prepared the czech subject

czech.c

@@ -0,0 +1,152 @@
+#include "maturita.h"
+
+/* ---- Czech language and literature (Český jazyk a literatura) ----- */
+
+#define CZ_NODES   3
+#define CZ_BUBBLE  SUB_BUBBLE
+#define CZ_LABEL_W 200.0
+#define CZ_CW      600
+#define CZ_CH      470
+
+static const char *cz_keys[CZ_NODES] = {
+    "Literatura", "Mluvnice", "Maturitní četba",
+};
+static const char *cz_initials[CZ_NODES] = {
+    "L", "M", "Č",
+};
+
+static GtkWidget *cz_rail;
+static double cz_cx[CZ_NODES];
+static double cz_cy[CZ_NODES];
+
+static void cz_geometry(void) {
+    cz_cx[0] = 300.0; cz_cy[0] = 120.0;   /* Literatura           (top) */
+    cz_cx[1] = 140.0; cz_cy[1] = 350.0;   /* Mluvnice   (bottom-left)   */
+    cz_cx[2] = 460.0; cz_cy[2] = 350.0;   /* Maturitní četba (bottom-right) */
+}
+
+/* Three bubbles joined into a triangle by thick rails. */
+static void draw_cz_rail(GtkDrawingArea *area, cairo_t *cr,
+                         int width, int height, gpointer data) {
+    const Rgb rail = color_from_hex(app_theme.rail);
+    const Rgb slate = color_from_hex(app_theme.surface1);
+
+    (void)area;
+    (void)width;
+    (void)height;
+    (void)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, cz_cx[0], cz_cy[0]);
+    cairo_line_to(cr, cz_cx[1], cz_cy[1]);
+    cairo_line_to(cr, cz_cx[2], cz_cy[2]);
+    cairo_close_path(cr);
+
+    cairo_set_line_width(cr, 14);
+    cairo_set_source_rgb(cr, rail.r, rail.g, rail.b);
+    cairo_stroke_preserve(cr);
+
+    cairo_set_line_width(cr, 9);
+    cairo_set_source_rgb(cr, slate.r, slate.g, slate.b);
+    cairo_stroke(cr);
+}
+
+void czech_rail_theme_reset(void) {
+    if (cz_rail)
+        gtk_widget_queue_draw(cz_rail);
+}
+
+static GtkWidget *cz_make_node(int index) {
+    GtkWidget *btn;
+    GtkWidget *label;
+
+    btn = gtk_button_new();
+    gtk_widget_add_css_class(btn, "unit-node");
+    gtk_widget_add_css_class(btn, "current");
+    gtk_widget_set_can_focus(btn, FALSE);
+    gtk_widget_set_size_request(btn, (int)CZ_BUBBLE, (int)CZ_BUBBLE);
+
+    label = gtk_label_new(cz_initials[index]);
+    gtk_widget_add_css_class(label, "unit-number");
+    gtk_button_set_child(GTK_BUTTON(btn), label);
+
+    return btn;
+}
+
+GtkWidget *build_czechmap_page(void) {
+    GtkWidget *page;
+    GtkWidget *scroll;
+    GtkWidget *wrap;
+    GtkWidget *fixed;
+    GtkWidget *rail;
+
+    cz_geometry();
+
+    page = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
+    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, 24);
+    gtk_widget_set_margin_bottom(page, 24);
+
+    gtk_box_append(GTK_BOX(page),
+                   top_bar("subjects", "Český jazyk a literatura",
+                           "czech_sub"));
+
+    scroll = gtk_scrolled_window_new();
+    gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll),
+                                   GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
+    gtk_widget_set_vexpand(scroll, TRUE);
+    gtk_widget_set_margin_top(scroll, 14);
+    gtk_box_append(GTK_BOX(page), scroll);
+
+    wrap = gtk_center_box_new();
+    gtk_widget_set_vexpand(wrap, TRUE);
+    gtk_widget_set_hexpand(wrap, TRUE);
+    gtk_scrolled_window_set_child(GTK_SCROLLED_WINDOW(scroll), wrap);
+
+    fixed = gtk_fixed_new();
+    gtk_widget_set_halign(fixed, GTK_ALIGN_CENTER);
+    gtk_widget_set_valign(fixed, GTK_ALIGN_CENTER);
+    gtk_widget_set_size_request(fixed, CZ_CW, CZ_CH);
+    gtk_center_box_set_center_widget(GTK_CENTER_BOX(wrap), fixed);
+
+    rail = gtk_drawing_area_new();
+    gtk_widget_set_size_request(rail, CZ_CW, CZ_CH);
+    gtk_drawing_area_set_draw_func(GTK_DRAWING_AREA(rail), draw_cz_rail,
+                                   NULL, NULL);
+    gtk_fixed_put(GTK_FIXED(fixed), rail, 0, 0);
+    cz_rail = rail;
+
+    for (int i = 0; i < CZ_NODES; i++) {
+        GtkWidget *btn = cz_make_node(i);
+        GtkWidget *name = gtk_label_new(NULL);
+
+        i18n_bind(name, cz_keys[i], 0);
+        gtk_widget_set_size_request(name, (int)CZ_LABEL_W, -1);
+        gtk_widget_set_halign(name, GTK_ALIGN_CENTER);
+        gtk_label_set_justify(GTK_LABEL(name), GTK_JUSTIFY_CENTER);
+        gtk_label_set_wrap(GTK_LABEL(name), TRUE);
+        gtk_widget_add_css_class(name, "unit-name");
+        gtk_widget_add_css_class(name, "cz-label");
+
+        gtk_fixed_put(GTK_FIXED(fixed), btn, 0, 0);
+        gtk_fixed_put(GTK_FIXED(fixed), name, 0, 0);
+
+        gtk_fixed_move(GTK_FIXED(fixed), btn,
+                       (int)(cz_cx[i] - CZ_BUBBLE / 2.0),
+                       (int)(cz_cy[i] - CZ_BUBBLE / 2.0));
+        gtk_fixed_move(GTK_FIXED(fixed), name,
+                       (int)(cz_cx[i] - CZ_LABEL_W / 2.0),
+                       (int)(cz_cy[i] + CZ_BUBBLE / 2.0 + 10.0));
+    }
+
+    return page;
+}

