Stub LdCategorySymbolView.

5 files changed, 332 insertions, 5 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e5f4847..bb3f149 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -125,6 +125,7 @@ set (liblogdiag_SOURCES
 	liblogdiag/ld-diagram-view.c
 	liblogdiag/ld-library.c
 	liblogdiag/ld-category-view.c
+	liblogdiag/ld-category-symbol-view.c
 	liblogdiag/ld-category.c
 	liblogdiag/ld-symbol.c
 	liblogdiag/ld-lua.c
@@ -142,6 +143,7 @@ set (liblogdiag_HEADERS
 	liblogdiag/ld-diagram-view.h
 	liblogdiag/ld-library.h
 	liblogdiag/ld-category-view.h
+	liblogdiag/ld-category-symbol-view.h
 	liblogdiag/ld-category.h
 	liblogdiag/ld-symbol.h
 	liblogdiag/ld-lua.h
diff --git a/liblogdiag/ld-category-symbol-view.c b/liblogdiag/ld-category-symbol-view.c
new file mode 100644
index 0000000..7489668
--- /dev/null
+++ b/liblogdiag/ld-category-symbol-view.c
@@ -0,0 +1,252 @@
+/*
+ * ld-category-symbol-view.c
+ *
+ * This file is a part of logdiag.
+ * Copyright Přemysl Janouch 2012. All rights reserved.
+ *
+ * See the file LICENSE for licensing information.
+ *
+ */
+
+#include "liblogdiag.h"
+#include "config.h"
+
+
+/**
+ * SECTION:ld-category-symbol-view
+ * @short_description: A widget that displays symbols in a category
+ * @see_also: #LdCategory, #LdDiagramView
+ *
+ * #LdCategorySymbolView allows the user to drag symbols from an #LdCategory
+ * onto #LdDiagramView.
+ */
+
+/*
+ * LdCategorySymbolViewPrivate:
+ * @category: a category object assigned as a model.
+ */
+struct _LdCategorySymbolViewPrivate
+{
+	LdCategory *category;
+	guint height_negotiation : 1;
+};
+
+enum
+{
+	PROP_0,
+	PROP_CATEGORY
+};
+
+static void ld_category_symbol_view_get_property (GObject *object,
+	guint property_id, GValue *value, GParamSpec *pspec);
+static void ld_category_symbol_view_set_property (GObject *object,
+	guint property_id, const GValue *value, GParamSpec *pspec);
+static void ld_category_symbol_view_finalize (GObject *gobject);
+
+static void on_size_request (GtkWidget *widget, GtkRequisition *requisition,
+	gpointer user_data);
+static void on_size_allocate (GtkWidget *widget, GdkRectangle *allocation,
+	gpointer user_data);
+static gboolean on_expose_event (GtkWidget *widget, GdkEventExpose *event,
+	gpointer user_data);
+
+
+G_DEFINE_TYPE (LdCategorySymbolView,
+	ld_category_symbol_view, GTK_TYPE_DRAWING_AREA);
+
+static void
+ld_category_symbol_view_class_init (LdCategorySymbolViewClass *klass)
+{
+	GObjectClass *object_class;
+	GParamSpec *pspec;
+
+	object_class = G_OBJECT_CLASS (klass);
+	object_class->get_property = ld_category_symbol_view_get_property;
+	object_class->set_property = ld_category_symbol_view_set_property;
+	object_class->finalize = ld_category_symbol_view_finalize;
+
+/**
+ * LdCategorySymbolView:category:
+ *
+ * The underlying #LdCategory object of this view.
+ */
+	pspec = g_param_spec_object ("category", "Category",
+		"The underlying category object of this view.",
+		LD_TYPE_CATEGORY, G_PARAM_READWRITE);
+	g_object_class_install_property (object_class, PROP_CATEGORY, pspec);
+
+	g_type_class_add_private (klass, sizeof (LdCategorySymbolViewPrivate));
+}
+
+static void
+ld_category_symbol_view_init (LdCategorySymbolView *self)
+{
+	self->priv = G_TYPE_INSTANCE_GET_PRIVATE
+		(self, LD_TYPE_CATEGORY_SYMBOL_VIEW, LdCategorySymbolViewPrivate);
+
+	g_signal_connect (self, "size-allocate",
+		G_CALLBACK (on_size_allocate), NULL);
+	g_signal_connect (self, "size-request",
+		G_CALLBACK (on_size_request), NULL);
+	g_signal_connect (self, "expose-event",
+		G_CALLBACK (on_expose_event), NULL);
+
+	gtk_widget_add_events (GTK_WIDGET (self),
+		GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK
+		| GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK
+		| GDK_LEAVE_NOTIFY_MASK);
+}
+
+static void
+ld_category_symbol_view_finalize (GObject *gobject)
+{
+	LdCategorySymbolView *self;
+
+	self = LD_CATEGORY_SYMBOL_VIEW (gobject);
+
+	if (self->priv->category)
+		g_object_unref (self->priv->category);
+
+	/* Chain up to the parent class. */
+	G_OBJECT_CLASS (ld_category_symbol_view_parent_class)->finalize (gobject);
+}
+
+static void
+ld_category_symbol_view_get_property (GObject *object, guint property_id,
+	GValue *value, GParamSpec *pspec)
+{
+	LdCategorySymbolView *self;
+
+	self = LD_CATEGORY_SYMBOL_VIEW (object);
+	switch (property_id)
+	{
+	case PROP_CATEGORY:
+		g_value_set_object (value, ld_category_symbol_view_get_category (self));
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+	}
+}
+
+static void
+ld_category_symbol_view_set_property (GObject *object, guint property_id,
+	const GValue *value, GParamSpec *pspec)
+{
+	LdCategorySymbolView *self;
+
+	self = LD_CATEGORY_SYMBOL_VIEW (object);
+	switch (property_id)
+	{
+	case PROP_CATEGORY:
+		ld_category_symbol_view_set_category (self,
+			LD_CATEGORY (g_value_get_object (value)));
