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-rw-r--r--liblogdiag/ld-category-symbol-view.c151
-rw-r--r--liblogdiag/ld-diagram-view.c138
2 files changed, 276 insertions, 13 deletions
diff --git a/liblogdiag/ld-category-symbol-view.c b/liblogdiag/ld-category-symbol-view.c
index e9e9e6c..365be62 100644
--- a/liblogdiag/ld-category-symbol-view.c
+++ b/liblogdiag/ld-category-symbol-view.c
@@ -30,11 +30,23 @@
#define SYMBOL_HEIGHT 40 /* Height of a symbol. */
#define SYMBOL_SPACING 10 /* Spacing between symbols, and also borders. */
+typedef struct
+{
+ LdSymbol *symbol; /* The associated symbol, ref'ed. */
+ gchar *path; /* Path to the symbol. */
+
+ GdkRectangle rect; /* Clipping rectangle. */
+ gdouble scale; /* Scale to draw the symbol in. */
+ gdouble dx, dy; /* Delta into .rect. */
+}
+SymbolData;
+
/*
* LdCategorySymbolViewPrivate:
* @category: a category object assigned as a model.
* @path: path to the category within the library.
* @layout: (element-type SymbolData *): current layout of symbols.
+ * @preselected: currently preselected symbol.
* @height_negotiation: whether we are negotiating height right now.
*/
struct _LdCategorySymbolViewPrivate
@@ -42,20 +54,10 @@ struct _LdCategorySymbolViewPrivate
LdCategory *category;
gchar *path;
GSList *layout;
+ SymbolData *preselected;
guint height_negotiation : 1;
};
-typedef struct
-{
- LdSymbol *symbol; /* The associated symbol, ref'ed. */
- gchar *path; /* Path to the symbol. */
-
- GdkRectangle rect; /* Clipping rectangle. */
- gdouble scale; /* Scale to draw the symbol in. */
- gdouble dx, dy; /* Delta into .rect. */
-}
-SymbolData;
-
enum
{
PROP_0,
@@ -104,6 +106,112 @@ ld_category_symbol_view_class_init (LdCategorySymbolViewClass *klass)
}
static void
+symbol_redraw (LdCategorySymbolView *self, SymbolData *symbol)
+{
+ gtk_widget_queue_draw_area (GTK_WIDGET (self),
+ symbol->rect.x,
+ symbol->rect.y,
+ symbol->rect.width,
+ symbol->rect.height);
+}
+
+static void
+symbol_deselect (LdCategorySymbolView *self)
+{
+ if (!self->priv->preselected)
+ return;
+
+ symbol_redraw (self, self->priv->preselected);
+ self->priv->preselected = NULL;
+ gtk_drag_source_unset (GTK_WIDGET (self));
+}
+
+static gboolean
+on_leave_notify (GtkWidget *widget, GdkEventCrossing *event, gpointer user_data)
+{
+ symbol_deselect (LD_CATEGORY_SYMBOL_VIEW (widget));
+ return FALSE;
+}
+
+static gboolean
+on_motion_notify (GtkWidget *widget, GdkEventMotion *event, gpointer user_data)
+{
+ LdCategorySymbolView *self;
+ GSList *iter;
+
+ if (event->state & GDK_BUTTON1_MASK)
+ return FALSE;
+
+ self = LD_CATEGORY_SYMBOL_VIEW (widget);
+ for (iter = self->priv->layout; iter; iter = iter->next)
+ {
+ SymbolData *data;
+
+ data = iter->data;
+ if (event->x < data->rect.x
+ || event->y < data->rect.y
+ || event->x >= data->rect.x + data->rect.width
+ || event->y >= data->rect.y + data->rect.height)
+ continue;
+
+ if (data != self->priv->preselected)
+ {
+ GtkTargetEntry target = {"ld-symbol", GTK_TARGET_SAME_APP, 0};
+
+ symbol_deselect (self);
+ self->priv->preselected = data;
+ symbol_redraw (self, data);
+
+ gtk_drag_source_set (widget,
