[gtk+/wip/matthiasc/font-variations: 9/14] Add another fun demo
- From: Matthias Clasen <matthiasc src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtk+/wip/matthiasc/font-variations: 9/14] Add another fun demo
- Date: Thu, 21 Dec 2017 17:26:40 +0000 (UTC)
commit ba92738f0afccb5f4e55a060956e3707416e9168
Author: Matthias Clasen <mclasen redhat com>
Date: Mon Dec 18 22:51:52 2017 -0500
Add another fun demo
Explore the weight-width plane freely.
demos/gtk-demo/demo.gresource.xml | 2 +
demos/gtk-demo/font_explorer.c | 367 +++++++++++++++++++++++++++++++++++++
demos/gtk-demo/fontplane.c | 315 +++++++++++++++++++++++++++++++
demos/gtk-demo/fontplane.h | 65 +++++++
demos/gtk-demo/meson.build | 4 +-
5 files changed, 751 insertions(+), 2 deletions(-)
---
diff --git a/demos/gtk-demo/demo.gresource.xml b/demos/gtk-demo/demo.gresource.xml
index 4539b40..eab8524 100644
--- a/demos/gtk-demo/demo.gresource.xml
+++ b/demos/gtk-demo/demo.gresource.xml
@@ -162,7 +162,9 @@
<file>widgetbowl.c</file>
<file>flowbox.c</file>
<file>foreigndrawing.c</file>
+ <file>font_explorer.c</file>
<file>font_features.c</file>
+ <file>fontplane.c</file>
<file>gestures.c</file>
<file>glarea.c</file>
<file>headerbar.c</file>
diff --git a/demos/gtk-demo/font_explorer.c b/demos/gtk-demo/font_explorer.c
new file mode 100644
index 0000000..e76ca77
--- /dev/null
+++ b/demos/gtk-demo/font_explorer.c
@@ -0,0 +1,367 @@
+/* Pango/Font Explorer
+ *
+ * Explore the width and weight axes simultaneously.
+ */
+
+#include <glib/gi18n.h>
+#include <gtk/gtk.h>
+
+#include <pango/pangofc-font.h>
+#include <hb-ot.h>
+#include <freetype/ftmm.h>
+
+#include "fontplane.h"
+
+#define MAKE_TAG(a,b,c,d) (unsigned int)(((a) << 24) | ((b) << 16) | ((c) << 8) | (d))
+
+#define FixedToFloat(f) (((float)(f))/65536.0)
+
+static GtkWidget *window = NULL;
+static GtkWidget *scale = NULL;
+static GtkWidget *entry = NULL;
+static GtkWidget *axis_grid = NULL;
+static char *font = NULL;
+static char *variations = NULL;
+static double size = 0;
+
+static void
+update_entry (void)
+{
+ PangoFontDescription *desc;
+ PangoFontDescription *desc2;
+ PangoAttrList *attrs;
+
+ desc = pango_font_description_from_string (font);
+ if (pango_font_description_get_size_is_absolute (desc))
+ pango_font_description_set_absolute_size (desc, size * PANGO_SCALE);
+ else
+ pango_font_description_set_size (desc, size * PANGO_SCALE);
+ desc2 = pango_font_description_from_string (variations);
+ pango_font_description_merge (desc, desc2, TRUE);
+
+ attrs = pango_attr_list_new ();
+
+ pango_attr_list_insert (attrs, pango_attr_font_desc_new (desc));
+
+ gtk_entry_set_attributes (GTK_ENTRY (entry), attrs);
+
+ pango_attr_list_unref (attrs);
+ pango_font_description_free (desc);
+ pango_font_description_free (desc2);
+}
+
+static void
+update_scale (void)
+{
+ gtk_range_set_value (GTK_RANGE (scale), size);
+}
+
+static void
+size_changed (GtkAdjustment *adj, gpointer data)
+{
+ double value;
+
+ value = gtk_adjustment_get_value (adj);
+ if (fabs (value - size) > 0.001)
+ {
+ size = value;
+ update_entry ();
