1 files changed, 163 insertions, 0 deletions
diff --git a/src/widgets/spinbutton-events.cpp b/src/widgets/spinbutton-events.cpp
new file mode 100644
index 0000000..9800cf5
--- /dev/null
+++ b/src/widgets/spinbutton-events.cpp
@@ -0,0 +1,163 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Common callbacks for spinbuttons
+ *
+ * Authors:
+ *   bulia byak <bulia@users.sourceforge.net>
+ *   Jon A. Cruz <jon@joncruz.org>
+ *
+ * Copyright (C) 2013 authors
+ * Copyright (C) 2003 authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <gtk/gtk.h>
+#include <gdk/gdkkeysyms.h>
+
+#include "ui/tools/tool-base.h"
+
+#include "spinbutton-events.h"
+
+gboolean spinbutton_focus_in(GtkWidget *w, GdkEventKey * /*event*/, gpointer /*data*/)
+{
+    gdouble *ini = static_cast<gdouble *>(g_object_get_data(G_OBJECT(w), "ini"));
+    if (ini) {
+        g_free(ini); // free the old value if any
+    }
+
+    // retrieve the value
+    ini = g_new(gdouble, 1);
+    *ini = gtk_spin_button_get_value(GTK_SPIN_BUTTON(w));
+
+    // remember it
+    g_object_set_data(G_OBJECT(w), "ini", ini);
+
+    return FALSE; // I didn't consume the event
+}
+
+void spinbutton_undo(GtkWidget *w)
+{
+    gdouble *ini = static_cast<gdouble *>(g_object_get_data(G_OBJECT(w), "ini"));
+    if (ini) {
+        gtk_spin_button_set_value(GTK_SPIN_BUTTON(w), *ini);
+    }
+}
+
+void spinbutton_defocus(GtkWidget *container)
+{
+    // defocus spinbuttons by moving focus to the canvas, unless "stay" is on
+    gboolean stay = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(container), "stay"));
+    if (stay) {
+        g_object_set_data(G_OBJECT(container), "stay", GINT_TO_POINTER(FALSE));
+    } else {
+        GtkWidget *canvas = GTK_WIDGET(g_object_get_data(G_OBJECT(container), "dtw"));
+        if (canvas) {
+            gtk_widget_grab_focus(GTK_WIDGET(canvas));
+        }
+    }
+}
+
+gboolean spinbutton_keypress(GtkWidget *w, GdkEventKey *event, gpointer /*data*/)
+{
+    gboolean result = FALSE; // I didn't consume the event
+
+    switch (Inkscape::UI::Tools::get_latin_keyval(event)) {
+	case GDK_KEY_Escape: // defocus
+            spinbutton_undo(w);
+            spinbutton_defocus(w);
+            result = TRUE; // I consumed the event
+            break;
+	case GDK_KEY_Return: // defocus
+	case GDK_KEY_KP_Enter:
+            spinbutton_defocus(w);
+            result = TRUE; // I consumed the event
+            break;
+	case GDK_KEY_Tab:
+	case GDK_KEY_ISO_Left_Tab:
+            // set the flag meaning "do not leave toolbar when changing value"
+            g_object_set_data(G_OBJECT(w), "stay", GINT_TO_POINTER(TRUE));
+            result = FALSE; // I didn't consume the event
+            break;
+
+            // The following keys are processed manually because GTK implements them in strange ways
+            // (increments start with double step value and seem to grow as you press the key continuously)
+
+	case GDK_KEY_Up:
+	case GDK_KEY_KP_Up:
+        {
+            g_object_set_data(G_OBJECT(w), "stay", GINT_TO_POINTER(TRUE));
+            gdouble v = gtk_spin_button_get_value(GTK_SPIN_BUTTON(w));
+            gdouble step = 0;
+            gdouble page = 0;
+            gtk_spin_button_get_increments(GTK_SPIN_BUTTON(w), &step, &page);
+            v += step;
+            gtk_spin_button_set_value(GTK_SPIN_BUTTON(w), v);
+            result = TRUE; // I consumed the event
+            break;
+        }
+	case GDK_KEY_Down:
+	case GDK_KEY_KP_Down:
+        {
+            g_object_set_data(G_OBJECT(w), "stay", GINT_TO_POINTER(TRUE));
+            gdouble v = gtk_spin_button_get_value(GTK_SPIN_BUTTON(w));
+            gdouble step = 0;
+            gdouble page = 0;
+            gtk_spin_button_get_increments(GTK_SPIN_BUTTON(w), &step, &page);
+            v -= step;
+            gtk_spin_button_set_value(GTK_SPIN_BUTTON(w), v);
+            result = TRUE; // I consumed the event
+            break;
+        }
+	case GDK_KEY_Page_Up:
+	case GDK_KEY_KP_Page_Up:
+        {
+            g_object_set_data(G_OBJECT(w), "stay", GINT_TO_POINTER(TRUE));
+            gdouble v = gtk_spin_button_get_value(GTK_SPIN_BUTTON(w));
+            gdouble step = 0;
+            gdouble page = 0;
+            gtk_spin_button_get_increments(GTK_SPIN_BUTTON(w), &step, &page);
+            v += page;
+            gtk_spin_button_set_value(GTK_SPIN_BUTTON(w), v);
+            result = TRUE; // I consumed the event
+            break;
+        }
+	case GDK_KEY_Page_Down:
+	case GDK_KEY_KP_Page_Down:
+        {
+            g_object_set_data(G_OBJECT(w), "stay", GINT_TO_POINTER(TRUE));
+            gdouble v = gtk_spin_button_get_value(GTK_SPIN_BUTTON(w));
+            gdouble step = 0;
+            gdouble page = 0;
+            gtk_spin_button_get_increments(GTK_SPIN_BUTTON(w), &step, &page);
+            v -= page;
+            gtk_spin_button_set_value(GTK_SPIN_BUTTON(w), v);
+            result = TRUE; // I consumed the event
+            break;
+        }
+	case GDK_KEY_z:
+	case GDK_KEY_Z:
+            g_object_set_data(G_OBJECT(w), "stay", GINT_TO_POINTER(TRUE));
+            if (event->state & GDK_CONTROL_MASK) {
+                spinbutton_undo(w);
+                result = TRUE; // I consumed the event
+            }
+            break;
+	default:
+            result = FALSE;
+            break;
+    }
+
+    return result;
+}
+
+/*
+  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:fileencoding=utf-8:textwidth=99 :