Windows程序设计（七）--鼠标
内容导读
互联网集市收集整理的这篇技术教程文章主要介绍了Windows程序设计（七）--鼠标，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含10435字，纯文字阅读大概需要15分钟。
内容图文
7.2 客户区鼠标消息
当鼠标移过窗口的显示区域时，窗口消息处理程序收到WM_MOUSEMOVE消息。当在窗口的显示区域中按下或者释放一个鼠标按键时，窗口消息处理程序会接收到下面这些消息：
|
键 |
按下 |
释放 |
按下(双键) |
|
左 |
WM_LBUTTONDOWN |
WM_LBUTTONUP |
WM_LBUTTONDBLCLK |
|
中 |
WM_MBUTTONDOWN |
WM_MBUTTONUP |
WM_MBUTTONDBLCLK |
|
右 |
WM_RBUTTONDOWN |
WM_RBUTTONUP |
WM_RBUTTONDBLCLK |
要接受到双键消息，需要在wndclass.style处增加CS_DBLCLKS
在WM_MOUSEMOVE中，可以用LOWORD和HIWORD宏来提取鼠标的位置：
x = LOWORD (lParam) ; y = HIWORD (lParam) ;
wParam中包含信息。MK前缀代表「鼠标按键」。
|
MK_LBUTTON |
按下左键 |
|
MK_MBUTTON |
按下中键 |
|
MK_RBUTTON |
按下右键 |
|
MK_SHIFT |
按下Shift键 |
|
MK_CONTROL |
按下Ctrl键 |
当您把鼠标移过窗口的显示区域时，Windows并不为鼠标的每个可能的图素位置都产生一个WM_MOUSEMOVE消息。您的程序接收到WM_MOUSEMOVE消息的次数，依赖于鼠标硬件，以及您的窗口消息处理程序在处理鼠标移动消息时的速度。
- 窗口消息处理程序可以「拦截鼠标」并且连续地接收鼠标消息，即使此时鼠标在该窗口显示区域之外。您将在本章的后面学习如何拦截鼠标。
- 如果正在显示一个系统模态消息框或者系统模态对话框，那么其它程序就不能接收鼠标消息。当系统模态消息框或者对话框活动时，禁止切换到其它窗口或者程序。一个显示系统模态消息框的例子，是当您关闭Windows时。
实例
#include<windows.h>
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT("Mouse Move");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
wndclass.hInstance = hInstance;
wndclass.lpfnWndProc = WndProc;
wndclass.lpszClassName = szAppName;
wndclass.style = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.lpszMenuName = 0;
if (!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("错误, 无法注册窗口类."), TEXT("错误"), MB_OK);
return 0;
}
hwnd = CreateWindow(szAppName, TEXT("Mouse Move"),
WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL);
ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd);
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static POINT pt[1000];
HDC hdc;
static int iCount;
PAINTSTRUCT ps;
int i, j;
switch (message) {
case WM_LBUTTONDOWN:
iCount = 0;
InvalidateRect(hwnd, NULL, TRUE);//重画时擦除背景
return 0;
case WM_MOUSEMOVE:
if (wParam && MK_LBUTTON && iCount < 1000) {
pt[iCount].x = LOWORD(lParam);
pt[iCount++].y = HIWORD(lParam);
hdc = GetDC(hwnd);
SetPixel(hdc, LOWORD(lParam), HIWORD(lParam), 0);
ReleaseDC(hwnd, hdc);
}
return 0;
case WM_LBUTTONUP:
InvalidateRect(hwnd, NULL, FALSE);//重画时不擦除背景
return 0;
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
SetCursor(LoadCursor(NULL, IDC_WAIT));
ShowCursor(TRUE);//显示鼠标
for (i = 0; i < iCount - 1; ++i) {
for (j = i + 1; j < iCount; ++j) {
MoveToEx(hdc, pt[i].x, pt[i].y, NULL);
LineTo(hdc, pt[j].x, pt[j].y);
}
}
SetCursor(LoadCursor(NULL, IDC_ARROW));
ShowCursor(FALSE);//隐藏鼠标
EndPaint(hwnd, &ps);
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
7.2.2 处理shift
组合键测试
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message) {