+ }
+}
+
+typedef struct {
+ guint32 tag;
+ GtkAdjustment *adjustment;
+} Axis;
+
+static GHashTable *axes;
+
+
+static void
+add_font_variations (GString *s)
+{
+ GHashTableIter iter;
+ Axis *axis;
+ char buf[G_ASCII_DTOSTR_BUF_SIZE];
+ char *sep = " @";
+
+ g_hash_table_iter_init (&iter, axes);
+ while (g_hash_table_iter_next (&iter, (gpointer *)NULL, (gpointer *)&axis))
+ {
+ char tag[5];
+ double value;
+
+ hb_tag_to_string (axis->tag, tag);
+ tag[4] = '\0';
+ value = gtk_adjustment_get_value (axis->adjustment);
+
+ g_string_append_printf (s, "%s%s=%s", sep, tag, g_ascii_dtostr (buf, sizeof (buf), value));
+ sep = ",";
+ }
+}
+
+static guint
+axes_hash (gconstpointer v)
+{
+ const Axis *p = v;
+
+ return p->tag;
+}
+
+static gboolean
+axes_equal (gconstpointer v1, gconstpointer v2)
+{
+ const Axis *p1 = v1;
+ const Axis *p2 = v2;
+
+ return p1->tag == p2->tag;
+}
+
+static void
+collect_variations (void)
+{
+ GString *s;
+
+ s = g_string_new ("");
+ add_font_variations (s);
+
+ g_free (variations);
+ variations = g_string_free (s, FALSE);
+}
+
+static void
+adjustment_changed (GtkAdjustment *adjustment,
+ GtkEntry *entry)
+{
+ char *str;
+
+ if (entry)
+ {
+ str = g_strdup_printf ("%g", gtk_adjustment_get_value (adjustment));
+ gtk_entry_set_text (GTK_ENTRY (entry), str);
+ g_free (str);
+ }
+
+ collect_variations ();
+ update_entry ();
+}
+
+static void
+entry_activated (GtkEntry *entry,
+ GtkAdjustment *adjustment)
+{
+ gdouble value;
+ gchar *err = NULL;
+
+ value = g_strtod (gtk_entry_get_text (entry), &err);
+ if (err != NULL)
+ gtk_adjustment_set_value (adjustment, value);
+}
+
+static void
+add_axis (FT_Var_Axis *ax, FT_Fixed value, int i)
+{
+ GtkWidget *axis_label;
+ GtkWidget *axis_entry;
+ GtkWidget *axis_scale;
+ GtkAdjustment *adjustment;
+ Axis *axis;
+
+ axis_label = gtk_label_new (ax->name);
+ gtk_widget_set_halign (axis_label, GTK_ALIGN_START);
+ gtk_widget_set_valign (axis_label, GTK_ALIGN_BASELINE);
+ gtk_grid_attach (GTK_GRID (axis_grid), axis_label, 0, i, 1, 1);
+ adjustment = gtk_adjustment_new ((double)FixedToFloat(value),
+ (double)FixedToFloat(ax->minimum),
+ (double)FixedToFloat(ax->maximum),
+ 1.0, 10.0, 0.0);
+ axis_scale = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, adjustment);
+ gtk_scale_add_mark (GTK_SCALE (axis_scale), (double)FixedToFloat(ax->def), GTK_POS_TOP, NULL);
+ gtk_widget_set_valign (axis_scale, GTK_ALIGN_BASELINE);
+ gtk_widget_set_hexpand (axis_scale, TRUE);
+ gtk_widget_set_size_request (axis_scale, 100, -1);
+ gtk_scale_set_draw_value (GTK_SCALE (axis_scale), FALSE);
+ gtk_grid_attach (GTK_GRID (axis_grid), axis_scale, 1, i, 1, 1);
+ axis_entry = gtk_entry_new ();
+ gtk_widget_set_valign (axis_entry, GTK_ALIGN_BASELINE);
+ gtk_entry_set_width_chars (GTK_ENTRY (axis_entry), 4);
+ gtk_grid_attach (GTK_GRID (axis_grid), axis_entry, 2, i, 1, 1);
+
+ axis = g_new (Axis, 1);
+ axis->tag = ax->tag;
+ axis->adjustment = adjustment;
+ g_hash_table_add (axes, axis);
+
+ adjustment_changed (adjustment, GTK_ENTRY (axis_entry));
+
