[gtk+] gtk-demo: Add a scale example

[Matthias Clasen <matthiasc src gnome org>]

commit b0481811574fd95b96724e4be8fcc0e8d43727e9
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Jul 31 16:36:02 2015 -0400

    gtk-demo: Add a scale example

 demos/gtk-demo/Makefile.am        |    1 +
 demos/gtk-demo/demo.gresource.xml |    4 +
 demos/gtk-demo/scale.c            |   38 ++++++++++
 demos/gtk-demo/scale.ui           |  143 +++++++++++++++++++++++++++++++++++++
 4 files changed, 186 insertions(+), 0 deletions(-)
---
diff --git a/demos/gtk-demo/Makefile.am b/demos/gtk-demo/Makefile.am
index f89dd33..d85e7ca 100644
--- a/demos/gtk-demo/Makefile.am
+++ b/demos/gtk-demo/Makefile.am
@@ -52,6 +52,7 @@ demos_base =                                  \
        printing.c                              \
        revealer.c                              \
        rotated_text.c                          \
+       scale.c                                 \
        search_entry.c                          \
        search_entry2.c                         \
        sidebar.c                               \
diff --git a/demos/gtk-demo/demo.gresource.xml b/demos/gtk-demo/demo.gresource.xml
index 6bdcdf7..70eb3b9 100644
--- a/demos/gtk-demo/demo.gresource.xml
+++ b/demos/gtk-demo/demo.gresource.xml
@@ -159,6 +159,7 @@
     <file>printing.c</file>
     <file>revealer.c</file>
     <file>rotated_text.c</file>
+    <file>scale.c</file>
     <file>search_entry.c</file>
     <file>search_entry2.c</file>
     <file>sizegroup.c</file>
@@ -205,4 +206,7 @@
   <gresource prefix="/markup">
     <file>markup.txt</file>
   </gresource>
+  <gresource prefix="/scale">
+    <file>scale.ui</file>
+  </gresource>
 </gresources>
diff --git a/demos/gtk-demo/scale.c b/demos/gtk-demo/scale.c
new file mode 100644
index 0000000..6f4d8d4
--- /dev/null
+++ b/demos/gtk-demo/scale.c
@@ -0,0 +1,38 @@
+/* Scale
+ *
+ * GtkScale is a way to select a value from a range.
+ * Scales can have marks to help pick special values,
+ * and they can also restrict the values that can be
+ * chosen.
+ */
+
+#include <gtk/gtk.h>
+
+GtkWidget *
+do_scale (GtkWidget *do_widget)
+{
+  static GtkWidget *window = NULL;
+
+  if (!window)
+    {
+      GtkBuilder *builder;
+
+      builder = gtk_builder_new_from_resource ("/scale/scale.ui");
+      gtk_builder_connect_signals (builder, NULL);
+      window = GTK_WIDGET (gtk_builder_get_object (builder, "window1"));
+      gtk_window_set_screen (GTK_WINDOW (window),
+                             gtk_widget_get_screen (do_widget));
+      g_signal_connect (window, "destroy",
+                        G_CALLBACK (gtk_widget_destroyed), &window);
+
+      g_object_unref (builder);
+    }
+
+  if (!gtk_widget_get_visible (window))
+    gtk_widget_show_all (window);
+  else
+    gtk_widget_destroy (window);
+
+
+  return window;
+}
diff --git a/demos/gtk-demo/scale.ui b/demos/gtk-demo/scale.ui
new file mode 100644
index 0000000..b09ce43
--- /dev/null
+++ b/demos/gtk-demo/scale.ui
@@ -0,0 +1,143 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <!-- interface-requires gtk+ 3.6 -->
+  <object class="GtkAdjustment" id="adjustment1">
+    <property name="lower">0</property>
+    <property name="upper">4</property>
+    <property name="value">2</property>
+  </object>
+  <object class="GtkAdjustment" id="adjustment2">
+    <property name="lower">0</property>
+    <property name="upper">4</property>
+    <property name="value">2</property>
+  </object>
+  <object class="GtkAdjustment" id="adjustment3">
+    <property name="lower">0</property>
+    <property name="upper">4</property>
+    <property name="value">2</property>
+  </object>
+  <object class="GtkWindow" id="window1">
+    <property name="can_focus">False</property>
+    <property name="title" translatable="yes">Scales</property>
+    <property name="border-width" translatable="yes">20</property>
+    <child>
+      <object class="GtkGrid" id="grid1">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <property name="row-spacing">10</property>
+        <property name="column-spacing">10</property>
+        <child>
+          <object class="GtkLabel">
+            <property name="visible">True</property>
+            <property name="label">Plain</property>
+            <property name="xalign">0</property>
+            <property name="halign">fill</property>
