[gtk/matthiasc/for-main: 4/5] gtk4-demo: Polish the font features demo

From: Matthias Clasen <matthiasc src gnome org>
To: commits-list gnome org
Cc:
Subject: [gtk/matthiasc/for-main: 4/5] gtk4-demo: Polish the font features demo
Date: Thu, 30 Jun 2022 22:53:42 +0000 (UTC)

commit 16325415b4787fa924b2c533e92a3ca1e0726e9b
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Jun 30 17:51:41 2022 -0400

    gtk4-demo: Polish the font features demo

 demos/gtk-demo/font_features.c  |  40 ++++++++++-
 demos/gtk-demo/font_features.ui | 142 +++++++++++++++++++++-------------------
 2 files changed, 114 insertions(+), 68 deletions(-)
---
diff --git a/demos/gtk-demo/font_features.c b/demos/gtk-demo/font_features.c
index a17625bce3..c4912f38c3 100644
--- a/demos/gtk-demo/font_features.c
+++ b/demos/gtk-demo/font_features.c
@@ -43,6 +43,7 @@ typedef struct {
 typedef struct {
   guint32 tag;
   GtkAdjustment *adjustment;
+  double default_value;
 } Axis;
 
 typedef struct {
@@ -135,6 +136,25 @@ basic_entry_activated (GtkEntry *entry,
     gtk_adjustment_set_value (adjustment, value);
 }
 
+static void
+font_features_reset_basic (void)
+{
+  gtk_adjustment_set_value (demo->size_adjustment, 20);
+  gtk_adjustment_set_value (demo->letterspacing_adjustment, 0);
+  gtk_adjustment_set_value (demo->line_height_adjustment, 1);
+}
+
+static void
+update_basic (void)
+{
+  PangoFontDescription *desc;
+
+  desc = gtk_font_chooser_get_font_desc (GTK_FONT_CHOOSER (demo->font));
+
+  gtk_adjustment_set_value (demo->size_adjustment,
+                            pango_font_description_get_size (desc) / (double) PANGO_SCALE);
+}
+
 static void add_font_variations (GString *s);
 
 static void
@@ -888,6 +908,19 @@ entry_activated (GtkEntry *entry,
 
 static void unset_instance (GtkAdjustment *adjustment);
 
+static void
+font_features_reset_variations (void)
+{
+  GHashTableIter iter;
+  Axis *axis;
+
+  g_hash_table_iter_init (&iter, demo->axes);
+  while (g_hash_table_iter_next (&iter, (gpointer *)NULL, (gpointer *)&axis))
+    {
+      gtk_adjustment_set_value (axis->adjustment, axis->default_value);
+    }
+}
+
 static void
 add_font_variations (GString *s)
 {
@@ -966,6 +999,7 @@ add_axis (hb_face_t             *hb_face,
   axis = g_new (Axis, 1);
   axis->tag = ax->tag;
   axis->adjustment = adjustment;
+  axis->default_value = ax->default_value;
   g_hash_table_add (demo->axes, axis);
 
   adjustment_changed (adjustment, GTK_ENTRY (axis_entry));
@@ -1249,6 +1283,7 @@ done:
 G_MODULE_EXPORT void
 font_features_font_changed (void)
 {
+  update_basic ();
   update_script_combo ();
   update_features ();
   update_font_variations ();
@@ -1261,7 +1296,7 @@ font_features_script_changed (void)
   update_display ();
 }
 
-G_MODULE_EXPORT void
+static void
 font_features_reset_features (void)
 {
   GList *l;
@@ -1358,6 +1393,9 @@ do_font_features (GtkWidget *do_widget)
       scope = gtk_builder_cscope_new ();
       gtk_builder_cscope_add_callback (scope, basic_value_changed);
       gtk_builder_cscope_add_callback (scope, basic_entry_activated);
+      gtk_builder_cscope_add_callback (scope, font_features_reset_basic);
+      gtk_builder_cscope_add_callback (scope, font_features_reset_features);
+      gtk_builder_cscope_add_callback (scope, font_features_reset_variations);
       gtk_builder_set_scope (builder, scope);
 