+ g_signal_connect (adjustment, "value-changed", G_CALLBACK (adjustment_changed), axis_entry);
+ g_signal_connect (axis_entry, "activate", G_CALLBACK (entry_activated), adjustment);
+}
+
+static void
+remove_all_axes (void)
+{
+ GList *children, *l;
+
+ children = gtk_container_get_children (GTK_CONTAINER (axis_grid));
+ for (l = children; l; l = l->next)
+ gtk_widget_destroy (GTK_WIDGET (l->data));
+ g_list_free (children);
+
+ g_hash_table_remove_all (axes);
+}
+
+static void
+add_font_plane (int i)
+{
+ GtkWidget *plane;
+ Axis *weight_axis;
+ Axis *width_axis;
+
+ Axis key;
+
+ key.tag = MAKE_TAG('w','g','h','t');
+ weight_axis = g_hash_table_lookup (axes, &key);
+ key.tag = MAKE_TAG('w','d','t','h');
+ width_axis = g_hash_table_lookup (axes, &key);
+
+ g_assert (weight_axis && width_axis);
+
+ plane = gtk_font_plane_new (weight_axis->adjustment,
+ width_axis->adjustment);
+
+ gtk_widget_set_size_request (plane, 300, 300);
+ gtk_widget_set_halign (plane, GTK_ALIGN_CENTER);
+ gtk_grid_attach (GTK_GRID (axis_grid), plane, 0, i, 3, 1);
+}
+
+static void
+update_axes (void)
+{
+ PangoFontDescription *desc;
+ PangoContext *context;
+ PangoFont *pango_font;
+ FT_Face ft_face;
+ FT_MM_Var *ft_mm_var;
+ FT_Error res;
+
+ remove_all_axes ();
+
+ desc = pango_font_description_from_string (font);
+ context = gtk_widget_get_pango_context (window);
+ pango_font = pango_context_load_font (context, desc);
+ ft_face = pango_fc_font_lock_face (PANGO_FC_FONT (pango_font));
+
+ res = FT_Get_MM_Var (ft_face, &ft_mm_var);
+ if (res == 0)
+ {
+ unsigned int i;
+ FT_Fixed *coords;
+
+ coords = g_new (FT_Fixed, ft_mm_var->num_axis);
+ res = FT_Get_Var_Design_Coordinates (ft_face, ft_mm_var->num_axis, coords);
+
+ if (res == 0)
+ {
+ int weight = -1;
+ int width = -1;
+
+ for (i = 0; i < ft_mm_var->num_axis; i++)
+ {
+ if (ft_mm_var->axis[i].tag == MAKE_TAG('w', 'g', 'h', 't'))
+ weight = i;
+ if (ft_mm_var->axis[i].tag == MAKE_TAG('w', 'd', 't', 'h'))
+ width = i;
+ add_axis (&ft_mm_var->axis[i], coords[i], i);
+ }
+
+ if (weight >= 0 && width >= 0)
+ add_font_plane (i);
+ }
+
+ g_free (coords);
+ free (ft_mm_var);
+ }
+
+ pango_fc_font_unlock_face (PANGO_FC_FONT (pango_font));
+ g_object_unref (pango_font);
+ pango_font_description_free (desc);
+}
+
+static void
+font_set (GtkFontButton *button, gpointer data)
+{
+ g_free (font);
+ font = gtk_font_chooser_get_font (GTK_FONT_CHOOSER (button));
+ size = ((double)gtk_font_chooser_get_font_size (GTK_FONT_CHOOSER (button)))/PANGO_SCALE;
+
+ update_scale ();
+ update_entry ();
+ update_axes ();
+}
+
+GtkWidget *
+do_font_explorer (GtkWidget *do_widget)
+{
+ GtkWidget *box;
+ GtkWidget *chooser;
+ char *fontname;
+
+ if (!window)
+ {
+ if (axes == NULL)
+ axes = g_hash_table_new_full (axes_hash, axes_equal, NULL, g_free);
+ else
+ g_hash_table_remove_all (axes);
+
+ font = g_strdup ("Voto Serif GX");
+ variations = g_strdup ("");
+ size = 11;
+
+ window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+ gtk_window_set_title (GTK_WINDOW (window), "Font Explorer");
+ box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 10);
