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Graduately/sprechen.c

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#include <gtk/gtk.h>
#include <math.h>
#define NUM_UNITS 12
#define FIRST_LOCKED 1
#define NODE_SIZE 88.0
#define PATH_SPAC 150.0
#define PATH_CYCLES 2.0
#define PATH_MARGIN 72.0
#define PATH_HEIGHT 380.0
#define PATH_AMP 100.0
static GtkStack *main_stack;
static double path_x_at(double t) {
return PATH_MARGIN + (NODE_SIZE / 2.0) + t * PATH_SPAC;
}
static double path_y_at(double t) {
double mid = PATH_HEIGHT / 2.0;
double phase = 2.0 * G_PI * PATH_CYCLES / (NUM_UNITS - 1);
return mid + PATH_AMP * sin(t * phase);
}
static void on_continue_clicked(GtkButton *button, gpointer user_data) {
gtk_stack_set_visible_child_name(main_stack, "roadmap");
}
static GtkWidget *build_welcome_page(void) {
GtkWidget *box;
GtkWidget *heading;
GtkWidget *card;
GtkWidget *button;
// Create a vertical box to hold contents
box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 18);
gtk_widget_set_halign(box, GTK_ALIGN_CENTER);
gtk_widget_set_valign(box, GTK_ALIGN_CENTER);
gtk_widget_set_margin_top(box, 40);
gtk_widget_set_margin_bottom(box, 40);
// Heading
heading = gtk_label_new(NULL);
gtk_label_set_markup(GTK_LABEL(heading),
"Vítejte ve <span color=\"#cba6f7\">Sprechen.C</span>!");
gtk_widget_set_halign(heading, GTK_ALIGN_CENTER);
gtk_widget_add_css_class(heading, "heading");
gtk_box_append(GTK_BOX(box), heading);
// Card with the welcome message
card = gtk_label_new(
"Sprechen.C je vzdělávací program na procvičování Němčiny, určený "
"pro studenty středních škol a gymnázií.\n\n"
"Program je napsaný v Céčku studentama ze SSŠVT!");
gtk_label_set_justify(GTK_LABEL(card), GTK_JUSTIFY_CENTER);
gtk_label_set_wrap(GTK_LABEL(card), TRUE);
gtk_label_set_max_width_chars(GTK_LABEL(card), 48);
gtk_widget_add_css_class(card, "card");
gtk_box_append(GTK_BOX(box), card);
// Continue button
button = gtk_button_new_with_label("Pokračuj");
gtk_widget_set_halign(button, GTK_ALIGN_CENTER);
gtk_widget_set_margin_top(button, 6);
gtk_widget_add_css_class(button, "btn-primary");
gtk_box_append(GTK_BOX(box), button);
g_signal_connect(button, "clicked", G_CALLBACK(on_continue_clicked), NULL);
return box;
}
static void draw_rail(GtkDrawingArea *area, cairo_t *cr,
int width, int height, gpointer user_data) {
const int segments = (NUM_UNITS - 1) * 60;
const double t_end = (double)(NUM_UNITS - 1);
const double t_lit = (double)(FIRST_LOCKED - 1);
int k;
(void)area;
(void)width;
(void)height;
(void)user_data;
cairo_set_operator(cr, CAIRO_OPERATOR_CLEAR);
cairo_paint(cr);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
cairo_set_line_cap(cr, CAIRO_LINE_CAP_ROUND);
cairo_set_line_join(cr, CAIRO_LINE_JOIN_ROUND);
cairo_new_path(cr);
cairo_move_to(cr, path_x_at(0), path_y_at(0));
for (k = 1; k <= segments; k++) {
double t = t_end * (double)k / (double)segments;
cairo_line_to(cr, path_x_at(t), path_y_at(t));
}
cairo_set_line_width(cr, 16);
cairo_set_source_rgb(cr, 0.27059, 0.27843, 0.35294);
cairo_stroke(cr);
if (t_lit > 0.0) {
int lit_segments = (int)(t_lit / t_end * (double)segments + 0.5);
cairo_new_path(cr);
cairo_move_to(cr, path_x_at(0), path_y_at(0));
for (k = 1; k <= lit_segments; k++) {
double t = t_end * (double)k / (double)segments;
cairo_line_to(cr, path_x_at(t), path_y_at(t));
}
cairo_set_source_rgba(cr, 0.79608, 0.65098, 0.96863, 0.20);
cairo_set_line_width(cr, 36);
cairo_stroke_preserve(cr);
cairo_set_source_rgb(cr, 0.79608, 0.65098, 0.96863);
cairo_set_line_width(cr, 16);
cairo_stroke(cr);
}
}
static void add_path_node(GtkFixed *fixed, int index) {
