Finished with alternate search directories for location source file.

GDB has its notion of where source files live. Sometimes this is
incorrect as the source may be in a different place after the executable
is released.

Seer's source search feature is a list of alternate directories to look
in if the path that GDB knows of doesn't exist.

Use the Config dialog to set them. Then save the config.

This is a global feature. That is, it applies to any and all executables
being debugged. (Perhaps I'll add project based session files to handle
per executable settings).

src/SeerSourceConfigPage.cpp

@@ -1,5 +1,7 @@
 #include "SeerSourceConfigPage.h"
+#include <QtWidgets/QInputDialog>
 #include <QtWidgets/QWidget>
+#include <QtCore/QDebug>
 
 SeerSourceConfigPage::SeerSourceConfigPage(QWidget* parent) : QWidget(parent) {
 
@@ -7,10 +9,154 @@ SeerSourceConfigPage::SeerSourceConfigPage(QWidget* parent) : QWidget(parent) {
     setupUi(this);
 
     // Setup the widgets
+    directoriesTreeWidget->clear();
+    directoriesTreeWidget->setSortingEnabled(false);
+    directoriesTreeWidget->setSelectionMode(QAbstractItemView::ExtendedSelection);
+    directoriesTreeWidget->resizeColumnToContents(0); // directory
 
     // Connect things.
+    QObject::connect(addDirectoryToolButton,        &QToolButton::clicked,     this, &SeerSourceConfigPage::handleAddButtonClicked);
+    QObject::connect(moveUpDirectoriesToolButton,   &QToolButton::clicked,     this, &SeerSourceConfigPage::handleUpButtonClicked);
+    QObject::connect(moveDownDirectoriesToolButton, &QToolButton::clicked,     this, &SeerSourceConfigPage::handleDownButtonClicked);
+    QObject::connect(deleteDirectoriesToolButton,   &QToolButton::clicked,     this, &SeerSourceConfigPage::handleDeleteButtonClicked);
 }
 
 SeerSourceConfigPage::~SeerSourceConfigPage() {
 }
 
+void SeerSourceConfigPage::setAlternateDirectories (const QStringList& alternateDirectories) {
+
+    directoriesTreeWidget->clear();
+
+    QStringListIterator iter(alternateDirectories);
+
+    while (iter.hasNext()) {
+
+        QTreeWidgetItem* topItem = new QTreeWidgetItem;
+        topItem->setText(0, iter.next());
+
+        directoriesTreeWidget->addTopLevelItem(topItem);
+    }
+
+    directoriesTreeWidget->resizeColumnToContents(0);
+}
+
+QStringList SeerSourceConfigPage::alternateDirectories () const {
+
+    QStringList list;
+
+    QTreeWidgetItemIterator iter(directoriesTreeWidget);
+
+    while (*iter) {
+        list << (*iter)->text(0);
+        ++iter;
+    }
+
+    return list;
+}
+
+void SeerSourceConfigPage::handleAddButtonClicked () {
+
+    // Ask for the alternate directory to add to the list.
+    QString directory = QInputDialog::getText(this, "Seer", "Enter an alternate directory",  QLineEdit::Normal);
+
+    if (directory == "") {
+        return;
+    }
+
+    // Get the selected items, if any.
+    QList<QTreeWidgetItem*> matches = directoriesTreeWidget->selectedItems();
+
+    // Create the new item
+    QTreeWidgetItem* topItem = new QTreeWidgetItem;
+    topItem->setText(0, directory);
+
+    // If there is something selected, add the new item before the first selected item.
+    if (matches.count() > 0) {
+
+        int index = directoriesTreeWidget->indexOfTopLevelItem(matches[0]);
+
+        directoriesTreeWidget->insertTopLevelItem(index, topItem);
+
+    // Otherwise, just add it to the end of the list.
+    }else{
+        directoriesTreeWidget->addTopLevelItem(topItem);
+    }
+
+    // Resize the columns and select the item we just added.
+    directoriesTreeWidget->resizeColumnToContents(0);
+
+    directoriesTreeWidget->setCurrentItem(topItem, 0);
+}
+
+void SeerSourceConfigPage::handleUpButtonClicked () {
+
+    // Get the selected items.
+    QList<QTreeWidgetItem*> matches = directoriesTreeWidget->selectedItems();
+
+    // Loop through them from low to high.
+    for (int i=0; i<matches.count(); i++) {
+
+        int index = directoriesTreeWidget->indexOfTopLevelItem(matches[i]);
+
+        // Stop if the item is at the top of the list.
+        if (index <= 0) {
+            break;
+        }
+
+        // Steel it from the treeWidget.
+        QTreeWidgetItem* topItem = directoriesTreeWidget->takeTopLevelItem(index);
+
+        // Re-add it to the moved up position.
+        directoriesTreeWidget->insertTopLevelItem(index-1, topItem);
+    }
+
+    // Re-selected the items.
+    directoriesTreeWidget->clearSelection();
+    for (int i=0; i<matches.count(); i++) {
+        matches[i]->setSelected(true);
+    }
+
+    // Resize the columns.
+    directoriesTreeWidget->resizeColumnToContents(0);
+}
+
+void SeerSourceConfigPage::handleDownButtonClicked () {
+
+    // Get the selected items.
+    QList<QTreeWidgetItem*> matches = directoriesTreeWidget->selectedItems();
+
+    // Loop through them from high to low.
+    for (int i=matches.count()-1; i>=0; i--) {
+
+        int index = directoriesTreeWidget->indexOfTopLevelItem(matches[i]);
+
+        // Stop if the item is at the bottom of the list.
+        if (index >= directoriesTreeWidget->topLevelItemCount()-1) {
+            break;
+        }
+
+        // Steel it from the treeWidget.
+        QTreeWidgetItem* topItem = directoriesTreeWidget->takeTopLevelItem(index);
+
+        // Re-add it to the moved down position.
+        directoriesTreeWidget->insertTopLevelItem(index+1, topItem);
+    }
+
+    // Re-selected the items.
+    directoriesTreeWidget->clearSelection();
+    for (int i=0; i<matches.count(); i++) {
+        matches[i]->setSelected(true);
+    }
+
+    // Resize the columns.
+    directoriesTreeWidget->resizeColumnToContents(0);
+}
+
+void SeerSourceConfigPage::handleDeleteButtonClicked () {
+
+    QList<QTreeWidgetItem*> matches = directoriesTreeWidget->selectedItems();
+
+    qDeleteAll(matches);
+}
+