+ g_object_set (box, "margin", 10, NULL);
+ gtk_container_add (GTK_CONTAINER (window), box);
+
+ chooser = gtk_font_button_new ();
+ gtk_widget_set_halign (chooser, GTK_ALIGN_START);
+ g_signal_connect (chooser, "font-set",
+ G_CALLBACK (font_set), NULL);
+ gtk_container_add (GTK_CONTAINER (box), chooser);
+
+ fontname = g_strdup_printf ("%s %g", font, size);
+ gtk_font_chooser_set_font (GTK_FONT_CHOOSER (chooser), fontname);
+ g_free (fontname);
+
+ axis_grid = gtk_grid_new ();
+ gtk_grid_set_row_spacing (GTK_GRID (axis_grid), 10);
+ gtk_grid_set_column_spacing (GTK_GRID (axis_grid), 10);
+ gtk_container_add (GTK_CONTAINER (box), axis_grid);
+
+ scale = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL, 1, 100, 1);
+ g_signal_connect (gtk_range_get_adjustment (GTK_RANGE (scale)),
+ "value-changed",
+ G_CALLBACK (size_changed), NULL);
+
+ gtk_widget_set_halign (scale, GTK_ALIGN_FILL);
+ gtk_container_add (GTK_CONTAINER (box), scale);
+
+ entry = gtk_entry_new ();
+ gtk_widget_set_halign (entry, GTK_ALIGN_FILL);
+ gtk_container_add (GTK_CONTAINER (box), entry);
+
+ gtk_entry_set_text (GTK_ENTRY (entry), "The fonts are upon us!");
+
+ update_scale ();
+ update_entry ();
+ update_axes ();
+ }
+
+ if (!gtk_widget_get_visible (window))
+ gtk_widget_show (window);
+ else
+ gtk_widget_destroy (window);
+
+ return window;
+}
diff --git a/demos/gtk-demo/fontplane.c b/demos/gtk-demo/fontplane.c
new file mode 100644
index 0000000..9f04bd3
--- /dev/null
+++ b/demos/gtk-demo/fontplane.c
@@ -0,0 +1,315 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * 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 2 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include "fontplane.h"
+
+#include "gtk.h"
+
+enum {
+ PROP_0,
+ PROP_WEIGHT_ADJUSTMENT,
+ PROP_WIDTH_ADJUSTMENT
+};
+
+G_DEFINE_TYPE (GtkFontPlane, gtk_font_plane, GTK_TYPE_WIDGET)
+
+static double
+adjustment_get_normalized_value (GtkAdjustment *adj)
+{
+ return (gtk_adjustment_get_value (adj) - gtk_adjustment_get_lower (adj)) /
+ (gtk_adjustment_get_upper (adj) - gtk_adjustment_get_lower (adj));
+}
+
+static void
+val_to_xy (GtkFontPlane *plane,
+ gint *x,
+ gint *y)
+{
+ gdouble u, v;
+ gint width, height;
+
+ width = gtk_widget_get_allocated_width (GTK_WIDGET (plane));
+ height = gtk_widget_get_allocated_height (GTK_WIDGET (plane));
+
+ u = adjustment_get_normalized_value (plane->width_adj);
+ v = adjustment_get_normalized_value (plane->weight_adj);
+
+ *x = CLAMP (width * u, 0, width - 1);
+ *y = CLAMP (height * (1 - v), 0, height - 1);
+}
+
+static void
+plane_snapshot (GtkWidget *widget,
+ GtkSnapshot *snapshot)
+{
+ GtkFontPlane *plane = GTK_FONT_PLANE (widget);
+ gint x, y;
+ gint width, height;
+ cairo_t *cr;
+
+ val_to_xy (plane, &x, &y);
+ width = gtk_widget_get_allocated_width (widget);
+ height = gtk_widget_get_allocated_height (widget);
+
+ cr = gtk_snapshot_append_cairo (snapshot,
+ &GRAPHENE_RECT_INIT (0, 0, width, height),
+ "FontPlane");
+
+ cairo_set_source_rgb (cr, 0, 0, 0);
+ cairo_rectangle (cr, 0, 0, width, height);
