Add an unnecessarily fancy about dialog

This commit is contained in:
Přemysl Eric Janouch 2022-01-09 18:36:27 +01:00
parent 12e3c42888
commit 4f19a67da3
Signed by: p
GPG Key ID: A0420B94F92B9493
3 changed files with 261 additions and 1 deletions

View File

@ -989,7 +989,7 @@ fiv_browser_button_press_event(GtkWidget *widget, GdkEventButton *event)
}
}
gboolean
static gboolean
fiv_browser_motion_notify_event(GtkWidget *widget, GdkEventMotion *event)
{
GTK_WIDGET_CLASS(fiv_browser_parent_class)

257
fiv.c
View File

@ -206,6 +206,252 @@ make_key_window(void)
return window;
}
// --- About -------------------------------------------------------------------
static void
on_about_map(GtkWidget *widget, G_GNUC_UNUSED gpointer user_data)
{
GdkFrameClock *clock = gtk_widget_get_frame_clock(widget);
(void) g_signal_connect_swapped(
clock, "update", G_CALLBACK(gtk_widget_queue_draw), widget);
gdk_frame_clock_begin_updating(clock);
}
static void
on_about_unmap(GtkWidget *widget, G_GNUC_UNUSED gpointer user_data)
{
GdkFrameClock *clock = gtk_widget_get_frame_clock(widget);
gdk_frame_clock_end_updating(clock);
}
static gint g_about_x, g_about_y;
static gboolean
on_about_motion(G_GNUC_UNUSED GtkWidget *widget, GdkEventMotion *event,
G_GNUC_UNUSED gpointer user_data)
{
g_about_x = event->x;
g_about_y = event->y;
return FALSE;
}
static gboolean
on_about_leave(G_GNUC_UNUSED GtkWidget *widget,
G_GNUC_UNUSED GdkEventCrossing *event, G_GNUC_UNUSED gpointer user_data)
{
g_about_x = 0;
g_about_y = 0;
return FALSE;
}
enum { ABOUT_SIZE = 48, ABOUT_SCALE = 3, ABOUT_HEIGHT = ABOUT_SIZE * 4 / 3 };
// The mismatching resolution is incidental, and kept for interesting looks.
cairo_pattern_t *
make_infinite_v_pattern(void)
{
cairo_surface_t *surface =
cairo_image_surface_create(CAIRO_FORMAT_ARGB32, ABOUT_SIZE, ABOUT_SIZE);
cairo_t *cr = cairo_create(surface);
cairo_move_to(cr, 2, 7);
cairo_rel_line_to(cr, 44, 0);
cairo_rel_line_to(cr, -17, 39);
cairo_rel_line_to(cr, -10, 0);
cairo_close_path(cr);
cairo_pattern_t *gradient = cairo_pattern_create_linear(0, 7, 0, 46);
cairo_pattern_add_color_stop_rgba(gradient, 1, 1, 0x66 / 255., 0, 1);
cairo_pattern_add_color_stop_rgba(gradient, 0, 1, 0xaa / 255., 0, 1);
cairo_set_source(cr, gradient);
cairo_fill(cr);
cairo_destroy(cr);
cairo_pattern_t *pattern = cairo_pattern_create_for_surface(surface);
cairo_surface_destroy(surface);
cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
cairo_pattern_set_filter(pattern, CAIRO_FILTER_NEAREST);
cairo_matrix_t matrix = {};
cairo_matrix_init_translate(&matrix, ABOUT_SIZE / 2, 0);
cairo_pattern_set_matrix(pattern, &matrix);
return pattern;
}
static void
draw_ligature(cairo_t *cr)
{
// Transcribed fiv.svg--it would arguably make more sense to generate
// that file and these Cairo instructions from the same source.
cairo_move_to(cr, 12.5, 20.5);
cairo_rel_line_to(cr, -4, 0);
cairo_rel_line_to(cr, 0, +5);
cairo_rel_line_to(cr, +4, 0);
cairo_rel_line_to(cr, 0, +15);
cairo_rel_line_to(cr, 9, 0);
cairo_rel_line_to(cr, 0, -15);
cairo_rel_line_to(cr, +2, 0);
cairo_rel_line_to(cr, 0, -5);
cairo_rel_line_to(cr, -2, 0);
cairo_rel_line_to(cr, 0, -8);