       demo = g_new0 (FontFeaturesDemo, 1);
diff --git a/demos/gtk-demo/font_features.ui b/demos/gtk-demo/font_features.ui
index 844638641c..4a707b532f 100644
--- a/demos/gtk-demo/font_features.ui
+++ b/demos/gtk-demo/font_features.ui
@@ -2,26 +2,26 @@
 <interface>
   <object class="GtkAdjustment" id="size_adjustment">
     <property name="lower">7</property>
+    <property name="upper">100</property>
     <property name="value">14</property>
     <property name="step_increment">0.5</property>
     <property name="page_increment">10</property>
-    <property name="upper">100</property>
     <signal name="value-changed" handler="basic_value_changed" object="size_entry" swapped="false"/>
   </object>
   <object class="GtkAdjustment" id="letterspacing_adjustment">
-    <property name="lower">0</property>
+    <property name="lower">-1024</property>
+    <property name="upper">8192</property>
     <property name="value">0</property>
     <property name="step_increment">1</property>
     <property name="page_increment">512</property>
-    <property name="upper">10240</property>
     <signal name="value-changed" handler="basic_value_changed" object="letterspacing_entry" swapped="false"/>
   </object>
   <object class="GtkAdjustment" id="line_height_adjustment">
-    <property name="lower">1</property>
-    <property name="value">1</property>
+    <property name="lower">0.75</property>
+    <property name="upper">2.5</property>
+    <property name="value">1.0</property>
     <property name="step_increment">0.1</property>
     <property name="page_increment">1</property>
-    <property name="upper">3</property>
     <signal name="value-changed" handler="basic_value_changed" object="line_height_entry" swapped="false"/>
   </object>
   <object class="GtkWindow" id="window">
@@ -35,7 +35,9 @@
             <property name="receives-default">1</property>
             <property name="tooltip-text">Reset</property>
             <property name="icon-name">view-refresh-symbolic</property>
+            <signal name="clicked" handler="font_features_reset_basic" swapped="no"/>
             <signal name="clicked" handler="font_features_reset_features" swapped="no"/>
+            <signal name="clicked" handler="font_features_reset_variations" swapped="no"/>
           </object>
         </child>
       </object>
@@ -59,7 +61,7 @@
                       <object class="GtkFontButton" id="font">
                         <property name="receives-default">1</property>
                         <property name="font">Sans 12</property>
-                        <property name="level">family|style|size|variations|features</property>
+                        <property name="level">family|style</property>
                         <signal name="font-set" handler="font_features_font_changed" swapped="no"/>
                       </object>
                     </child>
@@ -240,87 +242,93 @@
           </object>
         </child>
         <child>
-          <object class="GtkBox">
-            <property name="orientation">vertical</property>
-            <property name="hexpand">1</property>
-            <property name="vexpand">1</property>
-            <property name="margin-start">20</property>
-            <property name="margin-end">20</property>
-            <property name="margin-top">20</property>
-            <property name="margin-bottom">20</property>
-            <property name="spacing">20</property>
+          <object class="GtkScrolledWindow">
+            <property name="hscrollbar-policy">never</property>
+            <property name="vscrollbar-policy">automatic</property>
             <child>
-              <object class="GtkStack" id="stack">
+              <object class="GtkBox">
+                <property name="orientation">vertical</property>
+                <property name="hexpand">1</property>
+                <property name="vexpand">1</property>
+                <property name="margin-start">20</property>
+                <property name="margin-end">20</property>
+                <property name="margin-top">20</property>
+                <property name="margin-bottom">20</property>
+                <property name="spacing">20</property>
                 <child>
-                  <object class="GtkStackPage">
-                    <property name="name">label</property>
-                    <property name="child">
-                      <object class="GtkLabel" id="label">
-                        <property name="wrap">1</property>
-                        <property name="xalign">0</property>
-                        <property name="yalign">0</property>
-                        <property name="valign">start</property>
-                        <property name="selectable">1</property>
+                  <object class="GtkStack" id="stack">
+                    <child>
+                      <object class="GtkStackPage">
+                        <property name="name">label</property>
+                        <property name="child">
+                          <object class="GtkLabel" id="label">
+                            <property name="wrap">1</property>
+                            <property name="xalign">0</property>
+                            <property name="yalign">0</property>
+                            <property name="valign">start</property>
+                            <property name="selectable">1</property>
+                          </object>
+                        </property>
                       </object>
-                    </property>
-                  </object>
-                </child>
-                <child>
-                  <object class="GtkStackPage">
-                    <property name="name">entry</property>
-                    <property name="child">
-                      <object class="GtkEntry" id="entry">
-                        <property name="text">Grumpy wizards make toxic brew for the evil Queen and Jack. A 
quick movement of the enemy will jeopardize six gunboats. The job of waxing linoleum frequently peeves 
chintzy kids. My girl wove six dozen plaid jackets before she quit. Twelve ziggurats quickly jumped a finch 
box.
+                    </child>
+                    <child>
+                      <object class="GtkStackPage">
+                        <property name="name">entry</property>
+                        <property name="child">
+                          <object class="GtkEntry" id="entry">
+                            <property name="text">Grumpy wizards make toxic brew for the evil Queen and 
Jack. A quick movement of the enemy will jeopardize six gunboats. The job of waxing linoleum frequently 
peeves chintzy kids. My girl wove six dozen plaid jackets before she quit. Twelve ziggurats quickly jumped a 
finch box.
 