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+	}
+}
+
+static void
+on_size_request (GtkWidget *widget, GtkRequisition *requisition,
+	gpointer user_data)
+{
+	LdCategorySymbolView *self;
+
+	self = LD_CATEGORY_SYMBOL_VIEW (widget);
+
+	requisition->width = 10;
+
+	if (self->priv->height_negotiation)
+	{
+		GtkAllocation alloc;
+
+		gtk_widget_get_allocation (widget, &alloc);
+		requisition->height = 5000 / alloc.width;
+	}
+	else
+		requisition->height = 10;
+}
+
+static void
+on_size_allocate (GtkWidget *widget, GdkRectangle *allocation,
+	gpointer user_data)
+{
+	LdCategorySymbolView *self;
+
+	self = LD_CATEGORY_SYMBOL_VIEW (widget);
+
+	if (self->priv->height_negotiation)
+		self->priv->height_negotiation = FALSE;
+	else
+	{
+		self->priv->height_negotiation = TRUE;
+		gtk_widget_queue_resize (widget);
+	}
+}
+
+static gboolean
+on_expose_event (GtkWidget *widget, GdkEventExpose *event, gpointer user_data)
+{
+	cairo_t *cr;
+
+	cr = gdk_cairo_create (gtk_widget_get_window (widget));
+	gdk_cairo_rectangle (cr, &event->area);
+	cairo_clip (cr);
+
+	gdk_cairo_set_source_color (cr,
+		&gtk_widget_get_style (widget)->base[GTK_STATE_NORMAL]);
+	cairo_paint (cr);
+
+	cairo_destroy (cr);
+	return FALSE;
+}
+
+/* ===== Generic interface etc. ============================================ */
+
+/**
+ * ld_category_symbol_view_new:
+ *
+ * Create an instance.
+ */
+GtkWidget *
+ld_category_symbol_view_new (void)
+{
+	return g_object_new (LD_TYPE_CATEGORY_SYMBOL_VIEW, NULL);
+}
+
+/**
+ * ld_category_symbol_view_set_category:
+ * @self: an #LdCategorySymbolView object.
+ * @category: the #LdCategory to be assigned to the view.
+ *
+ * Assign an #LdCategory object to the view.
+ */
+void
+ld_category_symbol_view_set_category (LdCategorySymbolView *self,
+	LdCategory *category)
+{
+	g_return_if_fail (LD_IS_CATEGORY_SYMBOL_VIEW (self));
+	g_return_if_fail (LD_IS_CATEGORY (category));
+
+	if (self->priv->category)
+		g_object_unref (self->priv->category);
+
+	self->priv->category = category;
+	g_object_ref (category);
+
+	g_object_notify (G_OBJECT (self), "category");
+}
+
+/**
+ * ld_category_symbol_view_get_category:
+ * @self: an #LdCategorySymbolView object.
+ *
+ * Get the #LdCategory object assigned to this view.
+ * The reference count on the category is not incremented.
+ */
+LdCategory *
+ld_category_symbol_view_get_category (LdCategorySymbolView *self)
+{
+	g_return_val_if_fail (LD_IS_CATEGORY_SYMBOL_VIEW (self), NULL);
+	return self->priv->category;
+}
diff --git a/liblogdiag/ld-category-symbol-view.h b/liblogdiag/ld-category-symbol-view.h
new file mode 100644
index 0000000..10da898
--- /dev/null
+++ b/liblogdiag/ld-category-symbol-view.h
@@ -0,0 +1,63 @@
+/*
+ * ld-category-symbol-view.h
+ *
+ * This file is a part of logdiag.
+ * Copyright Přemysl Janouch 2012. All rights reserved.
+ *
+ * See the file LICENSE for licensing information.
+ *
+ */
+
+#ifndef __LD_CATEGORY_SYMBOL_VIEW_H__
+#define __LD_CATEGORY_SYMBOL_VIEW_H__
+
+G_BEGIN_DECLS
+
+
+#define LD_TYPE_CATEGORY_SYMBOL_VIEW (ld_category_symbol_view_get_type ())
+#define LD_CATEGORY_SYMBOL_VIEW(obj) (G_TYPE_CHECK_INSTANCE_CAST \
+	((obj), LD_TYPE_CATEGORY_SYMBOL_VIEW, LdCategorySymbolView))
+#define LD_CATEGORY_SYMBOL_VIEW_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST \
+	((klass), LD_TYPE_CATEGORY_SYMBOL_VIEW, LdCategorySymbolViewClass))
+#define LD_IS_CATEGORY_SYMBOL_VIEW(obj) (G_TYPE_CHECK_INSTANCE_TYPE \
+	((obj), LD_TYPE_CATEGORY_SYMBOL_VIEW))
+#define LD_IS_CATEGORY_SYMBOL_VIEW_CLASS(klass) (G_TYPE_CHECK_INSTANCE_TYPE \
+	((klass), LD_TYPE_CATEGORY_SYMBOL_VIEW))
+#define LD_CATEGORY_SYMBOL_VIEW_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS \
+	((obj), LD_CATEGORY_SYMBOL_VIEW, LdCategorySymbolViewClass))
+
+typedef struct _LdCategorySymbolView LdCategorySymbolView;
+typedef struct _LdCategorySymbolViewPrivate LdCategorySymbolViewPrivate;
+typedef struct _LdCategorySymbolViewClass LdCategorySymbolViewClass;
+
+
+/**
+ * LdCategorySymbolView:
+ */
+struct _LdCategorySymbolView
+{
+/*< private >*/
+	GtkDrawingArea parent_instance;
+	LdCategorySymbolViewPrivate *priv;
+};
+
+struct _LdCategorySymbolViewClass
+{
+/*< private >*/
+	GtkDrawingAreaClass parent_class;
+};
+
+
+GType ld_category_symbol_view_get_type (void) G_GNUC_CONST;
+
+GtkWidget *ld_category_symbol_view_new (void);
+
+void ld_category_symbol_view_set_category
+	(LdCategorySymbolView *self, LdCategory *category);
+LdCategory *ld_category_symbol_view_get_category
+	(LdCategorySymbolView *self);
+
+
+G_END_DECLS
+
+#endif /* ! __LD_CATEGORY_SYMBOL_VIEW_H__ */
diff --git a/liblogdiag/ld-category-view.c b/liblogdiag/ld-category-view.c
index 75d10f1..5c0d7d4 100644
--- a/liblogdiag/ld-category-view.c
+++ b/liblogdiag/ld-category-view.c
@@ -263,18 +263,27 @@ reload_category (LdCategoryView *self)
 
