Adding upstream version 2.10.34.upstream/2.10.34upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 385 insertions, 0 deletions

diff --git a/libgimpwidgets/gimpspinbutton.c b/libgimpwidgets/gimpspinbutton.c
new file mode 100644
index 0000000..4d87e9d
--- /dev/null
+++ b/libgimpwidgets/gimpspinbutton.c
@@ -0,0 +1,385 @@
+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimpspinbutton.c
+ * Copyright (C) 2018 Ell
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+#include <gdk/gdkkeysyms.h>
+
+#include "libgimpmath/gimpmath.h"
+
+#include "gimpwidgetstypes.h"
+
+#include "gimp3migration.h"
+#include "gimpspinbutton.h"
+
+
+/**
+ * SECTION: gimpspinbutton
+ * @title: GimpSpinButton
+ * @short_description: A #GtkSpinButton with a some tweaked functionality.
+ *
+ * #GimpSpinButton is a drop-in replacement for #GtkSpinButton, with the
+ * following changes:
+ *
+ *   - When the spin-button loses focus, its adjustment value is only
+ *     updated if the entry text has been changed.
+ *
+ *   - When the spin-button's "wrap" property is TRUE, values input through the
+ *     entry are wrapped around.
+ *
+ *   - Modifiers can be used during scrolling for smaller/bigger increments.
+ **/
+
+
+#define MAX_DIGITS 20
+
+
+struct _GimpSpinButtonPrivate
+{
+  gboolean changed;
+};
+
+
+/*  local function prototypes  */
+
+static gboolean   gimp_spin_button_scroll    (GtkWidget      *widget,
+                                              GdkEventScroll *event);
+static gboolean   gimp_spin_button_key_press (GtkWidget      *widget,
+                                              GdkEventKey    *event);
+static gboolean   gimp_spin_button_focus_in  (GtkWidget      *widget,
+                                              GdkEventFocus  *event);
+static gboolean   gimp_spin_button_focus_out (GtkWidget      *widget,
+                                              GdkEventFocus  *event);
+
+static gint       gimp_spin_button_input     (GtkSpinButton  *spin_button,
+                                              gdouble        *new_value);
+
+static void       gimp_spin_button_changed   (GtkEditable    *editable,
+                                              gpointer        data);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpSpinButton, gimp_spin_button,
+                            GTK_TYPE_SPIN_BUTTON)
+
+#define parent_class gimp_spin_button_parent_class
+
+
+/*  private functions  */
+
+
+static void
+gimp_spin_button_class_init (GimpSpinButtonClass *klass)
+{
+  GtkWidgetClass     *widget_class      = GTK_WIDGET_CLASS (klass);
+  GtkSpinButtonClass *spin_button_class = GTK_SPIN_BUTTON_CLASS (klass);
+
+  widget_class->scroll_event    = gimp_spin_button_scroll;
+  widget_class->key_press_event = gimp_spin_button_key_press;
+  widget_class->focus_in_event  = gimp_spin_button_focus_in;
+  widget_class->focus_out_event = gimp_spin_button_focus_out;
+
+  spin_button_class->input      = gimp_spin_button_input;
+}
+
+static void
+gimp_spin_button_init (GimpSpinButton *spin_button)
+{
+  spin_button->priv = gimp_spin_button_get_instance_private (spin_button);
+
+  g_signal_connect (spin_button, "changed",
+                    G_CALLBACK (gimp_spin_button_changed),
+                    NULL);
+}
+
+static gboolean
+gimp_spin_button_scroll (GtkWidget      *widget,
+                         GdkEventScroll *event)
+{
+  if (event->direction == GDK_SCROLL_UP ||
+      event->direction == GDK_SCROLL_DOWN)
+    {
+      GtkSpinButton *spin_button = GTK_SPIN_BUTTON (widget);
+      GtkAdjustment *adjustment  = gtk_spin_button_get_adjustment (spin_button);