+ GDK_BUTTON1_MASK, &target, 1, GDK_ACTION_COPY);
+ }
+ return FALSE;
+ }
+
+ symbol_deselect (self);
+ return FALSE;
+}
+
+static void
+on_drag_data_get
+(GtkWidget *widget, GdkDragContext *ctx, GtkSelectionData *selection_data,
+ guint target_type, guint time, gpointer user_data)
+{
+ LdCategorySymbolView *self;
+
+ self = LD_CATEGORY_SYMBOL_VIEW (widget);
+ g_return_if_fail (self->priv->preselected != NULL);
+
+ gtk_selection_data_set (selection_data,
+ gtk_selection_data_get_target (selection_data),
+ 8, (guchar *) self->priv->preselected->path,
+ strlen (self->priv->preselected->path));
+}
+
+static void
+on_drag_begin (GtkWidget *widget, GdkDragContext *ctx, gpointer user_data)
+{
+ LdCategorySymbolView *self;
+ GdkPixbuf *pbuf;
+
+ self = LD_CATEGORY_SYMBOL_VIEW (widget);
+ g_return_if_fail (self->priv->preselected != NULL);
+
+ /* Some of the larger previews didn't work, and we have to get rid of
+ * the icon later when we're hovering above LdDiagramView anyway. */
+ pbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, 1, 1);
+ gdk_pixbuf_fill (pbuf, 0x00000000);
+ gtk_drag_set_icon_pixbuf (ctx, pbuf, 0, 0);
+ g_object_unref (pbuf);
+}
+
+static void
+on_drag_end (GtkWidget *widget, GdkDragContext *ctx, gpointer user_data)
+{
+ symbol_deselect (LD_CATEGORY_SYMBOL_VIEW (widget));
+}
+
+static void
ld_category_symbol_view_init (LdCategorySymbolView *self)
{
self->priv = G_TYPE_INSTANCE_GET_PRIVATE
@@ -116,6 +224,18 @@ ld_category_symbol_view_init (LdCategorySymbolView *self)
g_signal_connect (self, "expose-event",
G_CALLBACK (on_expose_event), NULL);
+ g_signal_connect (self, "motion-notify-event",
+ G_CALLBACK (on_motion_notify), NULL);
+ g_signal_connect (self, "leave-notify-event",
+ G_CALLBACK (on_leave_notify), NULL);
+
+ g_signal_connect (self, "drag-begin",
+ G_CALLBACK (on_drag_begin), NULL);
+ g_signal_connect (self, "drag-data-get",
+ G_CALLBACK (on_drag_data_get), NULL);
+ g_signal_connect (self, "drag-end",
+ G_CALLBACK (on_drag_end), 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
@@ -136,6 +256,7 @@ layout_destroy (LdCategorySymbolView *self)
g_slist_foreach (self->priv->layout, (GFunc) symbol_data_free, NULL);
g_slist_free (self->priv->layout);
self->priv->layout = NULL;
+ self->priv->preselected = NULL;
}
static void
@@ -331,11 +452,15 @@ on_expose_event (GtkWidget *widget, GdkEventExpose *event, gpointer user_data)
gdk_cairo_rectangle (cr, &data->rect);
cairo_clip (cr);
+ gdk_cairo_set_source_color (cr,
+ &gtk_widget_get_style (widget)->text[GTK_STATE_NORMAL]);
+
+ if (data == self->priv->preselected)
+ cairo_paint_with_alpha (cr, 0.1);
+
cairo_translate (cr, data->rect.x + data->dx, data->rect.y + data->dy);
cairo_scale (cr, data->scale, data->scale);
- gdk_cairo_set_source_color (cr,
- &gtk_widget_get_style (widget)->text[GTK_STATE_NORMAL]);
cairo_set_line_width (cr, 1 / data->scale);
ld_symbol_draw (data->symbol, cr);
diff --git a/liblogdiag/ld-diagram-view.c b/liblogdiag/ld-diagram-view.c
index 1d2764c..55a60c0 100644
--- a/liblogdiag/ld-diagram-view.c
+++ b/liblogdiag/ld-diagram-view.c
@@ -129,6 +129,9 @@ Color;
* @y: the Y coordinate of the center of view.
