画板（by 冰雪女神百亚）
2018-6-19 ~ 2023-3-8
(0)
这是一个画板程序。执行效果如下：
右边颜色即对应画笔颜色，滑动条可调节画笔大小。
如果画错了想擦除，选择对应背景色作为画笔颜色即可。
如果想保存你的画作，请点击“工具”二字。此时在与exe同目录下将会有名为“easyxImage.bmp”的文件。请及时拷走，以防下次保存时被覆盖。
全部代码如下：
///////////////////////////////////////////////
// 程序名称：画板
// 编译环境：Visual C++ 2017，EasyX_20180727(beta)
// 作者：冰雪女神百亚
// QQ：1169351944
// 邮箱：cloudea@163.com
// 最后修改：2019-1-18
//
#include<string>
#include<graphics.h>
using namespace std;
// 点
struct Point
{
int x;
int y;
Point() { x = -1; y = -1; }
Point(int x, int y)
{
this->x = x;
this->y = y;
}
bool operator==(const Point& p)
{
return x == p.x && y == p.y;
}
Point& operator=(const Point& p)
{
x = p.x; y = p.y;
return *this;
}
};
// 所有控件的父类
struct Tool
{
int left;
int top;
int width;
int height;
Tool() {}
Tool(int left, int top, int width, int height)
{
this->left = left;
this->top = top;
this->width = width;
this->height = height;
}
virtual double call(MOUSEMSG) = 0;
bool isIn(const Point& p)
{
if (p.x >= left && p.x <= left + width && p.y >= top && p.y <= top + height)
{
return true;
}
return false;
}
};
// 作为矩形用
struct Tool_Range :Tool
{
Tool_Range() {}
Tool_Range(int left, int top, int width, int height) :Tool(left, top, width, height) {}
double call(MOUSEMSG m)
{
return 0;
}
};
// 可画画的区域
struct Tablet :Tool
{
int size;
COLORREF color;
Tablet() {}
Tablet(int left, int top, int width, int height, int size, COLORREF color) :Tool(left, top, width, height)
{
this->size = size;
this->color = color;
isDown = false;
}
double call(MOUSEMSG m)
{
if (m.uMsg == WM_LBUTTONDOWN)
{
if (isIn(Point(m.x, m.y)))
{
isDown = true;
begPos = Point(m.x, m.y);
}
}
if (m.uMsg == WM_LBUTTONUP)
{
isDown = false;
}
if (m.uMsg == WM_MOUSEMOVE && isDown)
{
if (isIn(begPos) && isIn(Point(m.x, m.y))) // 在区域内
{
setlinestyle(PS_ENDCAP_ROUND, size);
setlinecolor(color);
HRGN rgn = CreateRectRgn(left, top, left + width, top + height);
setcliprgn(rgn);
DeleteObject(rgn);
line(begPos.x, begPos.y, m.x, m.y);
setcliprgn(NULL);
}
begPos = Point(m.x, m.y);
}
return 1;
}
private:
bool isDown;
Point begPos;
};
// 简单标签
struct Label :Tool
{
wstring s;
COLORREF color;
bool isCenteral;
Label() {}
Label(int left, int top, int width, int height, wstring s, COLORREF color, bool isCenteral = false) :Tool(left, top, width, height)
{
this->color = color;
this->s = s;
}
double call(MOUSEMSG m)
{
setfillcolor(0xefefef);
solidrectangle(left, top, left + width, top + height);
settextcolor(color);
setbkmode(TRANSPARENT);
settextstyle(24, 15, L"Courier");
RECT rect = { left, top, left + width, top + height };
if (isCenteral)
drawtext(s.c_str(), &rect, DT_CENTER | DT_TOP | DT_WORDBREAK);
else
drawtext(s.c_str(), &rect, DT_LEFT | DT_TOP | DT_WORDBREAK);
return 1;
}
bool isClick(MOUSEMSG m)
{
if (m.uMsg == WM_LBUTTONUP)
{
if (isIn(Point(m.x, m.y)))
{
return true;
}
}
return false;
}
};
// 圆形按钮
struct Circle :Tool
{
COLORREF color;
COLORREF color_over;
bool isClick;
Circle()
{
isClick = false;
}
Circle(int left, int top, int width, int height, COLORREF color, COLORREF color_over) :Tool(left, top, width, height)
{
this->color = color;
this->color_over = color_over;
isClick = false;
}
double call(MOUSEMSG m) { return 1; }
bool call(MOUSEMSG m, Tablet& tab)
{
if (m.uMsg == WM_LBUTTONDOWN)
{
if (isIn(Point(m.x, m.y)))
{
isClick = true;
tab.color = color;
}
}
if (m.uMsg == WM_LBUTTONUP)
{
if (isIn(Point(m.x, m.y)))
{
isClick = true;
}
}
if (m.uMsg == WM_MOUSEMOVE)
{
if (isIn(Point(m.x, m.y)))
{
isOver = true;
}
else
{
isOver = false;
}
}
setfillcolor(color); // always have a color
if (isOver) setfillcolor(color_over);
setlinecolor(0xffffff);
if (isClick)
{
setlinestyle(PS_ENDCAP_ROUND, 3);
}
else
{
setlinestyle(PS_ENDCAP_ROUND, 0);
}
fillellipse(left, top, left + width, top + height);
return isClick;
}
private:
bool isOver;
};
//滑动条
struct Slider :Tool
