Implement multiselect mode

This can be triggered with the common Ctrl+Click keybinding.

Author: vimpostor

src/Models/path_model.cpp

@@ -1,5 +1,7 @@
 #include "path_model.hpp"
 
+#include <ranges>
+
 #include "backend.hpp"
 #include "path_registry.hpp"
 #include "settings.hpp"
@@ -25,6 +27,8 @@ QVariant PathModel::data(const QModelIndex &index, int role) const {
 		return QString::fromStdString(p.pretty_print());
 	case UsedRole:
 		return p.used;
+	case MultiselectRole:
+		return p.multiselect;
 	case IconRole:
 		return QString::fromStdString(p.iconName);
 	case ThumbnailRole:
@@ -52,8 +56,17 @@ void PathModel::taint_all_used() {
 	check_should_quit();
 }
 
+void PathModel::multiselect(int i) {
+	paths[i].multiselect = !paths[i].multiselect;
+	multiselected += (2 * paths[i].multiselect) - 1;
+	emit dataChanged(index(i, 0), index(i, 0));
+	refresh_folded_paths();
+}
+
 void PathModel::refresh_folded_paths() {
-	folded_uri_list = std::accumulate(paths.cbegin(), paths.cend(), QString(), [&](QString s, const auto p) { return s.append(QString::fromStdString(p.get_uri()) + "\n"); });
+	// only add multiselected items in multiselect mode
+	auto v = paths | std::views::filter([&](const auto &i) { return !multiselected || i.multiselect; });
+	folded_uri_list = std::accumulate(v.cbegin(), v.cend(), QString(), [](QString s, const auto p) { return s.append(QString::fromStdString(p.get_uri()) + "\n"); });
 	emit foldedUriListChanged(folded_uri_list);
 }
 

src/Models/path_model.hpp

@@ -12,15 +12,17 @@ class PathModel : public QAbstractListModel {
 	QML_SINGLETON
 
 	Q_PROPERTY(QString foldedUriList MEMBER folded_uri_list NOTIFY foldedUriListChanged)
+	Q_PROPERTY(int multiSelected MEMBER multiselected NOTIFY foldedUriListChanged)
 public:
-	PathModel(QObject *parent = nullptr);
+	explicit PathModel(QObject *parent = nullptr);
 
 	virtual int rowCount(const QModelIndex &) const override;
 	virtual QVariant data(const QModelIndex &index, int role) const override;
 	virtual QHash<int, QByteArray> roleNames() const override;
 
 	Q_INVOKABLE void taint_used(int i);
 	Q_INVOKABLE void taint_all_used();
+	Q_INVOKABLE void multiselect(int i);
 	Q_INVOKABLE void refresh_folded_paths();
 	Q_INVOKABLE void open(int i) const;
 	Q_INVOKABLE void finish_init();
@@ -33,12 +35,14 @@ class PathModel : public QAbstractListModel {
 		UriRole,
 		PrettyRole,
 		UsedRole,
+		MultiselectRole,
 		IconRole,
 		ThumbnailRole,
 		ExistsRole,
 	};
-	QHash<int, QByteArray> role_names {{PathRole, "path"}, {UriRole, "uri"}, {PrettyRole, "pretty"}, {UsedRole, "used"}, {IconRole, "iconName"}, {ThumbnailRole, "thumbnail"}, {ExistsRole, "exists"}};
+	QHash<int, QByteArray> role_names {{PathRole, "path"}, {UriRole, "uri"}, {PrettyRole, "pretty"}, {UsedRole, "used"}, {MultiselectRole, "multiselect"}, {IconRole, "iconName"}, {ThumbnailRole, "thumbnail"}, {ExistsRole, "exists"}};
 	std::vector<Path> paths;
 	QString folded_uri_list;
+	int multiselected = 0;
 	void check_should_quit();
 };

src/path.hpp

@@ -12,6 +12,7 @@ class Path {
 	QUrl thumbnail;
 	bool exists = false;
 	std::string iconName;
+	bool multiselect = false;
 
 	std::string get_uri() const;
 	QUrl get_url() const;

src/qml/PathView.qml

@@ -17,7 +17,7 @@ ListView {
 		Behavior on height { NumberAnimation { duration: 300; easing.type: Easing.InOutSine }}
 		visible: pathView.count > 1
 		highlighted: true
-		text: "Drag all " + pathView.count + " items"
+		text: "Drag all " + (PathModel.multiSelected ? PathModel.multiSelected : pathView.count) + " items"
 		Button {
 			id: dragallDummy
 			visible: false
@@ -93,8 +93,9 @@ ListView {
 			Rectangle {
 				id: usedIndicator
 				anchors { right: parent.right; top: parent.top; bottom: parent.bottom }
-				width: 8
+				width: 8 + multiselect * 40
 				color: used ? Material.primary : exists ? Material.color(Material.Grey) : Material.color(Material.Red)
+				Behavior on width { NumberAnimation { duration: 200; easing.type: Easing.InOutSine }}
 				Behavior on color { ColorAnimation { duration: 200; easing.type: Easing.InOutSine }}
 			}
 		}
@@ -105,7 +106,13 @@ ListView {
 			dragUri: uri
 			hoverEnabled: true
 			acceptedButtons: Qt.LeftButton | Qt.RightButton
-			onClicked: PathModel.open(index);
+			onClicked: (ev) => {
+				if (ev.modifiers & Qt.ControlModifier) {
+					PathModel.multiselect(index);
+				} else {
+					PathModel.open(index);
+				}
+			}
 			onDragStarted: {
 				Settings.alwaysOnBottom = true;
 				pathView.dragActive = true;