* @zoom: the current zoom.
* @show_grid: whether to show the grid.
+ * @dnd_symbol: currently dragged symbol.
+ * @dnd_last_position: last cursor movement position.
+ * @dnd_left: whether the user has stopped dragging.
* @terminal: position of the highlighted terminal.
* @terminal_hovered: whether a terminal is hovered.
* @drag_start_pos: position of the mouse pointer when dragging started.
@@ -152,6 +155,10 @@ struct _LdDiagramViewPrivate
gboolean show_grid;
+ LdDiagramObject *dnd_symbol;
+ LdPoint dnd_last_position;
+ guint dnd_left : 1;
+
LdPoint terminal;
gboolean terminal_hovered;
@@ -343,6 +350,16 @@ static gboolean on_button_release (GtkWidget *widget, GdkEventButton *event,
static gboolean on_scroll (GtkWidget *widget, GdkEventScroll *event,
gpointer user_data);
+static gboolean on_drag_motion (GtkWidget *widget, GdkDragContext *drag_ctx,
+ gint x, gint y, guint time, gpointer user_data);
+static gboolean on_drag_drop (GtkWidget *widget, GdkDragContext *drag_ctx,
+ gint x, gint y, guint time, gpointer user_data);
+static void on_drag_data_received (GtkWidget *widget, GdkDragContext *drag_ctx,
+ gint x, gint y, GtkSelectionData *data, guint info,
+ guint time, gpointer user_data);
+static void on_drag_leave (GtkWidget *widget, GdkDragContext *drag_ctx,
+ guint time, gpointer user_data);
+
static gboolean on_expose_event (GtkWidget *widget, GdkEventExpose *event,
gpointer user_data);
static void draw_grid (GtkWidget *widget, DrawData *data);
@@ -486,6 +503,8 @@ ld_diagram_view_class_init (LdDiagramViewClass *klass)
static void
ld_diagram_view_init (LdDiagramView *self)
{
+ GtkTargetEntry target = {"ld-symbol", GTK_TARGET_SAME_APP, 0};
+
self->priv = G_TYPE_INSTANCE_GET_PRIVATE
(self, LD_TYPE_DIAGRAM_VIEW, LdDiagramViewPrivate);
@@ -517,12 +536,23 @@ ld_diagram_view_init (LdDiagramView *self)
g_signal_connect (self, "scroll-event",
G_CALLBACK (on_scroll), NULL);
+ g_signal_connect (self, "drag-motion",
+ G_CALLBACK (on_drag_motion), NULL);
+ g_signal_connect (self, "drag-leave",
+ G_CALLBACK (on_drag_leave), NULL);
+ g_signal_connect (self, "drag-drop",
+ G_CALLBACK (on_drag_drop), NULL);
+ g_signal_connect (self, "drag-data-received",
+ G_CALLBACK (on_drag_data_received), NULL);
+
g_object_set (self, "can-focus", TRUE, 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);
+
+ gtk_drag_dest_set (GTK_WIDGET (self), 0, &target, 1, GDK_ACTION_COPY);
}
static void
@@ -541,6 +571,8 @@ ld_diagram_view_finalize (GObject *gobject)
}
if (self->priv->library)
g_object_unref (self->priv->library);
+ if (self->priv->dnd_symbol)
+ g_object_unref (self->priv->dnd_symbol);
/* Chain up to the parent class. */
G_OBJECT_CLASS (ld_diagram_view_parent_class)->finalize (gobject);
@@ -2425,6 +2457,109 @@ on_scroll (GtkWidget *widget, GdkEventScroll *event, gpointer user_data)
}
static gboolean
+on_drag_motion (GtkWidget *widget, GdkDragContext *drag_ctx,
+ gint x, gint y, guint time, gpointer user_data)