+      gdouble        step_inc;
+      gdouble        page_inc;
+      gint           digits;
+      gdouble        step;
+
+      step_inc = gtk_adjustment_get_step_increment (adjustment);
+      page_inc = gtk_adjustment_get_page_increment (adjustment);
+      digits   = gtk_spin_button_get_digits (spin_button);
+
+      if (event->state & GDK_SHIFT_MASK)
+        {
+          step = step_inc * step_inc / page_inc;
+          step = MAX (step, pow (10.0, -digits));
+        }
+      else if (event->state & GDK_CONTROL_MASK)
+        {
+          step = page_inc;
+        }
+      else
+        {
+          step = step_inc;
+        }
+
+      if (event->direction == GDK_SCROLL_DOWN)
+        step = -step;
+
+      if (! gtk_widget_has_focus (widget))
+        gtk_widget_grab_focus (widget);
+
+      gtk_spin_button_spin (spin_button, GTK_SPIN_USER_DEFINED, step);
+
+      return TRUE;
+    }
+
+  return GTK_WIDGET_CLASS (parent_class)->scroll_event (widget, event);
+}
+
+static gboolean
+gimp_spin_button_key_press (GtkWidget   *widget,
+                            GdkEventKey *event)
+{
+  switch (event->keyval)
+    {
+      case GDK_KEY_Return:
+      case GDK_KEY_KP_Enter:
+      case GDK_KEY_ISO_Enter:
+      case GDK_KEY_Escape:
+        {
+          GtkEntry      *entry       = GTK_ENTRY (widget);
+          GtkSpinButton *spin_button = GTK_SPIN_BUTTON (widget);
+          gchar         *text;
+          gboolean       changed;
+
+          text = g_strdup (gtk_entry_get_text (entry));
+
+          if (event->keyval == GDK_KEY_Escape)
+            {
+              gtk_spin_button_set_value (
+                spin_button,
+                gtk_spin_button_get_value (spin_button));
+            }
+          else
+            {
+              gtk_spin_button_update (spin_button);
+            }
+
+          changed = strcmp (gtk_entry_get_text (entry), text);
+
+          g_free (text);
+
+          if (changed)
+            {
+              gtk_editable_set_position (GTK_EDITABLE (widget), -1);
+
+              return TRUE;
+            }
+        }
+        break;
+    }
+
+  return GTK_WIDGET_CLASS (parent_class)->key_press_event (widget, event);
+}
+
+static gboolean
+gimp_spin_button_focus_in (GtkWidget     *widget,
+                           GdkEventFocus *event)
+{
+  GimpSpinButton *spin_button = GIMP_SPIN_BUTTON (widget);
+
+  spin_button->priv->changed = FALSE;
+
+  return GTK_WIDGET_CLASS (parent_class)->focus_in_event (widget, event);
+}
+
+static gboolean
+gimp_spin_button_focus_out (GtkWidget     *widget,
+                            GdkEventFocus *event)
+{
+  GimpSpinButton *spin_button = GIMP_SPIN_BUTTON (widget);
+  gboolean        editable;
+  gboolean        result;
+
+  editable = gtk_editable_get_editable (GTK_EDITABLE (widget));
+
+  if (! spin_button->priv->changed)
+    gtk_editable_set_editable (GTK_EDITABLE (widget), FALSE);
+
+  result = GTK_WIDGET_CLASS (parent_class)->focus_out_event (widget, event);
+
+  if (! spin_button->priv->changed)
+    gtk_editable_set_editable (GTK_EDITABLE (widget), editable);
+
+  return result;
+}
+
+static gint
+gimp_spin_button_input (GtkSpinButton *spin_button,
+                        gdouble       *new_value)
+{
+  if (gtk_spin_button_get_wrap (spin_button))
+    {
+      gdouble  value;
+      gdouble  min;
+      gdouble  max;
+      gchar   *endptr;
+
+      value = g_strtod (gtk_entry_get_text (GTK_ENTRY (spin_button)), &endptr);
+
+      if (*endptr)
+        return FALSE;
+
+      gtk_spin_button_get_range (spin_button, &min, &max);
+