case WM_MOUSEMOVE:
if (wParam & MK_CONTROL) {
if (wParam & MK_SHIFT) {
MessageBox(hwnd, TEXT("按下Ctrl+Shift键"), TEXT("test！"), NULL);
return 0;
}
}
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
7.2.3 鼠标双击
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message) {
case WM_LBUTTONDBLCLK:
MessageBox(hwnd, TEXT("左键双击"), TEXT("test！"), NULL);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
客户区鼠标消息简单应用
#include<windows.h>
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT("Mouse Move");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
wndclass.hInstance = hInstance;
wndclass.lpfnWndProc = WndProc;
wndclass.lpszClassName = szAppName;
wndclass.style = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.lpszMenuName = 0;
if (!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("错误, 无法注册窗口类."), TEXT("错误"), MB_OK);
return 0;
}
hwnd = CreateWindow(szAppName, TEXT("Mouse Move"),
WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT,
600, 600,
NULL, NULL, hInstance, NULL);
ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd);
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static int cxClient, cyClient;
static POINT point;
HDC hdc;
PAINTSTRUCT ps;
TCHAR szBuffer[100];
switch (message) {
case WM_SIZE:
cxClient = LOWORD(lParam);
cyClient = HIWORD(lParam);
return 0;
case WM_MOUSEMOVE:
GetCursorPos(&point);
InvalidateRect(hwnd, NULL, TRUE);
return 0;
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
TextOut(hdc, cxClient / 2 - 30, cyClient / 2 - 30, szBuffer, wsprintf(szBuffer, TEXT("屏幕坐标(%d, %d)"), point.x, point.y));
ScreenToClient(hwnd, &point);
TextOut(hdc, cxClient / 2 - 30, cyClient / 2 , szBuffer, wsprintf(szBuffer, TEXT("客户区坐标(%d, %d)"), point.x, point.y));
EndPaint(hwnd, &ps);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
7.3 非客户区鼠标消息
|
键 |
按下 |
释放 |
按下（双击） |
|
左 |
WM_NCLBUTTONDOWN |
WM_NCLBUTTONUP |
WM_NCLBUTTONDBLCLK |
|
中 |
WM_NCMBUTTONDOWN |
WM_NCMBUTTONUP |
WM_NCMBUTTONDBLCLK |
|
右 |
WM_NCRBUTTONDOWN |
WM_NCRBUTTONUP |
WM_NCRBUTTONDBLCLK |
可以用两个Windows函数将屏幕坐标转换为显示区域坐标或者反之：
ScreenToClient (hwnd, &pt) ; ClientToScreen (hwnd, &pt) ;
7.3.1 击中测试消息
WM_NCHITTEST，它代表「非显示区域命中测试」。此消息优先于所有其它的显示区域和非显示区域鼠标消息。lParam参数含有鼠标位置的x和y屏幕坐标，wParam 参数另有用途。
Windows应用程序通常把这个消息传送给DefWindowProc，然后Windows用WM_NCHITTEST消息产生与鼠标位置相关的所有其它鼠标消息。对于非显示区域鼠标消息，在处理WM_NCHITTEST时，从DefWindowProc传回的值将成为鼠标消息中的wParam参数，这个值可以是任意非显示区域鼠标消息的wParam值再加上以下内容：
|
HTCLIENT HTNOWHERE HTTRANSPARENT HTERROR |
显示区域 不在窗口中 窗口由另一个窗口覆盖 使DefWindowProc产生警示用的哔声 |
如果DefWindowProc在其处理WM_NCHITTEST消息后传回HTCLIENT，那么Windows将把屏幕坐标转换为显示区域坐标并产生显示区域鼠标消息。
