Add a font features demo
This started life as a standalone tool, but it is nicer to have it integrated in gtk3-demo.
This commit is contained in:
Matthias Clasen
@ -25,6 +25,7 @@ demos = \
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entry_completion.c \
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event_axes.c \
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expander.c \
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font_features.c \
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gestures.c \
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glarea.c \
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headerbar.c \
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@ -183,4 +183,7 @@
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<file>glarea-fragment.glsl</file>
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<file>glarea-vertex.glsl</file>
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</gresource>
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<gresource prefix="/font-features">
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<file>font-features.ui</file>
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</gresource>
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</gresources>
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1346
demos/gtk-demo/font-features.ui
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1346
demos/gtk-demo/font-features.ui
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File diff suppressed because it is too large
Load Diff
202
demos/gtk-demo/font_features.c
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202
demos/gtk-demo/font_features.c
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@ -0,0 +1,202 @@
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/* Font Features
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*
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* This demonstrates support for OpenType font features with
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* Pango attributes. The attributes can be used manually or
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* via Pango markup.
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*/
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#include <gtk/gtk.h>
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static GtkWidget *label;
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static GtkWidget *settings;
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static GtkWidget *font;
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static GtkWidget *resetbutton;
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static GtkWidget *numcasedefault;
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static GtkWidget *numspacedefault;
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static GtkWidget *fractiondefault;
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static GtkWidget *stack;
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static GtkWidget *entry;
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static GtkWidget *toggle[24];
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static void
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update (void)
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{
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GString *s;
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char *font_desc;
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char *font_settings;
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const char *text;
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gboolean has_feature;
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int i;
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text = gtk_entry_get_text (GTK_ENTRY (entry));
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font_desc = gtk_font_chooser_get_font (GTK_FONT_CHOOSER (font));
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s = g_string_new ("");
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has_feature = FALSE;
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for (i = 0; i < 24; i++)
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{
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if (!gtk_widget_is_sensitive (toggle[i]))
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continue;
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if (GTK_IS_RADIO_BUTTON (toggle[i]))
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{
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if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (toggle[i])))
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{
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if (has_feature)
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g_string_append (s, ", ");
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g_string_append (s, gtk_buildable_get_name (GTK_BUILDABLE (toggle[i])));
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g_string_append (s, " 1");
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has_feature = TRUE;
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}
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}
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else
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{
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if (has_feature)
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g_string_append (s, ", ");
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g_string_append (s, gtk_buildable_get_name (GTK_BUILDABLE (toggle[i])));
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if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (toggle[i])))
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g_string_append (s, " 1");
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else
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g_string_append (s, " 0");
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has_feature = TRUE;
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}
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}
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font_settings = g_string_free (s, FALSE);
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gtk_label_set_text (GTK_LABEL (settings), font_settings);
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s = g_string_new ("");
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g_string_append_printf (s, "<span font_desc='%s' font_features='%s'>%s</span>", font_desc, font_settings, text);
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gtk_label_set_markup (GTK_LABEL (label), s->str);
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g_string_free (s, TRUE);
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g_free (font_desc);
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g_free (font_settings);
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}
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static void
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reset (void)
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{
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int i;
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (numcasedefault), TRUE);
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (numspacedefault), TRUE);
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (fractiondefault), TRUE);
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for (i = 0; i < 24; i++)
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{
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if (!GTK_IS_RADIO_BUTTON (toggle[i]))
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{
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle[i]), FALSE);
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gtk_widget_set_sensitive (toggle[i], FALSE);
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}
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}
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}
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static char *text;
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static void
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switch_to_entry (void)
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{
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text = g_strdup (gtk_entry_get_text (GTK_ENTRY (entry)));
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gtk_stack_set_visible_child_name (GTK_STACK (stack), "entry");
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}
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static void
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switch_to_label (void)
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{
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g_free (text);
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text = NULL;
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gtk_stack_set_visible_child_name (GTK_STACK (stack), "label");
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update ();
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}
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static gboolean
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entry_key_press (GtkEntry *entry, GdkEventKey *event)
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{
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if (event->keyval == GDK_KEY_Escape)
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{
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gtk_entry_set_text (GTK_ENTRY (entry), text);
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switch_to_label ();
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return GDK_EVENT_STOP;
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}
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return GDK_EVENT_PROPAGATE;
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}
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GtkWidget *
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do_font_features (GtkWidget *do_widget)
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{
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static GtkWidget *window = NULL;
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if (!window)
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{
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GtkBuilder *builder;
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int i;
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builder = gtk_builder_new_from_resource ("/font-features/font-features.ui");
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gtk_builder_add_callback_symbol (builder, "update", update);
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gtk_builder_add_callback_symbol (builder, "reset", reset);
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gtk_builder_add_callback_symbol (builder, "switch_to_entry", switch_to_entry);
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gtk_builder_add_callback_symbol (builder, "switch_to_label", switch_to_label);
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gtk_builder_add_callback_symbol (builder, "entry_key_press", G_CALLBACK (entry_key_press));
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gtk_builder_connect_signals (builder, NULL);
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window = GTK_WIDGET (gtk_builder_get_object (builder, "window"));
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label = GTK_WIDGET (gtk_builder_get_object (builder, "label"));
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settings = GTK_WIDGET (gtk_builder_get_object (builder, "settings"));
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resetbutton = GTK_WIDGET (gtk_builder_get_object (builder, "reset"));
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font = GTK_WIDGET (gtk_builder_get_object (builder, "font"));
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numcasedefault = GTK_WIDGET (gtk_builder_get_object (builder, "numcasedefault"));
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numspacedefault = GTK_WIDGET (gtk_builder_get_object (builder, "numspacedefault"));
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fractiondefault = GTK_WIDGET (gtk_builder_get_object (builder, "fractiondefault"));
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stack = GTK_WIDGET (gtk_builder_get_object (builder, "stack"));
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entry = GTK_WIDGET (gtk_builder_get_object (builder, "entry"));
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i = 0;
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "kern"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "liga"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "dlig"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "hlig"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "clig"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "smcp"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "c2sc"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "lnum"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "onum"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "pnum"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "tnum"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "frac"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "afrc"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "zero"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "nalt"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "swsh"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "calt"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "hist"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "salt"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "ss01"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "ss02"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "ss03"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "ss04"));
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toggle[i++] = GTK_WIDGET (gtk_builder_get_object (builder, "ss05"));
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update ();
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}
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if (!gtk_widget_get_visible (window))
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{
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gtk_window_present (GTK_WINDOW (window));
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}
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else
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{
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gtk_widget_destroy (window);
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window = NULL;
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}
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return window;
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}
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