1 files changed, 127 insertions, 0 deletions
diff --git a/src/ui/widget/zoom-status.cpp b/src/ui/widget/zoom-status.cpp
new file mode 100644
index 000000000..e7320102c
--- /dev/null
+++ b/src/ui/widget/zoom-status.cpp
@@ -0,0 +1,127 @@
+/** \file
+ * Gtkmm facade/wrapper around zoom_status code that formerly lived
+ * in desktop-widget.cpp
+ *
+ * Authors:
+ *   Ralf Stephan <ralf@ark.in-berlin.de>
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   MenTaLguY <mental@rydia.net>
+ *   bulia byak <buliabyak@users.sf.net>
+ *
+ * Copyright (C) 2005 Ralf Stephan
+ * Copyright (C) 2004 MenTaLguY
+ * Copyright (C) 1999-2002 Lauris Kaplinski
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information
+ */
+
+#include "ui/widget/zoom-status.h"
+#include "desktop.h"
+#include "desktop-handles.h"
+#include "widgets/spw-utilities.h"
+
+namespace Inkscape {
+namespace UI {
+namespace Widget {
+
+ZoomStatus::ZoomStatus()
+    : _adj(0.0, -1.0, 1.0, 0.1, 0.1)
+{
+    _dt = 0;
+    _upd_f = false;
+
+    property_numeric() = false;
+    property_update_policy() = Gtk::UPDATE_ALWAYS;
+    sp_set_font_size_smaller(static_cast<GtkWidget*>((void*)gobj()));
+}
+
+ZoomStatus::~ZoomStatus()
+{
+    _dt = 0;
+}
+
+void
+ZoomStatus::init(SPDesktop *dt)
+{
+    _dt = dt;
+    property_digits() = 4;
+    _adj.set_value(0.0);
+    _adj.set_lower(log(SP_DESKTOP_ZOOM_MIN)/log(2.0));
+    _adj.set_upper(log(SP_DESKTOP_ZOOM_MAX)/log(2.0));
+    _adj.set_step_increment(0.1);
+    _adj.set_page_increment(0.1);
+    set_adjustment(_adj);
+}
+
+void
+ZoomStatus::update()
+{
+    if (!_dt) return;
+    _upd_f = true;
+    set_value(log(_dt->current_zoom())/log(2.0));
+    _upd_f = false;
+}
+
+inline double
+value_to_display(double value)
+{
+    return floor(pow(2, value) * 100.0 + 0.5);
+}
+
+inline double
+display_to_value(double value)
+{
+    return  log(value / 100.0) / log(2.0);
+}
+
+int
+ZoomStatus::on_input(double *new_val)
+{
+    double new_scrolled = get_value();
+    double new_typed = atof(get_text().c_str());
+
+    if (value_to_display(new_scrolled) == new_typed)
+    { // the new value is set by scrolling
+        *new_val = new_scrolled;
+    } else { // the new value is typed in
+        *new_val = display_to_value(new_typed);
+    }
+
+    return true;
+}
+
+bool
+ZoomStatus::on_output()
+{
+    gchar b[64];
+    g_snprintf(b, 64, "%4.0f%%", value_to_display(get_value()));
+    set_text(b);
+    return true;
+}
+
+void
+ZoomStatus::on_value_changed()
+{
+    if (_upd_f) return;
+    _upd_f = true;
+    g_assert(_dt);
+    double zoom_factor = pow(2, get_value());
+    NR::Rect const d =_dt->get_display_area();
+    _dt->zoom_absolute(d.midpoint()[NR::X], d.midpoint()[NR::Y], zoom_factor);
+    gtk_widget_grab_focus(static_cast<GtkWidget*>((void*)_dt->canvas));   /// \todo this no love song
+    _upd_f = false;
+}
+
+}}}
+
+/*
+  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:encoding=utf-8:textwidth=99 :