 @@ void AddressBookPage::setModel(AddressTableModel *model)
     ui->tableView->setModel(filterProxyModel);
     ui->tableView->sortByColumn(0, Qt::AscendingOrder);
 
-    // Set column widths
-    ui->tableView->horizontalHeader()->setSectionResizeMode(AddressTableModel::Label, QHeaderView::Stretch);
-    ui->tableView->horizontalHeader()->setSectionResizeMode(AddressTableModel::Address, QHeaderView::ResizeToContents);
-    ui->tableView->horizontalHeader()->resizeSection(AddressTableModel::Address, 320);
-
     connect(ui->tableView->selectionModel(), &QItemSelectionModel::selectionChanged,
             this, &AddressBookPage::selectionChanged);
 
@@ -388,3 +389,91 @@ void AddressBookPage::selectNewAddress(const QModelIndex &parent, int begin, int
         newAddressToSelect.clear();
     }
 }
+
+void AddressBookPage::resizeTableColumns(const bool& neighbor_pair_adjust, const int& index,
+                                         const int& old_size, const int& new_size)
+{
+    // This prevents unwanted recursion to here from addressBookSectionResized.
+    m_resize_columns_in_progress = true;
+
+    if (!model) {
+        m_resize_columns_in_progress = false;
+
+        return;
+    }
+
+    if (!m_init_column_sizes_set) {
+        for (int i = 0; i < (int) m_table_column_sizes.size(); ++i) {
+            ui->tableView->horizontalHeader()->resizeSection(i, m_table_column_sizes[i]);
+        }
+
+        m_init_column_sizes_set = true;
+        m_resize_columns_in_progress = false;
+
+        return;
+    }
+
+    if (neighbor_pair_adjust) {
+        if (index != AddressTableModel::all_ColumnIndex.size() - 1) {
+            int new_neighbor_section_size = ui->tableView->horizontalHeader()->sectionSize(index + 1)
+                    + old_size - new_size;
+
+            ui->tableView->horizontalHeader()->resizeSection(
+                        index + 1, new_neighbor_section_size);
+
+            // This detects and deals with the case where the resize of a column tries to force the neighbor
+            // to a size below its minimum, in which case we have to reverse out the attempt.
+            if (ui->tableView->horizontalHeader()->sectionSize(index + 1)
+                    != new_neighbor_section_size) {
+                ui->tableView->horizontalHeader()->resizeSection(
+                            index,
+                            ui->tableView->horizontalHeader()->sectionSize(index)
+                            + new_neighbor_section_size
+                            - ui->tableView->horizontalHeader()->sectionSize(index + 1));
+            }
+        } else {
+            // Do not allow the last column to be resized because there is no adjoining neighbor to the right
+            // and we are maintaining the total width fixed to the size of the containing frame.
+            ui->tableView->horizontalHeader()->resizeSection(index, old_size);
+        }
+
+        m_resize_columns_in_progress = false;
+
+        return;
+    }
+
+    // This is the proportional resize case when the window is resized or the receive or favorites icon button is pressed.
+    const int width = ui->tableView->horizontalHeader()->width() - 5;
+
+    int orig_header_width = 0;
+
+    for (const auto& iter : AddressTableModel::all_ColumnIndex) {
+        orig_header_width += ui->tableView->horizontalHeader()->sectionSize(iter);
+    }
+
+    if (!width || !orig_header_width) return;
+
+    for (const auto& iter : AddressTableModel::all_ColumnIndex) {
+        int section_size = ui->tableView->horizontalHeader()->sectionSize(iter);
+
+        ui->tableView->horizontalHeader()->resizeSection(
+                    iter, section_size * width / orig_header_width);
+    }
+
+    m_resize_columns_in_progress = false;
+}
+
+void AddressBookPage::resizeEvent(QResizeEvent *event)
+{
+    resizeTableColumns();
+
+    QWidget::resizeEvent(event);
+}
+
+void AddressBookPage::addressBookSectionResized(int index, int old_size, int new_size)
+{
+    // Avoid implicit recursion between resizeTableColumns and addressBookSectionResized
+    if (m_resize_columns_in_progress) return;
+
+    resizeTableColumns(true, index, old_size, new_size);
+}

src/qt/addressbookpage.h

@@ -45,6 +45,11 @@ public slots:
     void done(int retval);
     void exportClicked();
     void changeFilter(const QString& needle);
+    void resizeTableColumns(const bool& neighbor_pair_adjust = false, const int& index = 0,
+                            const int& old_size = 0, const int& new_size = 0);
+
+protected:
+    void resizeEvent(QResizeEvent *event) override;
 
 private:
     Ui::AddressBookPage *ui;
@@ -59,6 +64,10 @@ public slots:
     QAction *deleteAction;
     QString newAddressToSelect;
 