+ cairo_paint (cr);
+
+ cairo_move_to (cr, 0, y + 0.5);
+ cairo_line_to (cr, width, y + 0.5);
+
+ cairo_move_to (cr, x + 0.5, 0);
+ cairo_line_to (cr, x + 0.5, height);
+
+ if (gtk_widget_has_visible_focus (widget))
+ {
+ cairo_set_line_width (cr, 3.0);
+ cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.6);
+ cairo_stroke_preserve (cr);
+
+ cairo_set_line_width (cr, 1.0);
+ cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.8);
+ cairo_stroke (cr);
+ }
+ else
+ {
+ cairo_set_line_width (cr, 1.0);
+ cairo_set_source_rgba (cr, 0.8, 0.8, 0.8, 0.8);
+ cairo_stroke (cr);
+ }
+
+ cairo_destroy (cr);
+}
+
+static void
+set_cross_cursor (GtkWidget *widget,
+ gboolean enabled)
+{
+ if (enabled)
+ gtk_widget_set_cursor_from_name (widget, "crosshair");
+ else
+ gtk_widget_set_cursor (widget, NULL);
+}
+
+static void
+adj_changed (GtkFontPlane *plane)
+{
+ gtk_widget_queue_draw (GTK_WIDGET (plane));
+}
+
+static void
+adjustment_set_normalized_value (GtkAdjustment *adj,
+ double val)
+{
+ gtk_adjustment_set_value (adj,
+ gtk_adjustment_get_lower (adj) +
+ val * (gtk_adjustment_get_upper (adj) - gtk_adjustment_get_lower (adj)));
+}
+
+static void
+update_value (GtkFontPlane *plane,
+ gint x,
+ gint y)
+{
+ GtkWidget *widget = GTK_WIDGET (plane);
+ gdouble u, v;
+
+ u = CLAMP (x * (1.0 / gtk_widget_get_allocated_width (widget)), 0, 1);
+ v = CLAMP (1 - y * (1.0 / gtk_widget_get_allocated_height (widget)), 0, 1);
+
+ adjustment_set_normalized_value (plane->width_adj, u);
+ adjustment_set_normalized_value (plane->weight_adj, v);
+
+ gtk_widget_queue_draw (widget);
+}
+
+static void
+hold_action (GtkGestureLongPress *gesture,
+ gdouble x,
+ gdouble y,
+ GtkFontPlane *plane)
+{
+ gboolean handled;
+
+ g_signal_emit_by_name (plane, "popup-menu", &handled);
+}
+
+static void
+plane_drag_gesture_begin (GtkGestureDrag *gesture,
+ gdouble start_x,
+ gdouble start_y,
+ GtkFontPlane *plane)
+{
+ guint button;
+
+ button = gtk_gesture_single_get_current_button (GTK_GESTURE_SINGLE (gesture));
+
+ if (button == GDK_BUTTON_SECONDARY)
+ {
+ gboolean handled;
+
+ g_signal_emit_by_name (plane, "popup-menu", &handled);
+ }
+
+ if (button != GDK_BUTTON_PRIMARY)
+ {
+ gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_DENIED);
+ return;
+ }
+
+ set_cross_cursor (GTK_WIDGET (plane), TRUE);
+ update_value (plane, start_x, start_y);
+ gtk_widget_grab_focus (GTK_WIDGET (plane));
+ gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED);
+}
+
+static void
+plane_drag_gesture_update (GtkGestureDrag *gesture,
+ gdouble offset_x,
+ gdouble offset_y,
+ GtkFontPlane *plane)
+{
+ gdouble start_x, start_y;
+
+ gtk_gesture_drag_get_start_point (GTK_GESTURE_DRAG (gesture),
+ &start_x, &start_y);
+ update_value (plane, start_x + offset_x, start_y + offset_y);
+}
+
+static void
+plane_drag_gesture_end (GtkGestureDrag *gesture,
+ gdouble offset_x,
+ gdouble offset_y,
+ GtkFontPlane *plane)
+{
+ set_cross_cursor (GTK_WIDGET (plane), FALSE);
+}
+
+static void
+gtk_font_plane_init (GtkFontPlane *plane)
+{
+ gtk_widget_set_has_window (GTK_WIDGET (plane), FALSE);