 	if (self->priv->category)
 	{
-		GSList *children;
-
-		/* TODO: Also show the symbols. */
+		GSList *symbols, *children;
 
+		symbols  = (GSList *) ld_category_get_symbols  (self->priv->category);
 		children = (GSList *) ld_category_get_children (self->priv->category);
+
+		if (symbols)
+		{
+			GtkWidget *symbol_view;
+
+			symbol_view = ld_category_symbol_view_new ();
+			ld_category_symbol_view_set_category
+				(LD_CATEGORY_SYMBOL_VIEW (symbol_view), self->priv->category);
+			gtk_box_pack_start (GTK_BOX (self), symbol_view, FALSE, FALSE, 0);
+		}
+
 		if (children)
 		{
 			reconstruct_prefix (self);
 			g_slist_foreach (children, load_category_cb, self);
 		}
-		else
-			/* TODO: Don't show this if there are any symbols. */
+		else if (!symbols)
 			gtk_box_pack_start (GTK_BOX (self),
 				create_empty_label (), FALSE, FALSE, 0);
 	}
diff --git a/liblogdiag/liblogdiag.h b/liblogdiag/liblogdiag.h
index 97ee308..e3b0d90 100644
--- a/liblogdiag/liblogdiag.h
+++ b/liblogdiag/liblogdiag.h
@@ -28,6 +28,7 @@
 #include "ld-diagram.h"
 
 #include "ld-diagram-view.h"
+#include "ld-category-symbol-view.h"
 #include "ld-category-view.h"
 
 #include "ld-lua.h"