+{
+ LdDiagramView *self;
+ GdkAtom target;
+
+ self = LD_DIAGRAM_VIEW (widget);
+ target = gtk_drag_dest_find_target (widget, drag_ctx, NULL);
+ if (target == GDK_NONE)
+ {
+ gdk_drag_status (drag_ctx, 0, time);
+ return TRUE;
+ }
+
+ gdk_drag_status (drag_ctx,
+ gdk_drag_context_get_suggested_action (drag_ctx), time);
+
+ /* Discard leftovers from any previous unsuccessful drag. */
+ if (self->priv->dnd_left)
+ {
+ g_object_unref (self->priv->dnd_symbol);
+ self->priv->dnd_symbol = NULL;
+ self->priv->dnd_left = FALSE;
+ }
+
+ self->priv->dnd_last_position.x = x;
+ self->priv->dnd_last_position.y = y;
+
+ if (!self->priv->dnd_symbol)
+ gtk_drag_get_data (widget, drag_ctx, target, time);
+ else
+ {
+ queue_object_draw (self, self->priv->dnd_symbol);
+ move_object_to_point (self, self->priv->dnd_symbol,
+ &self->priv->dnd_last_position);
+ queue_object_draw (self, self->priv->dnd_symbol);
+ }
+
+ return TRUE;
+}
+
+static void
+on_drag_data_received (GtkWidget *widget, GdkDragContext *drag_ctx,
+ gint x, gint y, GtkSelectionData *data, guint info, guint time,
+ gpointer user_data)
+{
+ LdDiagramView *self;
+ LdDiagramSymbol *symbol;
+ const gchar *klass;
+
+ self = LD_DIAGRAM_VIEW (widget);
+
+ g_return_if_fail (gtk_selection_data_get_length (data) >= 0);
+ g_return_if_fail (self->priv->dnd_symbol == NULL);
+
+ klass = (const gchar *) gtk_selection_data_get_data (data);
+ symbol = ld_diagram_symbol_new (NULL);
+ ld_diagram_symbol_set_class (symbol, klass);
+ self->priv->dnd_symbol = LD_DIAGRAM_OBJECT (symbol);
+
+ move_object_to_point (self, self->priv->dnd_symbol,
+ &self->priv->dnd_last_position);
+ queue_object_draw (self, self->priv->dnd_symbol);
+}
+
+static void
+on_drag_leave (GtkWidget *widget, GdkDragContext *drag_ctx,
+ guint time, gpointer user_data)
+{
+ LdDiagramView *self;
+
+ self = LD_DIAGRAM_VIEW (widget);
+ self->priv->dnd_left = TRUE;
+ queue_object_draw (self, self->priv->dnd_symbol);
+}
+
+static gboolean
+on_drag_drop (GtkWidget *widget, GdkDragContext *drag_ctx,
+ gint x, gint y, guint time, gpointer user_data)
+{
+ LdDiagramView *self;
+ gboolean del;
+
+ del = gdk_drag_context_get_suggested_action (drag_ctx)
+ == GDK_ACTION_MOVE;
+
+ self = LD_DIAGRAM_VIEW (widget);
+ if (!self->priv->dnd_symbol)
+ gtk_drag_finish (drag_ctx, FALSE, del, time);
+ else
+ {
+ gtk_drag_finish (drag_ctx, TRUE, del, time);
+
+ ld_diagram_insert_object (self->priv->diagram,
+ self->priv->dnd_symbol, -1);
+ g_object_unref (self->priv->dnd_symbol);
+ self->priv->dnd_symbol = NULL;
+ self->priv->dnd_left = FALSE;
+ }
+ return TRUE;
+}
+
+static gboolean
on_expose_event (GtkWidget *widget, GdkEventExpose *event, gpointer user_data)
{
DrawData data;
@@ -2572,6 +2707,9 @@ draw_diagram (GtkWidget *widget, DrawData *data)
break;
}
+ if (data->self->priv->dnd_symbol && !data->self->priv->dnd_left)
+ draw_object (data->self->priv->dnd_symbol, data);
+
cairo_restore (data->cr);
}