Ajouter la réinitialisation de la disposition du graphe

include/views/main_window.h

@@ -91,6 +91,15 @@ typedef void (*MainWindowGraphNodeMovedCallback)(
     gpointer user_data
 );
 
+/**
+ * @brief Callback appelé lors d'une demande de réinitialisation du graphe.
+ *
+ * @param user_data Données privées du callback.
+ */
+typedef void (*MainWindowResetGraphLayoutCallback)(
+    gpointer user_data
+);
+
 /**
  * @brief Définit le callback de vérification d'une preuve.
  *
@@ -121,6 +130,21 @@ void main_window_set_graph_node_moved_callback(
     gpointer user_data
 );
 
+/**
+ * @brief Définit le callback de demande de réinitialisation du graphe.
+ *
+ * MainWindow relaie uniquement la demande provenant du Workspace.
+ *
+ * @param main_window Fenêtre principale.
+ * @param callback Callback facultatif.
+ * @param user_data Données privées transmises au callback.
+ */
+void main_window_set_reset_graph_layout_callback(
+    MainWindow *main_window,
+    MainWindowResetGraphLayoutCallback callback,
+    gpointer user_data
+);
+
 /**
  * @brief Définit le callback du bouton « Nouvelle enquête ».
  *
@@ -320,6 +344,17 @@ void main_window_clear_graph(
     MainWindow *main_window
 );
 
+/**
+ * @brief Reconstruit visuellement la disposition automatique du graphe.
+ *
+ * Cette fonction ne modifie pas SQLite.
+ *
+ * @param main_window Fenêtre principale.
+ */
+void main_window_reset_graph_layout(
+    MainWindow *main_window
+);
+
 /**
  * @brief Met à jour le texte de la barre d'état.
  *

include/widgets/workspace.h

@@ -54,6 +54,18 @@ typedef void (*WorkspaceGraphNodeMovedCallback)(
     gpointer user_data
 );
 
+/**
+ * @brief Callback appelé lors d'une demande de réinitialisation du graphe.
+ *
+ * Le Workspace ne modifie ni SQLite ni le modèle de disposition. Il relaie
+ * uniquement la demande vers la couche applicative.
+ *
+ * @param user_data Données empruntées fournies par l'appelant.
+ */
+typedef void (*WorkspaceResetGraphLayoutCallback)(
+    gpointer user_data
+);
+
 /**
  * @brief Crée une nouvelle zone de travail.
  *
@@ -134,6 +146,21 @@ void workspace_set_graph_node_moved_callback(
     gpointer user_data
 );
 
+/**
+ * @brief Définit le callback de demande de réinitialisation du graphe.
+ *
+ * Le Workspace emprunte callback et user_data.
+ *
+ * @param workspace Zone de travail.
+ * @param callback Callback facultatif.
+ * @param user_data Données empruntées transmises au callback.
+ */
+void workspace_set_reset_graph_layout_callback(
+    Workspace *workspace,
+    WorkspaceResetGraphLayoutCallback callback,
+    gpointer user_data
+);
+
 /**
  * @brief Affiche l'état de chargement du graphe.
  *
@@ -187,6 +214,21 @@ void workspace_clear_graph(
     Workspace *workspace
 );
 
+/**
+ * @brief Reconstruit visuellement la disposition automatique du graphe.
+ *
+ * Cette fonction ne touche ni SQLite ni InvestigationGraphLayout. Elle doit
+ * être appelée par la couche applicative uniquement après la suppression
+ * réussie des positions persistées.
+ *
+ * Le zoom et le déplacement global du canvas sont conservés.
+ *
+ * @param workspace Zone de travail.
+ */
+void workspace_reset_graph_layout(
+    Workspace *workspace
+);
+
 /**
  * @brief Libère la structure Workspace.
  *