i18n.c

@@ -369,6 +369,11 @@ const TrEntry tr_ui[] = {
      "Quiz: data representation"},
     {"hw_quiz3_head", "Kvíz k zobrazování dat v počítači",
      "Quiz on data representation in computers"},
+    {"czech_sub", "Vyberte oblast a začněte procvičovat.",
+     "Pick an area and start practicing."},
+    {"Literatura", "Literatura", "Literature"},
+    {"Mluvnice", "Mluvnice", "Grammar"},
+    {"Maturitní četba", "Maturitní četba", "Maturita reading list"},
     {NULL, NULL, NULL}
 };
 

main.c

@@ -231,6 +231,7 @@ void activate(GtkApplication *app, gpointer user_data) {
     gtk_stack_add_named(main_stack, build_stats_page(), "stats");
     gtk_stack_add_named(main_stack, build_netmap_page(), "netmap");
     gtk_stack_add_named(main_stack, build_hwmap_page(), "hwmap");
+    gtk_stack_add_named(main_stack, build_czechmap_page(), "czechmap");
     gtk_stack_add_named(main_stack, build_hw_unit1_page(), "hwunit1");
     gtk_stack_add_named(main_stack, build_hw_unit1_exercise_page(), "hwex1");
     gtk_stack_add_named(main_stack, build_hw_unit2_page(), "hwunit2");

