Basic Trigger with path drawing

knight's-tour-problem/Knight_draw.h

@@ -0,0 +1,181 @@
+#pragma once
+
+#include <easyx.h>
+#include <graphics.h>
+#include <windows.h>
+#include <iostream>
+#include <cstdio>
+#include <conio.h>
+//#include "Knight_algorithm.h"
+#define BACKGROUND RGB(15, 56, 115)
+#define BOARD_UNIT 60
+#define BOARD_SIZE 8
+#define PAD 1
+#define BOTTOM 3
+#define MSG_X 60
+#define MSG_Y 570
+#define MSG_HEIGHT 40
+#define BUF_SIZE 50
+
+// Function declarations
+void PrintFirst();
+void PrintOnce();
+void EndPrint();
+bool OnBoard(int x, int y);
+bool OnSetButton(int x, int y);
+void HighLight();
+void PrintClickPosition(std::pair<int, int> node);
+void Onclick();
+void SetRun(std::pair<int, int> node);
+
+// record the tour of the Knight by tuple (row, col)
+//extern int tour[BOARD_SIZE_SQUARE][2];  
+//extern int SetX, SetY;
+int offset = BOARD_UNIT * PAD;
+struct SetButtonPos {
+	int x = 440;
+	int y = 570;
+	int xx = 520;
+	int yy = 620;
+}SetButton;
+struct ButtonMsgPos {
+	int x = 450;
+	int y = 575;
+	int h = 40;
+}ButtonMsg;
+
+// Print out the chessboard first time
+void PrintFirst()
+{
+	// Set the window size
+	initgraph((BOARD_SIZE + PAD * 2) * BOARD_UNIT, (BOARD_SIZE + PAD * 2 + BOTTOM) * BOARD_UNIT);
+	// Set the background color
+	setbkcolor(BACKGROUND);
+	// Clear the screen
+	cleardevice();
+}
+
+// Print out the chessboard once
+void PrintOnce()
+{
+	// draw chessboard's background
+	cleardevice();
+	for (int i = 1; i <= BOARD_SIZE; ++i) {
+		for (int j = 1; j <= BOARD_SIZE; ++j) {
+			if ((i + j) % 2) {
+				setfillcolor(BLACK);
+			}
+			else {
+				setfillcolor(WHITE);
+			}
+			solidrectangle((j - 1) * BOARD_UNIT + offset, (i - 1) * BOARD_UNIT + offset,
+				j * BOARD_UNIT + offset, i * BOARD_UNIT + offset);
+		}
+	}
+}
+
+// The end of the print
+void EndPrint()
+{
+	// Pause the screen
+	// _getch();
+	// Close the window
+	closegraph();
+}
+
+// Check if the mouse is on the board
+bool OnBoard(int x, int y)
+{
+	if (x >= offset && x <= offset + BOARD_UNIT * BOARD_SIZE &&
+		y >= offset && y <= offset + BOARD_UNIT * BOARD_SIZE) {
+		return true;
+	}
+	return false;
+}
+
+bool OnSetButton(int x, int y)
+{
+	if (x >= SetButton.x && x <= SetButton.xx &&
+		y >= SetButton.y && y <= SetButton.yy) {
+		return true;
+	}
+}
+
+// HighLight the unit if mouse moves on it
+void HighLight()
+{
+	std::cout << "HighLight" << std::endl;
+	ExMessage msg;
+	bool isClick = false;
+	std::pair<int, int> node;
+	while (1) {
+		if (peekmessage(&msg, EM_MOUSE)) {
+			int x = msg.x;
+			int y = msg.y;
+			BeginBatchDraw();
+			PrintOnce();
+			if (msg.message == WM_LBUTTONDOWN) {
+				node = std::make_pair(x, y);
+				if (OnBoard(x, y)) PrintClickPosition(node);
+				else if (OnSetButton(x, y)) SetRun(node);  // Set and Run
+				isClick = true;
+			}
+			if (!OnBoard(x, y)) continue;
+			if (isClick) PrintClickPosition(node);
+			int ii = (y - BOARD_UNIT * PAD) / BOARD_UNIT + 1;
+			int jj = (x - BOARD_UNIT * PAD) / BOARD_UNIT + 1;
+			std::cout << "HighLighting " << ii << " " << jj << std::endl;
+			int offset = BOARD_UNIT * PAD;
+			// Print out Special color
+			setfillcolor(RED);
+			solidrectangle((jj - 1) * BOARD_UNIT + offset, (ii - 1) * BOARD_UNIT + offset,
+				jj * BOARD_UNIT + offset, ii * BOARD_UNIT + offset);
+			FlushBatchDraw();
+		}
+	}
+}
+
+// PrintOut the Clicked position
+void PrintClickPosition(std::pair<int, int> node)
+{
+	std::cout << "Printing POS..." << std::endl;
+	std::pair<int, int> OutPos;
+	char OutPositionMsg[BUF_SIZE];
+	OutPos.first = (node.first - BOARD_UNIT * PAD) / BOARD_UNIT + 1;
+	OutPos.second = (node.second - BOARD_UNIT * PAD) / BOARD_UNIT + 1;
+	sprintf_s(OutPositionMsg, "Begin Position ( %d , %d )", OutPos.second, OutPos.first);
+	settextstyle(MSG_HEIGHT, 0, "Cambria");
+	settextcolor(WHITE);
+	outtextxy(MSG_X, MSG_Y, OutPositionMsg);
+	// Out Button
+	setfillcolor(RED);
+	rectangle(SetButton.x, SetButton.y, SetButton.xx, SetButton.yy);
+	settextstyle(ButtonMsg.h, 0, "Impact");
+	settextcolor(RED);
+	outtextxy(ButtonMsg.x, ButtonMsg.y, "Start");
+	FlushBatchDraw();
+}
+
+// Actions On Clicking any unit
+void Onclick()
+{
+	HighLight();
+}
+
+// Set the Program Run
+void SetRun(std::pair<int, int> node)
+{
+	//SetX = node.first;
+	//SetY = node.second;
+	PrintOnce();
+	_getch();
+}
+
+/* int main()
+{
+	PrintFirst();
+	Onclick();
+	EndPrint();
+	_getch();
+	return 0;
+}*/