From a90e218c7114e85d28ab53cb33327904fe8f40e9 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Sat, 13 Apr 2019 03:08:16 +0200
Subject: Minesweeper: Start working on a simple minesweeper game. :^)

---
 Games/Minesweeper/Field.cpp | 176 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 176 insertions(+)
 create mode 100644 Games/Minesweeper/Field.cpp

(limited to 'Games/Minesweeper/Field.cpp')

diff --git a/Games/Minesweeper/Field.cpp b/Games/Minesweeper/Field.cpp
new file mode 100644
index 0000000000..af14e09f27
--- /dev/null
+++ b/Games/Minesweeper/Field.cpp
@@ -0,0 +1,176 @@
+#include "Field.h"
+#include <LibGUI/GButton.h>
+#include <LibGUI/GLabel.h>
+#include <AK/HashTable.h>
+#include <unistd.h>
+#include <time.h>
+
+class SquareButton final : public GButton {
+public:
+    SquareButton(GWidget* parent)
+        : GButton(parent)
+    {
+    }
+
+    Function<void()> on_right_click;
+
+    virtual void mousedown_event(GMouseEvent& event) override
+    {
+        if (event.button() == GMouseButton::Right) {
+            if (on_right_click)
+                on_right_click();
+        }
+        GButton::mousedown_event(event);
+    }
+};
+
+Field::Field(GWidget* parent)
+    : GWidget(parent)
+{
+    m_mine_bitmap = GraphicsBitmap::load_from_file("/res/icons/minesweeper/mine.png");
+    m_flag_bitmap = GraphicsBitmap::load_from_file("/res/icons/minesweeper/flag.png");
+    m_one_bitmap = GraphicsBitmap::load_from_file("/res/icons/minesweeper/1.png");
+    m_two_bitmap = GraphicsBitmap::load_from_file("/res/icons/minesweeper/2.png");
+    m_three_bitmap = GraphicsBitmap::load_from_file("/res/icons/minesweeper/3.png");
+    m_four_bitmap = GraphicsBitmap::load_from_file("/res/icons/minesweeper/4.png");
+
+    set_fill_with_background_color(true);
+    set_background_color(Color::LightGray);
+    reset();
+}
+
+Field::~Field()
+{
+}
+
+template<typename Callback>
+void Field::for_each_neighbor_of(const Square& square, Callback callback)
+{
+    int r = square.row;
+    int c = square.column;
+    if (r > 0) // Up
+        callback(this->square(r - 1, c));
+    if (c > 0) // Left
+        callback(this->square(r, c - 1));
+    if (r < (m_rows - 2)) // Down
+        callback(this->square(r + 1, c));
+    if (c < (m_columns - 2)) // Right
+        callback(this->square(r, c + 1));
+}
+
+void Field::reset()
+{
+    set_greedy_for_hits(false);
+    srand(time(nullptr));
+    m_squares.resize(rows() * columns());
+
+    HashTable<int> mines;
+    for (int i = 0; i < m_mine_count; ++i)
+        mines.set(rand() % (rows() * columns()));
+
+    int i = 0;
+    for (int r = 0; r < rows(); ++r) {
+        for (int c = 0; c < columns(); ++c) {
+            Rect rect = { c * square_size(), r * square_size(), square_size(), square_size() };
+            auto& square = this->square(r, c);
+            square.row = r;
+            square.column = c;
+            square.has_mine = mines.contains(i);
+            square.has_flag = false;
+            square.is_swept = false;
+            if (!square.label)
+                square.label = new GLabel(this);
+            square.label->set_relative_rect(rect);
+            square.label->set_visible(false);
+            square.label->set_icon(square.has_mine ? m_mine_bitmap : nullptr);
+            square.label->set_background_color(Color::from_rgb(0xff4040));
+            if (!square.button)
+                square.button = new SquareButton(this);
+            square.button->set_relative_rect(rect);
+            square.button->set_visible(true);
+            square.button->on_click = [this, &square] (GButton&) {
+                on_square_clicked(square);
+            };
+            square.button->on_right_click = [this, &square] {
+                on_square_right_clicked(square);
+            };
+            ++i;
+        }
+    }
+    for (int r = 0; r < rows(); ++r) {
+        for (int c = 0; c < columns(); ++c) {
+            auto& square = this->square(r, c);
+            int number = 0;
+            for_each_neighbor_of(square, [&number] (auto& neighbor) {
+                number += neighbor.has_mine;
+            });
+            square.number = number;
+            if (square.has_mine)
+                continue;
+            switch (number) {
+            case 1:
+                square.label->set_icon(m_one_bitmap.copy_ref());
+                break;
+            case 2:
+                square.label->set_icon(m_two_bitmap.copy_ref());
+                break;
+            case 3:
+                square.label->set_icon(m_three_bitmap.copy_ref());
+                break;
+            case 4:
+                square.label->set_icon(m_four_bitmap.copy_ref());
+                break;
+            }
+        }
+    }
+}
+
+void Field::flood_fill(Square& square)
+{
+    on_square_clicked(square);
+    for_each_neighbor_of(square, [this] (auto& neighbor) {
+        if (!neighbor.is_swept && !neighbor.has_mine && neighbor.number == 0)
+            flood_fill(neighbor);
+    });
+}
+
+void Field::on_square_clicked(Square& square)
+{
+    if (square.is_swept)
+        return;
+    if (square.has_flag)
+        return;
+    square.is_swept = true;
+    square.button->set_visible(false);
+    square.label->set_visible(true);
+    if (square.has_mine) {
+        square.label->set_fill_with_background_color(true);
+        game_over();
+    } else if (square.number == 0) {
+        flood_fill(square);
+    }
+}
+
+void Field::on_square_right_clicked(Square& square)
+{
+    if (square.is_swept)
+        return;
+    square.has_flag = !square.has_flag;
+    square.button->set_icon(square.has_flag ? m_flag_bitmap : nullptr);
+    square.button->update();
+}
+
+void Field::game_over()
+{
+    set_greedy_for_hits(true);
+    for (int r = 0; r < rows(); ++r) {
+        for (int c = 0; c < columns(); ++c) {
+            auto& square = this->square(r, c);
+            if (square.has_mine) {
+                square.button->set_visible(false);
+                square.label->set_visible(true);
+            }
+        }
+    }
+    update();
+}
-- 
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