+          </object>
+          <packing>
+            <property name="left_attach">0</property>
+            <property name="top_attach">0</property>
+            <property name="width">1</property>
+            <property name="height">1</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkScale">
+            <property name="visible">True</property>
+            <property name="orientation">horizontal</property>
+            <property name="can_focus">True</property>
+            <property name="width-request">200</property>
+            <property name="draw_value">False</property>
+            <property name="adjustment">adjustment1</property>
+            <property name="hexpand">True</property>
+            <property name="halign">fill</property>
+          </object>
+          <packing>
+            <property name="left_attach">1</property>
+            <property name="top_attach">0</property>
+            <property name="width">1</property>
+            <property name="height">1</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkLabel">
+            <property name="visible">True</property>
+            <property name="label">Marks</property>
+            <property name="xalign">0</property>
+            <property name="halign">fill</property>
+          </object>
+          <packing>
+            <property name="left_attach">0</property>
+            <property name="top_attach">1</property>
+            <property name="width">1</property>
+            <property name="height">1</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkScale">
+            <property name="visible">True</property>
+            <property name="orientation">horizontal</property>
+            <property name="can_focus">True</property>
+            <property name="width-request">200</property>
+            <property name="draw_value">False</property>
+            <property name="adjustment">adjustment2</property>
+            <property name="hexpand">True</property>
+            <property name="halign">fill</property>
+            <marks>
+              <mark value="0" position="bottom"></mark>
+              <mark value="1" position="bottom"></mark>
+              <mark value="2" position="bottom"></mark>
+              <mark value="3" position="bottom"></mark>
+              <mark value="4" position="bottom"></mark>
+            </marks>
+          </object>
+          <packing>
+            <property name="left_attach">1</property>
+            <property name="top_attach">1</property>
+            <property name="width">1</property>
+            <property name="height">1</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkLabel">
+            <property name="visible">True</property>
+            <property name="label">Discrete</property>
+            <property name="xalign">0</property>
+            <property name="halign">fill</property>
+          </object>
+          <packing>
+            <property name="left_attach">0</property>
+            <property name="top_attach">2</property>
+            <property name="width">1</property>
+            <property name="height">1</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkScale">
+            <property name="visible">True</property>
+            <property name="orientation">horizontal</property>
+            <property name="can_focus">True</property>
+            <property name="width-request">200</property>
+            <property name="round-digits">0</property>
+            <property name="draw_value">False</property>
+            <property name="adjustment">adjustment3</property>
+            <property name="hexpand">True</property>
+            <property name="halign">fill</property>
+            <marks>
+              <mark value="0" position="bottom"></mark>
+              <mark value="1" position="bottom"></mark>
+              <mark value="2" position="bottom"></mark>
+              <mark value="3" position="bottom"></mark>
+              <mark value="4" position="bottom"></mark>
+            </marks>
+          </object>
+          <packing>
+            <property name="left_attach">1</property>
+            <property name="top_attach">2</property>
+            <property name="width">1</property>
+            <property name="height">1</property>
+          </packing>
+        </child>
+      </object>
+    </child>
+  </object>
+</interface>