cairo_rel_curve_to(cr, 0, -4, 5, -4, 5, 0);
cairo_rel_curve_to(cr, 0, 6, 9, 6, 9, 0);
cairo_rel_curve_to(cr, 0, -12, -23, -12, -23, 0);
cairo_close_path(cr);
cairo_move_to(cr, 26.5, 20.5);
cairo_rel_line_to(cr, 9, 0);
cairo_rel_line_to(cr, 0, 20);
cairo_rel_line_to(cr, -9, 0);
cairo_close_path(cr);
cairo_path_t *ligature = cairo_copy_path(cr);
cairo_save(cr);
cairo_clip(cr);
// Shadow approximation, given the lack of filters in Cairo.
enum { STEPS = 5 };
for (int i = 0; i <= STEPS; i++) {
cairo_save(cr);
double o = 1. / ABOUT_SCALE + 1. / ABOUT_SCALE * i;
cairo_translate(cr, o, o);
cairo_append_path(cr, ligature);
double v = 1 - (STEPS - i) * 0.075;
cairo_set_source_rgb(cr, v, v, v);
cairo_fill(cr);
cairo_restore(cr);
}
cairo_restore(cr);
cairo_append_path(cr, ligature);
cairo_path_destroy(ligature);
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_set_line_width(cr, 1);
cairo_stroke(cr);
}
static gboolean
on_about_draw(GtkWidget *widget, cairo_t *cr, G_GNUC_UNUSED gpointer user_data)
{
GtkAllocation allocation;
gtk_widget_get_allocation(widget, &allocation);
GtkStyleContext *style = gtk_widget_get_style_context(widget);
gtk_render_background(style, cr, 0, 0, allocation.width, allocation.height);
cairo_translate(cr, (allocation.width - ABOUT_SIZE * ABOUT_SCALE) / 2,
ABOUT_SIZE * ABOUT_SCALE / 4);
cairo_scale(cr, ABOUT_SCALE, ABOUT_SCALE);
cairo_save(cr);
cairo_translate(cr, ABOUT_SIZE / 2, ABOUT_SIZE / 2);
if (g_about_x && g_about_y) {
gint dx = g_about_x - allocation.width / 2;
gint dy = g_about_y - ABOUT_SIZE * ABOUT_SCALE * 3 / 4;
cairo_rotate(cr, atan2(dy, dx) - M_PI_2);
}
GdkFrameClock *clock = gtk_widget_get_frame_clock(widget);
gint64 t = gdk_frame_clock_get_frame_time(clock);
cairo_translate(cr, 0, (gint64) (t / 4e4) % ABOUT_SIZE);
cairo_pattern_t *v = make_infinite_v_pattern();
cairo_set_source(cr, v);
cairo_paint(cr);
cairo_save(cr);
cairo_translate(cr, ABOUT_SIZE / 2, 14 /* Through trial and error. */);
cairo_scale(cr, 1, -1);
cairo_set_source(cr, v);
cairo_paint(cr);
cairo_restore(cr);
cairo_pattern_destroy(v);
cairo_restore(cr);
draw_ligature(cr);
return TRUE;
}
static GtkWidget *
make_about_dialog(GtkWidget *parent)
{
GtkWidget *dialog = gtk_widget_new(GTK_TYPE_DIALOG, "use-header-bar", TRUE,
"title", "About", "transient-for", parent, "destroy-with-parent", TRUE,
NULL);
GtkWidget *area = gtk_drawing_area_new();
gtk_style_context_add_class(gtk_widget_get_style_context(area), "view");
gtk_widget_set_size_request(
area, ABOUT_SIZE * ABOUT_SCALE * 2, ABOUT_HEIGHT * ABOUT_SCALE);
gtk_widget_add_events(
area, GDK_POINTER_MOTION_MASK | GDK_LEAVE_NOTIFY_MASK);
g_signal_connect(
area, "motion-notify-event", G_CALLBACK(on_about_motion), NULL);
g_signal_connect(
area, "leave-notify-event", G_CALLBACK(on_about_leave), NULL);
g_signal_connect(area, "draw", G_CALLBACK(on_about_draw), NULL);
g_signal_connect(area, "map", G_CALLBACK(on_about_map), NULL);
g_signal_connect(area, "unmap", G_CALLBACK(on_about_unmap), NULL);
// The rest is approximately copying GTK+'s own gtkaboutdialog.ui.
GtkWidget *name = gtk_label_new(NULL);
gtk_label_set_selectable(GTK_LABEL(name), TRUE);
gtk_label_set_markup(
GTK_LABEL(name), "<b>" PROJECT_NAME "</b> " PROJECT_VERSION);