maturita.h

@@ -13,6 +13,7 @@
 #define NUM_SUBJECTS  13
 #define NET_SUBJ       1    /* index of "Správa počítačových sítí"     */
 #define HW_SUBJ        2    /* index of "Technické vybavení"          */
+#define CZ_SUBJ        3    /* index of "Český jazyk a literatura"    */
 #define CSS_FILE      "style.css"
 #define PROGRESS_DIR  "progress"
 #define PROGRESS_U1   "progress/unit1.conf"
@@ -786,8 +787,10 @@ void mark_hw_done(int lesson_id);
 void refresh_hw_completion_ui(void);
 void progress_for_hw(ProgressSum *out);
 void hw_rail_theme_reset(void);
+void czech_rail_theme_reset(void);
 void hw_lessons_apply_lang(void);
 GtkWidget *build_hwmap_page(void);
+GtkWidget *build_czechmap_page(void);
 GtkWidget *build_hw_unit1_page(void);
 GtkWidget *build_hw_unit1_exercise_page(void);
 GtkWidget *build_hw_unit2_page(void);
@@ -796,6 +799,8 @@ GtkWidget *build_hw_unit3_page(void);
 GtkWidget *build_hw_unit3_exercise_page(void);
 void draw_chip_icon(GtkDrawingArea *area, cairo_t *cr,
                            int width, int height, gpointer data);
+void draw_czech_flag(GtkDrawingArea *area, cairo_t *cr,
+                            int width, int height, gpointer data);
 void net_lesson_notes_ensure(NetLesson *L);
 void net_rescale_lesson_notes(NetLesson *L, int body, int head, int kick);
 GtkWidget *make_back_button(const char *target);

stats.c

@@ -86,7 +86,7 @@ void refresh_stats_ui(void) {
         GtkWidget *bar = stats_ui.subj[s].bar;
         ProgressSum sp = {0};
         gboolean has_content = (s == NET_SUBJ) || (s == HW_SUBJ)
-                               || sub_unit_count[s] > 0;
+                               || (s == CZ_SUBJ) || sub_unit_count[s] > 0;
 
         if (!count || !bar)
             continue;
@@ -359,7 +359,7 @@ GtkWidget *build_stats_page(void) {
         GtkWidget *count;
         GtkWidget *bar;
         gboolean has_units = (s == NET_SUBJ) || (s == HW_SUBJ)
-                             || sub_unit_count[s] > 0;
+                             || (s == CZ_SUBJ) || sub_unit_count[s] > 0;
         gboolean has_deutsch_units = sub_unit_count[s] > 0;
 
         subject = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);

style.css

@@ -366,6 +366,11 @@ windowcontrols button:not(:hover) image {
    font-size: 12px;
    font-weight: 600;
 }
+.cz-label {
+   background-color: @bg_base;
+   padding: 1px 6px;
+   border-radius: 8px;
+}
 .ex-prompt {
    color: @fg_text;
    font-size: 16px;

subjects.c

@@ -5,11 +5,13 @@
 /* ------------------------------------------------------------------ */
 
 
-/* Index 0 (Deutsch), NET_SUBJ (networks) and HW_SUBJ (hardware) are unlocked. */
+/* Index 0 (Deutsch), NET_SUBJ (networks), HW_SUBJ (hardware) and CZ_SUBJ
+ * (Czech) are unlocked. */
 const char *sub_keys[NUM_SUBJECTS] = {
     "Deutsch",
     "Správa počítačových sítí",
     "Technické vybavení",
+    "Český jazyk a literatura",
     "Občanská nauka",
     "English",
     "Matematika",
@@ -17,7 +19,6 @@ const char *sub_keys[NUM_SUBJECTS] = {
     "Základy Přírodopisných věd",
     "Technická grafika",
     "Prezentační grafika",
-    "Český jazyk a literatura",
     "Programování",
     "Programové vybavení",
 };
@@ -245,6 +246,47 @@ void draw_german_flag(GtkDrawingArea *area, cairo_t *cr,
     cairo_restore(cr);
 }
 