int num = index + 1;
gboolean locked = index >= FIRST_LOCKED;
double cx = path_x_at(index);
double cy = path_y_at(index);
GtkWidget *card;
GtkWidget *vbox;
GtkWidget *number;
char *text;
card = gtk_button_new();
gtk_widget_add_css_class(card, "unit-node");
gtk_widget_set_sensitive(card, !locked);
gtk_widget_set_size_request(card, (int)NODE_SIZE, (int)NODE_SIZE);
if (locked)
gtk_widget_add_css_class(card, "locked");
vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 2);
gtk_widget_set_halign(vbox, GTK_ALIGN_CENTER);
gtk_widget_set_valign(vbox, GTK_ALIGN_CENTER);
gtk_button_set_child(GTK_BUTTON(card), vbox);
text = g_strdup_printf("%d", num);
number = gtk_label_new(text);
g_free(text);
gtk_widget_add_css_class(number, "unit-number");
gtk_box_append(GTK_BOX(vbox), number);
if (locked) {
GtkWidget *lock;
lock = gtk_image_new_from_icon_name("system-lock-screen-symbolic");
gtk_image_set_pixel_size(GTK_IMAGE(lock), 16);
gtk_widget_add_css_class(lock, "lock-icon");
gtk_box_append(GTK_BOX(vbox), lock);
}
text = g_strdup_printf("Jednotka %d%s", num, locked ? " (zamčeno)" : "");
gtk_widget_set_tooltip_text(card, text);
g_free(text);
gtk_fixed_put(fixed, card,
(int)(cx - NODE_SIZE / 2.0),
(int)(cy - NODE_SIZE / 2.0));
}
static GtkWidget *build_roadmap_page(void) {
GtkWidget *page;
GtkWidget *heading;
GtkWidget *sub;
GtkWidget *scroll;
GtkWidget *wrap;
GtkWidget *fixed;
GtkWidget *rail;
int canvas_w;
int i;
canvas_w = (int)(path_x_at(NUM_UNITS - 1) + PATH_MARGIN);
page = gtk_box_new(GTK_ORIENTATION_VERTICAL, 4);
gtk_widget_set_hexpand(page, TRUE);
gtk_widget_set_vexpand(page, TRUE);
gtk_widget_set_margin_start(page, 32);
gtk_widget_set_margin_end(page, 32);
gtk_widget_set_margin_top(page, 28);
gtk_widget_set_margin_bottom(page, 24);
heading = gtk_label_new("Učební plán");
gtk_widget_set_halign(heading, GTK_ALIGN_CENTER);
gtk_widget_add_css_class(heading, "roadmap-title");
gtk_box_append(GTK_BOX(page), heading);
sub = gtk_label_new("Vyberte jednotku na cestě a začněte procvičovat.");
gtk_widget_set_halign(sub, GTK_ALIGN_CENTER);
gtk_widget_add_css_class(sub, "roadmap-sub");
gtk_box_append(GTK_BOX(page), sub);
scroll = gtk_scrolled_window_new();
gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll),
GTK_POLICY_AUTOMATIC, GTK_POLICY_NEVER);
gtk_widget_set_vexpand(scroll, TRUE);
gtk_widget_set_margin_top(scroll, 18);
gtk_box_append(GTK_BOX(page), scroll);
wrap = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
gtk_widget_set_vexpand(wrap, TRUE);
gtk_scrolled_window_set_child(GTK_SCROLLED_WINDOW(scroll), wrap);
fixed = gtk_fixed_new();
gtk_widget_set_halign(fixed, GTK_ALIGN_START);
gtk_widget_set_valign(fixed, GTK_ALIGN_CENTER);
gtk_widget_set_size_request(fixed, canvas_w, (int)PATH_HEIGHT);
gtk_box_append(GTK_BOX(wrap), fixed);
rail = gtk_drawing_area_new();
gtk_widget_set_size_request(rail, canvas_w, (int)PATH_HEIGHT);
gtk_drawing_area_set_draw_func(GTK_DRAWING_AREA(rail), draw_rail, NULL, NULL);
gtk_fixed_put(GTK_FIXED(fixed), rail, 0, 0);
for (i = 0; i < NUM_UNITS; i++)
add_path_node(GTK_FIXED(fixed), i);
return page;
}
static void activate(GtkApplication *app, gpointer user_data) {
GtkWindow *window;
GtkWidget *headerbar;
GtkWidget *title_label;
GtkWidget *welcome_page;
GtkWidget *roadmap_page;
GtkCssProvider *provider;
// Create a new application window
window = GTK_WINDOW(gtk_application_window_new(app));
gtk_window_set_title(window, "Sprechen.c");
gtk_window_set_default_size(window, 760, 560);
// Create a styled headerbar (titlebar)
headerbar = gtk_header_bar_new();
gtk_widget_add_css_class(headerbar, "titlebar");
title_label = gtk_label_new("Sprechen.c");