+    std::vector<int> m_table_column_sizes;
+    bool m_init_column_sizes_set;
+    bool m_resize_columns_in_progress;
+
 private slots:
     void on_deleteButton_clicked();
     void on_newAddressButton_clicked();
@@ -79,6 +88,9 @@ private slots:
     /** New entry/entries were added to address table */
     void selectNewAddress(const QModelIndex &parent, int begin, int end);
 
+    /** Resize address book table columns based on incoming signal */
+    void addressBookSectionResized(int index, int old_size, int new_size);
+
 signals:
     void signMessage(QString addr);
     void verifyMessage(QString addr);

src/qt/addresstablemodel.h

@@ -25,6 +25,8 @@ class AddressTableModel : public QAbstractTableModel
         Address = 1  /**< Bitcoin address */
     };
 
+    static constexpr std::initializer_list<ColumnIndex> all_ColumnIndex = {Label, Address};
+
     enum RoleIndex {
         TypeRole = Qt::UserRole /**< Type of address (#Send or #Receive) */
     };

src/qt/bitcoingui.cpp

@@ -1433,6 +1433,8 @@ void BitcoinGUI::gotoAddressBookPage()
     addressBookAction->setChecked(true);
     centralWidget->setCurrentWidget(addressBookPage);
 
+    addressBookPage->resizeTableColumns();
+
     exportAction->setEnabled(true);
     disconnect(exportAction, &QAction::triggered, nullptr, nullptr);
     connect(exportAction, &QAction::triggered, addressBookPage, &FavoritesPage::exportClicked);
@@ -1443,6 +1445,8 @@ void BitcoinGUI::gotoReceiveCoinsPage()
     receiveCoinsAction->setChecked(true);
     centralWidget->setCurrentWidget(receiveCoinsPage);
 
+    receiveCoinsPage->resizeTableColumns();
+
     exportAction->setEnabled(true);
     disconnect(exportAction, &QAction::triggered, nullptr, nullptr);
     connect(exportAction, &QAction::triggered, receiveCoinsPage, &ReceiveCoinsPage::exportClicked);

src/qt/favoritespage.cpp

@@ -62,3 +62,10 @@ void FavoritesPage::updateIcons(const QString& theme)
 {
     filterLineEditIconAction->setIcon(QIcon(":/icons/" + theme + "_search"));
 }
+
+void FavoritesPage::resizeTableColumns()
+{
+    if (addressBookPage) {
+        addressBookPage->resizeTableColumns();
+    }
+}

src/qt/favoritespage.h

@@ -31,6 +31,8 @@ class FavoritesPage : public QWidget
     void setAddressTableModel(AddressTableModel* model);
     void setOptionsModel(OptionsModel* model);
 
+    void resizeTableColumns();
+
 private:
     Ui::FavoritesPage* ui;
     AddressBookPage* addressBookPage;

src/qt/receivecoinspage.cpp

@@ -62,3 +62,11 @@ void ReceiveCoinsPage::updateIcons(const QString& theme)
 {
     filterLineEditIconAction->setIcon(QIcon(":/icons/" + theme + "_search"));
 }
+
+
+void ReceiveCoinsPage::resizeTableColumns()
+{
+    if (addressBookPage) {
+        addressBookPage->resizeTableColumns();
+    }
+}

src/qt/receivecoinspage.h

@@ -33,6 +33,8 @@ class ReceiveCoinsPage : public QWidget
     void setAddressTableModel(AddressTableModel *model);
     void setOptionsModel(OptionsModel *model);
 
+    void resizeTableColumns();
+
 private:
     Ui::ReceiveCoinsPage *ui;
     AddressBookPage *addressBookPage;