src/core/application.c

@@ -4277,6 +4277,131 @@ static void application_on_graph_node_moved(
     );
 }
 
+/**
+ * @brief Ferme proprement l'application.
+ *
+ * @param user_data Pointeur vers Application.
+ */
+static void application_on_reset_graph_layout_requested(
+    gpointer user_data
+)
+{
+    Application *application =
+        user_data;
+
+    Database *database =
+        NULL;
+
+    GraphNodePositionDao *position_dao =
+        NULL;
+
+    GError *error =
+        NULL;
+
+    if (application == NULL ||
+        application->main_window == NULL ||
+        application->session == NULL ||
+        application->graph_model == NULL ||
+        application->graph_layout == NULL)
+    {
+        return;
+    }
+
+    database =
+        investigation_session_get_database(
+            application->session
+        );
+
+    if (database == NULL)
+    {
+        application_present_error(
+            application,
+            "Réinitialisation impossible",
+            "La session ne fournit aucune connexion SQLite."
+        );
+
+        return;
+    }
+
+    position_dao =
+        graph_node_position_dao_new(
+            database,
+            &error
+        );
+
+    if (position_dao == NULL)
+    {
+        g_warning(
+            "Impossible de créer le DAO des positions : %s",
+            error != NULL
+                ? error->message
+                : "erreur inconnue"
+        );
+
+        application_present_error(
+            application,
+            "Réinitialisation impossible",
+            error != NULL
+                ? error->message
+                : "Impossible d'accéder aux positions enregistrées."
+        );
+
+        g_clear_error(
+            &error
+        );
+
+        return;
+    }
+
+    if (!graph_node_position_dao_delete_all(
+            position_dao,
+            &error
+        ))
+    {
+        g_warning(
+            "Impossible de supprimer les positions du graphe : %s",
+            error != NULL
+                ? error->message
+                : "erreur inconnue"
+        );
+
+        application_present_error(
+            application,
+            "Réinitialisation impossible",
+            error != NULL
+                ? error->message
+                : "Les positions enregistrées n'ont pas pu être supprimées."
+        );
+
+        g_clear_error(
+            &error
+        );
+
+        graph_node_position_dao_free(
+            position_dao
+        );
+
+        return;
+    }
+
+    graph_node_position_dao_free(
+        position_dao
+    );
+
+    investigation_graph_layout_clear(
+        application->graph_layout
+    );
+
+    main_window_reset_graph_layout(
+        application->main_window
+    );
+
+    main_window_set_status(
+        application->main_window,
+        "Disposition du graphe réinitialisée."
+    );
+}
+
 /**
  * @brief Ferme proprement l'application.
  *
@@ -4373,6 +4498,12 @@ static void application_on_activate(
         application
     );
 
+    main_window_set_reset_graph_layout_callback(
+        application->main_window,
+        application_on_reset_graph_layout_requested,
+        application
+    );
+
     main_window_set_new_investigation_callback(
         application->main_window,
         application_on_new_investigation_requested,

src/views/main_window.c

@@ -98,6 +98,12 @@ struct MainWindow
     gpointer
         graph_node_moved_user_data;
 
+    MainWindowResetGraphLayoutCallback
+        reset_graph_layout_callback;
+
+    gpointer
+        reset_graph_layout_user_data;
+
     MainWindowQuitCallback
         quit_callback;
 
@@ -287,6 +293,27 @@ static void main_window_on_graph_node_moved(
     );
 }
 
+/**
+ * @brief Relaie la demande de vérification provenant du Workspace.
+ */
+static void main_window_on_reset_graph_layout_requested(
+    gpointer user_data
+)
+{
+    MainWindow *main_window =
+        user_data;
+
+    if (main_window == NULL ||
+        main_window->reset_graph_layout_callback == NULL)
+    {
+        return;
+    }
+
+    main_window->reset_graph_layout_callback(
+        main_window->reset_graph_layout_user_data
+    );
+}
+
 /**
  * @brief Relaie la demande de vérification provenant du Workspace.
  */
@@ -556,6 +583,12 @@ MainWindow *main_window_new(
         main_window
     );
 
+    workspace_set_reset_graph_layout_callback(
+        main_window->workspace,
+        main_window_on_reset_graph_layout_requested,
+        main_window
+    );
+
     workspace_widget = workspace_get_widget(
         main_window->workspace
     );
@@ -957,6 +990,20 @@ void main_window_clear_graph(
     );
 }
 
+void main_window_reset_graph_layout(
+    MainWindow *main_window
+)
+{
+    if (main_window == NULL)
+    {
+        return;
+    }
+
+    workspace_reset_graph_layout(
+        main_window->workspace
+    );
+}
+
 void main_window_set_status(
     MainWindow *main_window,
     const char *status_text
@@ -1119,6 +1166,24 @@ void main_window_set_graph_node_moved_callback(
         user_data;
 }
 
