From acae310d49358ac8de885fa8692caf5e4067574c Mon Sep 17 00:00:00 2001
From: "Johan B. C. Engelen" <jbc.engelen@swissonline.ch>
Date: Sun, 2 Mar 2008 13:38:15 +0000
Subject: NEW: temporary on-canvas indicators

(bzr r4918)
---
 src/display/canvas-temporary-item.cpp | 72 +++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 src/display/canvas-temporary-item.cpp

(limited to 'src/display/canvas-temporary-item.cpp')

diff --git a/src/display/canvas-temporary-item.cpp b/src/display/canvas-temporary-item.cpp
new file mode 100644
index 000000000..da6caf2c1
--- /dev/null
+++ b/src/display/canvas-temporary-item.cpp
@@ -0,0 +1,72 @@
+/** \file
+ * Provides a class that can contain active TemporaryItem's on a desktop
+ * When the object is deleted, it also deletes the canvasitem it contains!
+ * This object should be created/managed by a TemporaryItemList.
+ * After its lifetime, it fires the timeout signal, afterwards *it deletes itself*.
+ *
+ * (part of code inspired by message-stack.cpp)
+ *
+ * Authors:
+ *   Johan Engelen
+ *
+ * Copyright (C) Johan Engelen 2008 <j.b.c.engelen@utwente.nl>
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include "display/canvas-temporary-item.h"
+
+#include <gtk/gtkobject.h>
+
+namespace Inkscape {
+namespace Display {
+
+/** lifetime is measured in milliseconds
+ */
+TemporaryItem::TemporaryItem(SPCanvasItem *item, guint lifetime)
+    : canvasitem(item),
+      timeout_id(0)
+{
+    if (lifetime > 0) {
+        timeout_id = g_timeout_add(lifetime, &TemporaryItem::_timeout, this);
+    }
+}
+
+TemporaryItem::~TemporaryItem()
+{
+    // when it has not expired yet...
+    if (timeout_id) {
+        g_source_remove(timeout_id);
+        timeout_id = 0;
+    }
+
+    if (canvasitem) {
+        // destroying the item automatically hides it
+        gtk_object_destroy (GTK_OBJECT (canvasitem));
+        canvasitem = NULL;
+    }
+}
+
+/* static method*/
+gboolean TemporaryItem::_timeout(gpointer data) {
+    TemporaryItem *tempitem = reinterpret_cast<TemporaryItem *>(data);
+    tempitem->timeout_id = 0;
+    tempitem->signal_timeout.emit(tempitem);
+    delete tempitem;
+    return FALSE;
+}
+
+
+} //namespace Display
+} /* namespace Inkscape */
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
-- 
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