+ gtk_widget_set_can_focus (GTK_WIDGET (plane), TRUE);
+
+ plane->drag_gesture = gtk_gesture_drag_new (GTK_WIDGET (plane));
+ g_signal_connect (plane->drag_gesture, "drag-begin",
+ G_CALLBACK (plane_drag_gesture_begin), plane);
+ g_signal_connect (plane->drag_gesture, "drag-update",
+ G_CALLBACK (plane_drag_gesture_update), plane);
+ g_signal_connect (plane->drag_gesture, "drag-end",
+ G_CALLBACK (plane_drag_gesture_end), plane);
+ gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (plane->drag_gesture), 0);
+
+ plane->long_press_gesture = gtk_gesture_long_press_new (GTK_WIDGET (plane));
+ g_signal_connect (plane->long_press_gesture, "pressed",
+ G_CALLBACK (hold_action), plane);
+ gtk_gesture_single_set_touch_only (GTK_GESTURE_SINGLE (plane->long_press_gesture),
+ TRUE);
+}
+
+static void
+plane_finalize (GObject *object)
+{
+ GtkFontPlane *plane = GTK_FONT_PLANE (object);
+
+ g_clear_object (&plane->weight_adj);
+ g_clear_object (&plane->width_adj);
+
+ g_clear_object (&plane->drag_gesture);
+ g_clear_object (&plane->long_press_gesture);
+
+ G_OBJECT_CLASS (gtk_font_plane_parent_class)->finalize (object);
+}
+
+static void
+plane_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GtkFontPlane *plane = GTK_FONT_PLANE (object);
+ GObject *adjustment;
+
+ switch (prop_id)
+ {
+ case PROP_WEIGHT_ADJUSTMENT:
+ adjustment = g_value_get_object (value);
+ if (adjustment)
+ {
+ plane->weight_adj = g_object_ref_sink (adjustment);
+ g_signal_connect_swapped (adjustment, "value-changed", G_CALLBACK (adj_changed), plane);
+ }
+ break;
+ case PROP_WIDTH_ADJUSTMENT:
+ adjustment = g_value_get_object (value);
+ if (adjustment)
+ {
+ plane->width_adj = g_object_ref_sink (adjustment);
+ g_signal_connect_swapped (adjustment, "value-changed", G_CALLBACK (adj_changed), plane);
+ }
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gtk_font_plane_class_init (GtkFontPlaneClass *class)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (class);
+ GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
+
+ object_class->finalize = plane_finalize;
+ object_class->set_property = plane_set_property;
+
+ widget_class->snapshot = plane_snapshot;
+
+ g_object_class_install_property (object_class,
+ PROP_WEIGHT_ADJUSTMENT,
+ g_param_spec_object ("weight-adjustment",
+ NULL,
+ NULL,
+ GTK_TYPE_ADJUSTMENT,
+ G_PARAM_WRITABLE |
+ G_PARAM_CONSTRUCT_ONLY));
+
+ g_object_class_install_property (object_class,
+ PROP_WIDTH_ADJUSTMENT,
+ g_param_spec_object ("width-adjustment",
+ NULL,
+ NULL,
+ GTK_TYPE_ADJUSTMENT,
+ G_PARAM_WRITABLE |
+ G_PARAM_CONSTRUCT_ONLY));
+}
+
+GtkWidget *
+gtk_font_plane_new (GtkAdjustment *weight_adj,
+ GtkAdjustment *width_adj)
+{
+ return g_object_new (GTK_TYPE_FONT_PLANE,
+ "weight-adjustment", weight_adj,
+ "width-adjustment", width_adj,
+ NULL);
+}
diff --git a/demos/gtk-demo/fontplane.h b/demos/gtk-demo/fontplane.h
new file mode 100644
index 0000000..e9983a1
--- /dev/null
+++ b/demos/gtk-demo/fontplane.h
@@ -0,0 +1,65 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2012 Red Hat, Inc.