+void main_window_set_reset_graph_layout_callback(
+    MainWindow *main_window,
+    MainWindowResetGraphLayoutCallback callback,
+    gpointer user_data
+)
+{
+    if (main_window == NULL)
+    {
+        return;
+    }
+
+    main_window->reset_graph_layout_callback =
+        callback;
+
+    main_window->reset_graph_layout_user_data =
+        user_data;
+}
+
 void main_window_set_quit_callback(
     MainWindow *main_window,
     MainWindowQuitCallback callback,
@@ -1241,12 +1306,24 @@ void main_window_free(
             NULL
         );
 
+        workspace_set_reset_graph_layout_callback(
+            main_window->workspace,
+            NULL,
+            NULL
+        );
+
         main_window->graph_node_moved_callback =
             NULL;
 
         main_window->graph_node_moved_user_data =
             NULL;
 
+        main_window->reset_graph_layout_callback =
+            NULL;
+
+        main_window->reset_graph_layout_user_data =
+            NULL;
+
         main_window_clear_graph(
             main_window
         );

src/widgets/workspace.c

@@ -47,6 +47,8 @@ struct Workspace
     GtkWidget *graph_details_label;
 
     GtkWidget *graph_view_page;
+    GtkWidget *graph_toolbar;
+    GtkWidget *reset_graph_layout_button;
 
     InvestigationGraphView *graph_view;
     EntityDetailsPanel *entity_details_panel;
@@ -83,6 +85,12 @@ struct Workspace
     gpointer
         graph_node_moved_user_data;
 
+    WorkspaceResetGraphLayoutCallback
+        reset_graph_layout_callback;
+
+    gpointer
+        reset_graph_layout_user_data;
+
     GtkWidget *node_name_label;
     GtkWidget *node_path_label;
     GtkWidget *node_type_label;
@@ -380,6 +388,32 @@ static void workspace_show_default(
     }
 }
 
+/**
+ * @brief Transmet la demande de vérification de la preuve affichée.
+ */
+static void workspace_on_reset_graph_layout_clicked(
+    GtkButton *button,
+    gpointer user_data
+)
+{
+    Workspace *workspace =
+        user_data;
+
+    (void) button;
+
+    if (workspace == NULL ||
+        workspace->graph_state != WORKSPACE_GRAPH_STATE_READY ||
+        workspace->graph_model == NULL ||
+        workspace->reset_graph_layout_callback == NULL)
+    {
+        return;
+    }
+
+    workspace->reset_graph_layout_callback(
+        workspace->reset_graph_layout_user_data
+    );
+}
+
 /**
  * @brief Transmet la demande de vérification de la preuve affichée.
  */
@@ -1048,6 +1082,98 @@ Workspace *workspace_new(void)
         )
     );
 
+    workspace->graph_toolbar =
+        gtk_box_new(
+            GTK_ORIENTATION_HORIZONTAL,
+            4
+        );
+
+    workspace->reset_graph_layout_button =
+        gtk_button_new_from_icon_name(
+            "view-refresh-symbolic"
+        );
+
+    if (workspace->graph_toolbar == NULL ||
+        workspace->reset_graph_layout_button == NULL)
+    {
+        workspace_free(
+            workspace
+        );
+
+        return NULL;
+    }
+
+    gtk_widget_set_halign(
+        workspace->graph_toolbar,
+        GTK_ALIGN_START
+    );
+
+    gtk_widget_set_valign(
+        workspace->graph_toolbar,
+        GTK_ALIGN_START
+    );
+
+    gtk_widget_set_margin_start(
+        workspace->graph_toolbar,
+        12
+    );
+
+    gtk_widget_set_margin_top(
+        workspace->graph_toolbar,
+        12
+    );
+
+    gtk_widget_add_css_class(
+        workspace->graph_toolbar,
+        "toolbar"
+    );
+
+    gtk_widget_add_css_class(
+        workspace->reset_graph_layout_button,
+        "flat"
+    );
+
+    gtk_widget_set_tooltip_text(
+        workspace->reset_graph_layout_button,
+        "Réinitialiser la disposition du graphe"
+    );
+
+    gtk_widget_set_sensitive(
+        workspace->reset_graph_layout_button,
+        FALSE
+    );
+
+    g_signal_connect(
+        workspace->reset_graph_layout_button,
+        "clicked",
+        G_CALLBACK(
+            workspace_on_reset_graph_layout_clicked
+        ),
+        workspace
+    );
+
+    gtk_box_append(
+        GTK_BOX(
+            workspace->graph_toolbar
+        ),
+        workspace->reset_graph_layout_button
+    );
+
+    gtk_overlay_add_overlay(
+        GTK_OVERLAY(
+            workspace->graph_view_page
+        ),
+        workspace->graph_toolbar
+    );
+
+    gtk_overlay_set_clip_overlay(
+        GTK_OVERLAY(
+            workspace->graph_view_page
+        ),
+        workspace->graph_toolbar,
+        TRUE
+    );
+
     gtk_overlay_add_overlay(
         GTK_OVERLAY(
             workspace->graph_view_page
@@ -1458,6 +1584,11 @@ void workspace_set_graph_loading(
     workspace->graph_state =
         WORKSPACE_GRAPH_STATE_LOADING;
 