+      if (min < max)
+        {
+          gdouble rem;
+
+          rem = fmod (value - min, max - min);
+
+          if (rem < 0.0)
+            rem += max - min;
+
+          if (rem == 0.0)
+            value = CLAMP (value, min, max);
+          else
+            value = min + rem;
+        }
+      else
+        {
+          value = min;
+        }
+
+      *new_value = value;
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+static void
+gimp_spin_button_changed (GtkEditable *editable,
+                          gpointer     data)
+{
+  GimpSpinButton *spin_button = GIMP_SPIN_BUTTON (editable);
+
+  spin_button->priv->changed = TRUE;
+}
+
+
+/*  public functions  */
+
+
+/**
+ * gimp_spin_button_new:
+ * @adjustment: (allow-none): the #GtkAdjustment object that this spin
+ *                            button should use, or %NULL
+ * @climb_rate:               specifies by how much the rate of change in the
+ *                            value will accelerate if you continue to hold
+ *                            down an up/down button or arrow key
+ * @digits:                   the number of decimal places to display
+ *
+ * Creates a new #GimpSpinButton.
+ *
+ * Returns: The new spin button as a #GtkWidget
+ *
+ * Since: 2.10.10
+ */
+GtkWidget *
+gimp_spin_button_new_ (GtkAdjustment *adjustment,
+                       gdouble        climb_rate,
+                       guint          digits)
+{
+  GtkWidget *spin_button;
+
+  g_return_val_if_fail (adjustment == NULL || GTK_IS_ADJUSTMENT (adjustment),
+                        NULL);
+
+  spin_button = g_object_new (GIMP_TYPE_SPIN_BUTTON, NULL);
+
+  gtk_spin_button_configure (GTK_SPIN_BUTTON (spin_button),
+                             adjustment, climb_rate, digits);
+
+  return spin_button;
+}
+
+/**
+ * gimp_spin_button_new_with_range:
+ * @min:  Minimum allowable value
+ * @max:  Maximum allowable value
+ * @step: Increment added or subtracted by spinning the widget
+ *
+ * This is a convenience constructor that allows creation of a numeric
+ * #GimpSpinButton without manually creating an adjustment.  The value is
+ * initially set to the minimum value and a page increment of 10 * @step
+ * is the default.  The precision of the spin button is equivalent to the
+ * precision of @step.
+ *
+ * Note that the way in which the precision is derived works best if @step
+ * is a power of ten. If the resulting precision is not suitable for your
+ * needs, use gtk_spin_button_set_digits() to correct it.
+ *
+ * Returns: The new spin button as a #GtkWidget
+ *
+ * Since: 2.10.10
+ */
+GtkWidget *
+gimp_spin_button_new_with_range (gdouble min,
+                                 gdouble max,
+                                 gdouble step)
+{
+  GtkAdjustment *adjustment;
+  GtkWidget     *spin_button;
+  gint           digits;
+
+  g_return_val_if_fail (min <= max, NULL);
+  g_return_val_if_fail (step != 0.0, NULL);
+
+  spin_button = g_object_new (GIMP_TYPE_SPIN_BUTTON, NULL);
+
+  adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (min, min, max,
+                                                   step, 10.0 * step, 0.0));
+
+  if (fabs (step) >= 1.0 || step == 0.0)
+    {
+      digits = 0;
+    }
+  else
+    {
+      digits = abs ((gint) floor (log10 (fabs (step))));
+
+      if (digits > MAX_DIGITS)
+        digits = MAX_DIGITS;
+    }
+
+  gtk_spin_button_configure   (GTK_SPIN_BUTTON (spin_button),
+                               adjustment, step, digits);
+  gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spin_button), TRUE);
+
+  return spin_button;
+}