+ *
+ * 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 2 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 <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GTK_FONT_PLANE_H__
+#define __GTK_FONT_PLANE_H__
+
+#include <gtk/gtk.h>
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_FONT_PLANE (gtk_font_plane_get_type ())
+#define GTK_FONT_PLANE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_FONT_PLANE,
GtkFontPlane))
+#define GTK_FONT_PLANE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_FONT_PLANE,
GtkFontPlaneClass))
+#define GTK_IS_FONT_PLANE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_COLOR_PLANE))
+#define GTK_IS_FONT_PLANE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_COLOR_PLANE))
+#define GTK_FONT_PLANE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_FONT_PLANE,
GtkFontPlaneClass))
+
+
+typedef struct _GtkFontPlane GtkFontPlane;
+typedef struct _GtkFontPlaneClass GtkFontPlaneClass;
+
+struct _GtkFontPlane
+{
+ GtkWidget parent_instance;
+
+ GtkAdjustment *weight_adj;
+ GtkAdjustment *width_adj;
+
+ GtkGesture *drag_gesture;
+ GtkGesture *long_press_gesture;
+};
+
+struct _GtkFontPlaneClass
+{
+ GtkWidgetClass parent_class;
+
+ /* Padding for future expansion */
+ void (*_gtk_reserved1) (void);
+ void (*_gtk_reserved2) (void);
+ void (*_gtk_reserved3) (void);
+ void (*_gtk_reserved4) (void);
+};
+
+
+GType gtk_font_plane_get_type (void) G_GNUC_CONST;
+GtkWidget * gtk_font_plane_new (GtkAdjustment *width_adj,
+ GtkAdjustment *weight_adj);
+
+G_END_DECLS
+
+#endif /* __GTK_FONT_PLANE_H__ */
diff --git a/demos/gtk-demo/meson.build b/demos/gtk-demo/meson.build
index 0d57447..d68846e 100644
--- a/demos/gtk-demo/meson.build
+++ b/demos/gtk-demo/meson.build
@@ -74,7 +74,7 @@ demos = files([
gtkdemo_deps = [ libgtk_dep, ]
if harfbuzz_dep.found() and pangoft_dep.found()
- demos += files('font_features.c')
+ demos += files('font_features.c', 'font_explorer.c')
gtkdemo_deps += [ harfbuzz_dep, ]
endif
@@ -94,7 +94,7 @@ gtkdemo_resources = gnome.compile_resources('gtkdemo_resources',
source_dir: '.')
executable('gtk4-demo',
- 'main.c', 'gtkfishbowl.c', demos, demos_h, gtkdemo_resources,
+ 'main.c', 'gtkfishbowl.c', 'fontplane.c', demos, demos_h, gtkdemo_resources,
c_args: gtkdemo_args,
dependencies: gtkdemo_deps,
include_directories: confinc,
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