+    gtk_widget_set_sensitive(
+        workspace->reset_graph_layout_button,
+        FALSE
+    );
+
     gtk_label_set_text(
         GTK_LABEL(
             workspace->graph_title_label
@@ -1548,6 +1679,11 @@ void workspace_set_graph(
     workspace->graph_state =
         WORKSPACE_GRAPH_STATE_READY;
 
+    gtk_widget_set_sensitive(
+        workspace->reset_graph_layout_button,
+        TRUE
+    );
+
     gtk_spinner_stop(
         GTK_SPINNER(
             workspace->graph_spinner
@@ -1618,6 +1754,11 @@ void workspace_set_graph_error(
     workspace->graph_state =
         WORKSPACE_GRAPH_STATE_ERROR;
 
+    gtk_widget_set_sensitive(
+        workspace->reset_graph_layout_button,
+        FALSE
+    );
+
     gtk_spinner_stop(
         GTK_SPINNER(
             workspace->graph_spinner
@@ -1690,6 +1831,11 @@ void workspace_clear_graph(
     workspace->graph_state =
         WORKSPACE_GRAPH_STATE_EMPTY;
 
+    gtk_widget_set_sensitive(
+        workspace->reset_graph_layout_button,
+        FALSE
+    );
+
     gtk_spinner_stop(
         GTK_SPINNER(
             workspace->graph_spinner
@@ -1756,6 +1902,49 @@ void workspace_set_graph_node_moved_callback(
         user_data;
 }
 
+void workspace_set_reset_graph_layout_callback(
+    Workspace *workspace,
+    WorkspaceResetGraphLayoutCallback callback,
+    gpointer user_data
+)
+{
+    if (workspace == NULL)
+    {
+        return;
+    }
+
+    workspace->reset_graph_layout_callback =
+        callback;
+
+    workspace->reset_graph_layout_user_data =
+        user_data;
+}
+
+void workspace_reset_graph_layout(
+    Workspace *workspace
+)
+{
+    if (workspace == NULL ||
+        workspace->graph_view == NULL ||
+        workspace->graph_state != WORKSPACE_GRAPH_STATE_READY ||
+        workspace->graph_model == NULL)
+    {
+        return;
+    }
+
+    entity_details_panel_clear(
+        workspace->entity_details_panel
+    );
+
+    investigation_graph_view_clear_selection(
+        workspace->graph_view
+    );
+
+    investigation_graph_view_reset_layout(
+        workspace->graph_view
+    );
+}
+
 void workspace_free(Workspace *workspace)
 {
     if (workspace == NULL)
@@ -1821,6 +2010,18 @@ void workspace_free(Workspace *workspace)
     workspace->graph_node_moved_user_data =
         NULL;
 
+    workspace->reset_graph_layout_callback =
+        NULL;
+
+    workspace->reset_graph_layout_user_data =
+        NULL;
+
+    workspace->graph_toolbar =
+        NULL;
+
+    workspace->reset_graph_layout_button =
+        NULL;
+
     g_clear_pointer(
         &workspace->selected_evidence_identifier,
         g_free