#define HTERROR (-2) //在屏幕的后面或在窗体之间的线上(使函数DefWindowProc产生一个警示音) #define HTTRANSPARENT (-1) //在一个被其它窗口覆盖的窗口中 #define HTNOWHERE 0 //在屏幕背景或窗口之间的分界线 #define HTCLIENT 1 //在客户区中 #define HTCAPTION 2 //在标题栏中 #define HTSYSMENU 3 //在一个窗口菜单栏或子窗口的关闭按钮上 #define HTGROWBOX 4 //在尺寸框中 #define HTSIZE HTGROWBOX //同HTGROWBOX #define HTMENU 5 //在菜单区域 #define HTHSCROLL 6 //在水平滚动条上 #define HTVSCROLL 7 //在垂直滚动条上 #define HTMINBUTTON 8 //在最小化按钮上 #define HTMAXBUTTON 9 //在最大化按钮上 #define HTLEFT 10 //在窗口的左边框上 #define HTRIGHT 11 //在窗口的右边框上 #define HTTOP 12 //在窗口水平边框的上方 #define HTTOPLEFT 13 //在窗口边框的左上角 #define HTTOPRIGHT 14 //在窗口边框的右上角 #define HTBOTTOM 15 //在窗口的水平边框的底部 #define HTBOTTOMLEFT 16 //在窗口边框的左下角 #define HTBOTTOMRIGHT 17 //在窗口边框的右下角 #define HTBORDER 18 //在不具有可变大小边框的窗口的边框上 #define HTREDUCE HTMINBUTTON //同HTMINBUTTON #define HTZOOM HTMAXBUTTON //同HTMAXBUTTON #define HTSIZEFIRST HTLEFT //同HTLEFT #define HTSIZELAST HTBOTTOMRIGHT //同HTBOTTOMRIGHT #define HTOBJECT 19 //忽略该标识符, 已废弃 #define HTCLOSE 20 //在关闭按钮上 #define HTHELP 21 //在帮助按钮上
#include<windows.h>
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT("Mouse Move");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
wndclass.hInstance = hInstance;
wndclass.lpfnWndProc = WndProc;
wndclass.lpszClassName = szAppName;
wndclass.style = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.lpszMenuName = 0;
if (!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("错误, 无法注册窗口类."), TEXT("错误"), MB_OK);
return 0;
}
hwnd = CreateWindow(szAppName, TEXT("Mouse Move"),
WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT,
600, 600,
NULL, NULL, hInstance, NULL);
ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd);
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
TCHAR szBuffer[100];
static POINT pt;
switch (message) {
case WM_NCLBUTTONDOWN:
pt.x = LOWORD(lParam);
pt.y = HIWORD(lParam);
ScreenToClient(hwnd, &pt);
switch (wParam) {
case HTCAPTION:
wsprintf(szBuffer, TEXT("击中标题栏，客户区坐标(%d, %d)"), pt.x, pt.y);
MessageBox(hwnd, szBuffer, TEXT("test"), NULL);
break;
case HTMINBUTTON:
wsprintf(szBuffer, TEXT("击中最小化，客户区坐标(%d, %d)"), pt.x, pt.y);
MessageBox(hwnd, szBuffer, TEXT("test"), NULL);
break;
case HTMAXBUTTON:
wsprintf(szBuffer, TEXT("击中最大化，客户区坐标(%d, %d)"), pt.x, pt.y);
MessageBox(hwnd, szBuffer, TEXT("test"), NULL);
break;
}
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
内容总结
以上是互联网集市为您收集整理的Windows程序设计（七）--鼠标全部内容，希望文章能够帮你解决Windows程序设计（七）--鼠标所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错，欢迎将互联网集市网站推荐给程序员好友。
内容备注
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 gblab@vip.qq.com 举报，一经查实，本站将立刻删除。
内容手机端
扫描二维码推送至手机访问。
来源：【匿名】