gtk_widget_add_css_class(title_label, "app-title");
gtk_header_bar_set_title_widget(GTK_HEADER_BAR(headerbar), title_label);
gtk_window_set_titlebar(window, headerbar);
// Stack navigation between welcome and roadmap pages
main_stack = GTK_STACK(gtk_stack_new());
gtk_stack_set_transition_type(GTK_STACK(main_stack),
GTK_STACK_TRANSITION_TYPE_CROSSFADE);
gtk_window_set_child(window, GTK_WIDGET(main_stack));
welcome_page = build_welcome_page();
roadmap_page = build_roadmap_page();
gtk_stack_add_named(main_stack, welcome_page, "welcome");
gtk_stack_add_named(main_stack, roadmap_page, "roadmap");
gtk_stack_set_visible_child_name(main_stack, "welcome");
// Load Catppuccin Mocha CSS
provider = gtk_css_provider_new();
gtk_css_provider_load_from_string(provider,
"window {"
" background-color: #1e1e2e;"
" background-image: linear-gradient(160deg, #11111b 0%, #1e1e2e 40%, #313244 100%);"
"}"
".titlebar {"
" background-color: #1e1e2e;"
" background-image: none;"
" box-shadow: none;"
" border: none;"
"}"
".app-title {"
" color: #cdd6f4;"
" font-weight: 700;"
" font-size: 14px;"
"}"
".heading {"
" color: #cdd6f4;"
" font-size: 32px;"
" font-weight: 800;"
"}"
".card {"
" background-color: rgba(49, 50, 68, 0.92);"
" border: 1px solid #45475a;"
" border-radius: 18px;"
" padding: 30px 34px;"
" color: #cdd6f4;"
" font-size: 16px;"
"}"
".btn-primary {"
" background-image: linear-gradient(135deg, #cba6f7 0%, #b4befe 100%);"
" color: #1e1e2e;"
" font-size: 16px;"
" font-weight: 700;"
" padding: 12px 40px;"
" border: none;"
" border-radius: 999px;"
" box-shadow: 0 6px 18px rgba(203, 166, 247, 0.25);"
" transition: box-shadow 150ms ease, background-image 150ms ease;"
"}"
".btn-primary:hover {"
" box-shadow: 0 8px 24px rgba(203, 166, 247, 0.45);"
" background-image: linear-gradient(135deg, #b4befe 0%, #89b4fa 100%);"
"}"
".btn-primary:active {"
" box-shadow: 0 3px 10px rgba(203, 166, 247, 0.35);"
"}"
".roadmap-title {"
" color: #cdd6f4;"
" font-size: 28px;"
" font-weight: 800;"
"}"
".roadmap-sub {"
" color: #a6adc8;"
" font-size: 14px;"
"}"
".unit-node {"
" background-image: linear-gradient(135deg, #cba6f7 0%, #b4befe 100%);"
" color: #1e1e2e;"
" border: none;"
" border-radius: 999px;"
" padding: 0;"
" box-shadow: 0 4px 16px rgba(203, 166, 247, 0.35), 0 0 0 1px rgba(203, 166, 247, 0.25);"
" transition: transform 150ms ease, box-shadow 150ms ease;"
"}"
".unit-node:hover {"
" transform: translateY(-3px);"
" box-shadow: 0 10px 26px rgba(203, 166, 247, 0.55), 0 0 0 2px rgba(203, 166, 247, 0.35);"
"}"
".unit-node:active {"
" transform: translateY(0px);"
" box-shadow: 0 4px 12px rgba(203, 166, 247, 0.45);"
"}"
".unit-node.locked {"
" background-image: none;"
" background-color: #313244;"
" color: #a6adc8;"
" border: 1px solid #45475a;"
" box-shadow: none;"
"}"
".unit-node.locked:hover {"
" transform: none;"
" box-shadow: none;"
"}"
".unit-number {"
" font-size: 24px;"
" font-weight: 800;"
"}"
".unit-node.locked .unit-number {"
" color: #a6adc8;"
"}"
".lock-icon {"
" color: #6c7086;"
"}"
);
// Apply CSS to the window
gtk_style_context_add_provider_for_display(
gdk_display_get_default(),
GTK_STYLE_PROVIDER(provider),
GTK_STYLE_PROVIDER_PRIORITY_USER);
g_object_unref(provider);
gtk_window_present(window);
}
int main(int argc, char **argv) {
GtkApplication *app;
int status;
app = gtk_application_new("org.example.Sprechen", G_APPLICATION_DEFAULT_FLAGS);
g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);
status = g_application_run(G_APPLICATION(app), argc, argv);
g_object_unref(app);
return status;
}
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