1 files changed, 175 insertions, 0 deletions
diff --git a/multiselectcombobox.cpp b/multiselectcombobox.cpp
new file mode 100644
index 0000000..e1fe324
--- /dev/null
+++ b/multiselectcombobox.cpp
@@ -0,0 +1,175 @@
+#include "multiselectcombobox.h"
+#include <QListView>
+#include <QMouseEvent>
+#include <QCheckBox>
+
+MultiSelectComboBox::MultiSelectComboBox(QWidget *parent)
+    : QComboBox(parent)
+    , suppressUpdate(false)
+{
+    model = new QStandardItemModel(this);
+    setModel(model);
+    
+    // Use list view for better checkbox display
+    QListView *listView = new QListView(this);
+    setView(listView);
+    
+    // Create a line edit to display the text (read-only)
+    displayLabel = new QLineEdit(this);
+    displayLabel->setReadOnly(true);
+    setLineEdit(displayLabel);
+    
+    // Install event filter to keep popup open on click
+    view()->viewport()->installEventFilter(this);
+    
+    connect(view(), &QAbstractItemView::pressed, this, &MultiSelectComboBox::onItemPressed);
+}
+
+void MultiSelectComboBox::addItem(const QString &text)
+{
+    // First item is "Select All"
+    if (model->rowCount() == 0) {
+        QStandardItem *selectAllItem = new QStandardItem("Select All");
+        selectAllItem->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
+        selectAllItem->setData(Qt::Checked, Qt::CheckStateRole);
+        selectAllItem->setData(true, Qt::UserRole); // Mark as "Select All" item
+        model->appendRow(selectAllItem);
+    }
+    
+    QStandardItem *item = new QStandardItem(text);
+    item->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled);
+    item->setData(Qt::Checked, Qt::CheckStateRole);
+    item->setData(false, Qt::UserRole); // Regular item
+    model->appendRow(item);
+}
+
+void MultiSelectComboBox::addItems(const QStringList &texts)
+{
+    for (const QString &text : texts) {
+        addItem(text);
+    }
+    updateText();
+}
+
+QStringList MultiSelectComboBox::getSelectedItems() const
+{
+    QStringList selected;
+    for (int i = 1; i < model->rowCount(); ++i) { // Skip "Select All" at index 0
+        QStandardItem *item = model->item(i);
+        if (item && item->checkState() == Qt::Checked) {
+            selected.append(item->text());
+        }
+    }
+    return selected;
+}
+
+void MultiSelectComboBox::setSelectedItems(const QStringList &items)
+{
+    suppressUpdate = true;
+    
+    for (int i = 1; i < model->rowCount(); ++i) { // Skip "Select All" at index 0
+        QStandardItem *item = model->item(i);
+        if (item) {
+            bool shouldCheck = items.contains(item->text());
+            item->setCheckState(shouldCheck ? Qt::Checked : Qt::Unchecked);
+        }
+    }
+    
+    // Update "Select All" checkbox
+    if (model->rowCount() > 1) {
+        QStandardItem *selectAllItem = model->item(0);
+        if (selectAllItem) {
+            selectAllItem->setCheckState(allSelected() ? Qt::Checked : Qt::Unchecked);
+        }
+    }
+    
+    suppressUpdate = false;
+    updateText();
+}
+
+bool MultiSelectComboBox::allSelected() const
+{
+    for (int i = 1; i < model->rowCount(); ++i) { // Skip "Select All" at index 0
+        QStandardItem *item = model->item(i);
+        if (item && item->checkState() == Qt::Unchecked) {
+            return false;
+        }
+    }
+    return model->rowCount() > 1;
+}
+
+void MultiSelectComboBox::clear()
+{
+    model->clear();
+    QComboBox::clear();
+}
+
+void MultiSelectComboBox::hidePopup()
+{
+    // Don't hide on item click - only when clicking outside
+    QComboBox::hidePopup();
+    updateText();
+    emit selectionChanged();
+}
+
+bool MultiSelectComboBox::eventFilter(QObject *watched, QEvent *event)
+{
+    if (watched == view()->viewport()) {
+        if (event->type() == QEvent::MouseButtonRelease) {
+            return true; // Prevent popup from closing
+        }
+    }
+    return QComboBox::eventFilter(watched, event);
+}
+
+void MultiSelectComboBox::onItemPressed(const QModelIndex &index)
+{
+    QStandardItem *item = model->itemFromIndex(index);
+    if (item) {
+        // Check if this is the "Select All" item
+        bool isSelectAll = item->data(Qt::UserRole).toBool();
+        
+        if (isSelectAll) {
+            // Toggle all items
+            Qt::CheckState newState = (item->checkState() == Qt::Checked) ? Qt::Unchecked : Qt::Checked;
+            suppressUpdate = true;
+            for (int i = 0; i < model->rowCount(); ++i) {
+                QStandardItem *childItem = model->item(i);
+                if (childItem) {
+                    childItem->setCheckState(newState);
+                }
+            }
+            suppressUpdate = false;
+        } else {
+            // Toggle individual item
+            Qt::CheckState newState = (item->checkState() == Qt::Checked) ? Qt::Unchecked : Qt::Checked;
+            item->setCheckState(newState);
+            
+            // Update "Select All" state
+            if (model->rowCount() > 1) {
+                QStandardItem *selectAllItem = model->item(0);
+                if (selectAllItem) {
+                    selectAllItem->setCheckState(allSelected() ? Qt::Checked : Qt::Unchecked);
+                }
+            }
+        }
+        updateText();
+    }
+}
+
+void MultiSelectComboBox::updateText()
+{
+    if (suppressUpdate) return;
+    
+    QStringList selected = getSelectedItems();
+    
+    if (selected.isEmpty()) {
+        displayLabel->setText("No Accounts");
+    } else if (allSelected()) {
+        displayLabel->setText("All Accounts");
+    } else if (selected.size() == 1) {
+        displayLabel->setText(selected.first());
+    } else {
+        displayLabel->setText(QString("%1 Accounts Selected").arg(selected.size()));
+    }
+}