GtkWidget *website = gtk_label_new(NULL);
gtk_label_set_selectable(GTK_LABEL(website), TRUE);
const char *url = "https://git.janouch.name/p/fiv";
gchar *link = g_strdup_printf("<a href='%s'>%s</a>", url, url);
gtk_label_set_markup(GTK_LABEL(website), link);
g_free(link);
GtkWidget *sw = gtk_scrolled_window_new(NULL, NULL);
gtk_scrolled_window_set_policy(
GTK_SCROLLED_WINDOW(sw), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
gtk_scrolled_window_set_shadow_type(GTK_SCROLLED_WINDOW(sw), GTK_SHADOW_IN);
GtkWidget *viewer = gtk_text_view_new();
gtk_text_view_set_editable(GTK_TEXT_VIEW(viewer), FALSE);
gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(viewer), FALSE);
gtk_text_view_set_left_margin(GTK_TEXT_VIEW(viewer), 8);
gtk_text_view_set_right_margin(GTK_TEXT_VIEW(viewer), 8);
gtk_container_add(GTK_CONTAINER(sw), viewer);
GBytes *license =
g_resources_lookup_data("/LICENSE", G_RESOURCE_LOOKUP_FLAGS_NONE, NULL);
g_return_val_if_fail(license != NULL, dialog);
gchar *escaped = g_markup_escape_text(g_bytes_get_data(license, NULL), -1);
g_bytes_unref(license);
GtkTextBuffer *buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(viewer));
gchar *formatted = g_strdup_printf("<small>%s</small>", escaped);
g_free(escaped);
GtkTextIter iter = {};
gtk_text_buffer_get_start_iter(buffer, &iter);
gtk_text_buffer_insert_markup(buffer, &iter, formatted, -1);
g_free(formatted);
enum { SUBBOX_MARGIN = 12 /* Roughly matches. */ };
GtkWidget *subbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 12);
gtk_widget_set_margin_start(subbox, SUBBOX_MARGIN);
gtk_widget_set_margin_end(subbox, SUBBOX_MARGIN);
gtk_box_pack_start(GTK_BOX(subbox), name, FALSE, FALSE, 0);
gtk_box_pack_start(GTK_BOX(subbox), website, FALSE, FALSE, 0);
gtk_box_pack_start(GTK_BOX(subbox), sw, TRUE, TRUE, 0);
GtkWidget *box = gtk_dialog_get_content_area(GTK_DIALOG(dialog));
gtk_box_pack_start(GTK_BOX(box), area, FALSE, FALSE, 0);
gtk_box_pack_end(GTK_BOX(box), subbox, TRUE, TRUE, SUBBOX_MARGIN);
gtk_window_set_default_size(GTK_WINDOW(dialog), -1, 480);
gtk_window_set_geometry_hints(GTK_WINDOW(dialog), NULL,
&(GdkGeometry) {.max_width = -1, .max_height = G_MAXSHORT},
GDK_HINT_MAX_SIZE);
gtk_widget_grab_focus(viewer);
return dialog;
}
// --- Main --------------------------------------------------------------------
// TODO(p): See if it's possible to give separators room to shrink
@ -820,6 +1066,17 @@ on_key_press(G_GNUC_UNUSED GtkWidget *widget, GdkEventKey *event,
return TRUE;
}
break;
case GDK_SHIFT_MASK:
switch (event->keyval) {
case GDK_KEY_F1: {
GtkWidget *dialog = make_about_dialog(g.window);
gtk_widget_show_all(dialog);
gtk_dialog_run(GTK_DIALOG(dialog));
gtk_widget_destroy(dialog);
return TRUE;
}
}
break;
case 0:
switch (event->keyval) {
case GDK_KEY_Escape:

View File

@ -1,5 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?>
<gresources>
<gresource prefix="/">
<file alias="LICENSE">../LICENSE</file>
</gresource>
<gresource prefix="/org/gnome/design/IconLibrary/scalable/actions/">
<file preprocess="xml-stripblanks">circle-filled-symbolic.svg</file>
<file preprocess="xml-stripblanks">funnel-symbolic.svg</file>