-Разъяренный чтец эгоистично бьёт пятью жердями шустрого фехтовальщика. Наш банк вчера же выплатил Ф.Я. 
Эйхгольду комиссию за ценные вещи. Эх, чужак, общий съём цен шляп (юфть) – вдрызг! В чащах юга жил бы цитрус? 
Да, но фальшивый экземпляр!
+    Разъяренный чтец эгоистично бьёт пятью жердями шустрого фехтовальщика. Наш банк вчера же выплатил Ф.Я. 
Эйхгольду комиссию за ценные вещи. Эх, чужак, общий съём цен шляп (юфть) – вдрызг! В чащах юга жил бы цитрус? 
Да, но фальшивый экземпляр!
 
-Τάχιστη αλώπηξ βαφής ψημένη γη, δρασκελίζει υπέρ νωθρού κυνός</property>
-                        <signal name="activate" handler="font_features_stop_edit"/>
-                        <property name="valign">start</property>
-                        <property name="width-chars">50</property>
+    Τάχιστη αλώπηξ βαφής ψημένη γη, δρασκελίζει υπέρ νωθρού κυνός</property>
+                            <signal name="activate" handler="font_features_stop_edit"/>
+                            <property name="valign">start</property>
+                            <property name="width-chars">50</property>
+                          </object>
+                        </property>
                       </object>
-                    </property>
+                    </child>
                   </object>
                 </child>
-              </object>
-            </child>
-            <child>
-              <object class="GtkLabel" id="settings">
-                <property name="wrap">1</property>
-                <property name="xalign">0</property>
-                <property name="valign">end</property>
-                <property name="width-chars">50</property>
-                <property name="max-width-chars">50</property>
-                <property name="hexpand">1</property>
-                <property name="vexpand">1</property>
-                <style>
-                  <class name="monospace"/>
-                </style>
-              </object>
-            </child>
-            <child>
-              <object class="GtkBox">
-                <property name="spacing">10</property>
                 <child>
-                  <object class="GtkLabel" id="description">
+                  <object class="GtkLabel" id="settings">
                     <property name="wrap">1</property>
-                    <property name="wrap-mode">char</property>
                     <property name="xalign">0</property>
                     <property name="valign">end</property>
                     <property name="width-chars">50</property>
                     <property name="max-width-chars">50</property>
                     <property name="hexpand">1</property>
+                    <property name="vexpand">1</property>
                     <style>
                       <class name="monospace"/>
                     </style>
                   </object>
                 </child>
                 <child>
-                  <object class="GtkToggleButton" id="edit_toggle">
-                    <property name="icon-name">document-edit-symbolic</property>
-                    <property name="halign">end</property>
-                    <property name="valign">end</property>
-                    <signal name="toggled" handler="font_features_toggle_edit"/>
+                  <object class="GtkBox">
+                    <property name="spacing">10</property>
+                    <child>
+                      <object class="GtkLabel" id="description">
+                        <property name="wrap">1</property>
+                        <property name="wrap-mode">char</property>
+                        <property name="xalign">0</property>
+                        <property name="valign">end</property>
+                        <property name="width-chars">50</property>
+                        <property name="max-width-chars">50</property>
+                        <property name="hexpand">1</property>
+                        <style>
+                          <class name="monospace"/>
+                        </style>
+                      </object>
+                    </child>
+                    <child>
+                      <object class="GtkToggleButton" id="edit_toggle">
+                        <property name="icon-name">document-edit-symbolic</property>
+                        <property name="halign">end</property>
+                        <property name="valign">end</property>
+                        <signal name="toggled" handler="font_features_toggle_edit"/>
+                      </object>
+                    </child>
                   </object>
                 </child>
               </object>
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