+/* Czech flag (white / red with a blue triangle) drawn in a clipped circle. */
+void draw_czech_flag(GtkDrawingArea *area, cairo_t *cr,
+                            int width, int height, gpointer data) {
+    double cx = width / 2.0;
+    double cy = height / 2.0;
+    double r = MIN(width, height) / 2.0 - 2.0;
+
+    (void)area;
+    (void)data;
+
+    cairo_set_operator(cr, CAIRO_OPERATOR_CLEAR);
+    cairo_paint(cr);
+    cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
+
+    cairo_save(cr);
+    cairo_new_path(cr);
+    cairo_arc(cr, cx, cy, r, 0.0, 2.0 * G_PI);
+    cairo_clip(cr);
+
+    cairo_new_path(cr);
+    cairo_rectangle(cr, 0.0, 0.0, (double)width, (double)height);
+    cairo_set_source_rgb(cr, 0.98, 0.98, 0.98);
+    cairo_fill(cr);
+
+    cairo_new_path(cr);
+    cairo_rectangle(cr, 0.0, (double)height / 2.0,
+                    (double)width, (double)height / 2.0);
+    cairo_set_source_rgb(cr, 0.83, 0.16, 0.18);
+    cairo_fill(cr);
+
+    cairo_new_path(cr);
+    cairo_move_to(cr, 0.0, 0.0);
+    cairo_line_to(cr, (double)width * 0.55, (double)height / 2.0);
+    cairo_line_to(cr, 0.0, (double)height);
+    cairo_close_path(cr);
+    cairo_set_source_rgb(cr, 0.07, 0.24, 0.55);
+    cairo_fill(cr);
+
+    cairo_restore(cr);
+}
+
 GtkWidget *build_subjects_page(void) {
     GtkWidget *page;
     GtkWidget *scroll;
@@ -337,6 +379,17 @@ GtkWidget *build_subjects_page(void) {
             g_object_set_data_full(G_OBJECT(card), "target",
                                    g_strdup("hwmap"), g_free);
             g_signal_connect(card, "clicked", G_CALLBACK(on_nav_clicked), NULL);
+        } else if (i == CZ_SUBJ) {
+            GtkWidget *flag = gtk_drawing_area_new();
+            gtk_widget_add_css_class(card, "current");
+            gtk_widget_set_size_request(flag, (int)SUB_BUBBLE,
+                                        (int)SUB_BUBBLE);
+            gtk_drawing_area_set_draw_func(GTK_DRAWING_AREA(flag),
+                                           draw_czech_flag, NULL, NULL);
+            gtk_button_set_child(GTK_BUTTON(card), flag);
+            g_object_set_data_full(G_OBJECT(card), "target",
+                                   g_strdup("czechmap"), g_free);
+            g_signal_connect(card, "clicked", G_CALLBACK(on_nav_clicked), NULL);
         } else {
             GtkWidget *lock;
             gtk_widget_add_css_class(card, "locked");
@@ -356,7 +409,7 @@ GtkWidget *build_subjects_page(void) {
         gtk_label_set_justify(GTK_LABEL(lbl), GTK_JUSTIFY_CENTER);
         gtk_label_set_wrap(GTK_LABEL(lbl), TRUE);
         gtk_widget_add_css_class(lbl, "unit-name");
-        if (i != 0 && i != NET_SUBJ && i != HW_SUBJ)
+        if (i != 0 && i != NET_SUBJ && i != HW_SUBJ && i != CZ_SUBJ)
             gtk_widget_add_css_class(lbl, "unit-name-locked");
         sub_labels[i] = lbl;
         gtk_fixed_put(GTK_FIXED(fixed), lbl, 0, 0);

theme.c

@@ -414,4 +414,5 @@ void apply_theme(void) {
     }
     net_rail_theme_reset();
     hw_rail_theme_reset();
+    czech_rail_theme_reset();
 }