{
double percent;
int radius;
COLORREF bkcolor;
COLORREF fkcolor;
Slider() { }
Slider(int left, int top, int width, int height, double percent = 0, int radius = 0, COLORREF bkcolor = 0x000000, COLORREF fkcolor = 0xffffff) :Tool(left, top, width, height)
{
this->percent = percent;
this->radius = radius;
this->bkcolor = bkcolor;
this->fkcolor = fkcolor;
setRange();
}
double call(MOUSEMSG m)
{
if (m.uMsg == WM_LBUTTONDOWN)
{
if (m.x >= left - radius && m.x <= left + width + radius && m.y >= top && m.y <= top + height)
{
isDrag = true;
deltaY = range.top - m.y;
}
}
if (m.uMsg == WM_LBUTTONUP)
{
isDrag = false;
}
if (m.uMsg == WM_MOUSEMOVE && isDrag)
{
int t = deltaY + m.y;
if (t < top)
{
percent = 0;
}
else if (t > top + height - radius)
{
percent = 1;
}
else
{
percent = (t - top) / (double)(height - radius);
}
}
setRange();
setfillcolor(0xefefef);
solidrectangle(left - radius, top - (radius / 2 + 2), left + width + radius, top + height + (radius / 2 + 2));
setfillcolor(bkcolor);
solidroundrect(left, top, left + width, top + height, 3, 3);
setfillcolor(fkcolor);
solidellipse(range.left, range.top, range.left + radius, range.top + radius);
return percent;
}
private:
bool isDrag = false;
int deltaY = 0;
Tool_Range range;
void setRange()
{
double t = radius / 2.0;
double y = height - radius;
y *= percent;
y = top + t + y;
double x = left + width / 2.0;
range.left = (int)(x - t);
range.top = (int)(y - t);
range.width = radius;
range.height = radius;
}
};
int main()
{
const Point defaultWH(1100, 768); // 默认宽高
initgraph(defaultWH.x, defaultWH.y); // 初始化
BeginBatchDraw();
setfillcolor(0xffffff);
fillrectangle(0, 0, defaultWH.x, defaultWH.y); // 默认画图板背景
setfillcolor(0xefefef);
fillrectangle(defaultWH.x - 100, 0, defaultWH.x, defaultWH.y); // 默认工具栏背景
// 定义控件及其样式
Tablet mainTablet(0, 0, defaultWH.x - 100, defaultWH.y, 5, 0x000000);
Label label1(defaultWH.x - 100 + 27, 15, 48, 24, L"工具", 0x666666);
Label label2(defaultWH.x - 100 + 22, 740, 60, 20, L"1", 0x666666, true);
Slider slider1(defaultWH.x - 100 + 48, 600, 5, 120, 0, 26, 0xc3c3c3, 0x666666);
Circle Circles[9];
for (int i = 0; i < 9; i++)
{
Circles[i].left = defaultWH.x - 100 + 26;
Circles[i].top = 50 + i * 60;
Circles[i].width = 50;
Circles[i].height = 50;
}
Circles[0].color = 0x000000; Circles[0].color_over = 0x2e2e2e; Circles[0].isClick = true;
Circles[1].color = 0xffffff; Circles[1].color_over = 0xfafafa;
Circles[2].color = 0x1f1ae6; Circles[2].color_over = 0x332fe6;
Circles[3].color = 0x7018ed; Circles[3].color_over = 0x863eed;
Circles[4].color = 0xed3eeb; Circles[4].color_over = 0xed76ec;
Circles[5].color = 0xad2f09; Circles[5].color_over = 0xad5c43;
Circles[6].color = 0xcfd12f; Circles[6].color_over = 0xd0d15d;
Circles[7].color = 0x11f41c; Circles[7].color_over = 0x4ef456;
Circles[8].color = 0x0c98d2; Circles[8].color_over = 0x4dabd2;
while (true)
{
while (MouseHit())
{
MOUSEMSG m = GetMouseMsg();
//控件之间的交互关系
mainTablet.call(m);
double percent = slider1.call(m);
int progress = (int)(1 + percent * percent * 299);
mainTablet.size = progress;
wchar_t protext[4];
_itow_s(progress, protext, 10);
label2.s = protext;
int whichCircle = -1, whichCircleChoosed = -1;
for (int i = 0; i < 9; i++) // find last
{
if (Circles[i].isClick) whichCircleChoosed = i;
}
for (int i = 0; i < 9; i++) // find last + new
{
if (Circles[i].call(m, mainTablet) && whichCircleChoosed != i)
whichCircle = i;
}
if (whichCircle != -1)
{
Circles[whichCircle].isClick = true;
Circles[whichCircleChoosed].isClick = false;
}
if (label1.isClick(m))
{
saveimage(L"easyxImage.bmp");
}
}
label1.call(MOUSEMSG());
label2.call(MOUSEMSG());
FlushBatchDraw();
Sleep(50);
}
system("pause");
EndBatchDraw();
closegraph();
}
作者：冰雪女神百亚
QQ：1169351944
邮箱：cloudea@163.com
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