C++ Builder 利用 Hook 控制 Panel 实现自动工具栏或自动菜单，无需鼠标单击即可弹出菜单

功能描述：单鼠标移动到特定区域，自动弹出一个工具栏或者菜单，鼠标移动到工具栏上，选择相应的内容，若未作出选择，单鼠标离开新弹出的工具栏，该工具栏自动关闭，无需鼠标单击即能自动关闭，采用了Hook随时获取鼠标坐标，该方法如果热点离弹出位置较远的话，可以增加一个时钟延长二级工具栏的存在时间，以便鼠标滑入工具栏区域。

 

下载源代码

 

// 头文件

//---------------------------------------------------------------------------

#ifndef unitMainH
#define unitMainH
//---------------------------------------------------------------------------
#include <Classes.hpp>
#include <Controls.hpp>
#include <StdCtrls.hpp>
#include <Forms.hpp>
#include <Buttons.hpp>
#include <ExtCtrls.hpp>
#include <Menus.hpp>
//---------------------------------------------------------------------------
class TformMain : public TForm
{
__published: // IDE-managed Components
 TEdit *Edit1;
 TPanel *Panel1;
 TPanel *Panel2;
 TEdit *Edit2;
 TPanel *Panel3;
 TSpeedButton *SpeedButton1;
 TSpeedButton *SpeedButton2;
 TSpeedButton *SpeedButton3;
 TSpeedButton *SpeedButton4;
 TSpeedButton *SpeedButton5;
 TSpeedButton *SpeedButton6;
private: // User declarations
 int SpeedButton4X,SpeedButton4Y;
 int Panel2X,Panel2Y;
public:  // User declarations
 __fastcall TformMain(TComponent* Owner);
 __fastcall ~TformMain();
};
//---------------------------------------------------------------------------
extern PACKAGE TformMain *formMain;
//---------------------------------------------------------------------------
#endif

 

--------------------------------------------------------------------------------------------------------------------------------------------------

 // CPP 文件

//---------------------------------------------------------------------------

#include <vcl.h>
#include <psapi.h>
#include <SysUtils.hpp>
#pragma hdrstop

#include "unitMain.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TformMain *formMain;

//---------------------------------------------------------------------------
HHOOK hHook;
//---------------------------------------------------------------------------
LRESULT CALLBACK LowLevelMouseProc(int code, WPARAM wParam, LPARAM lParam);
//---------------------------------------------------------------------------
__fastcall  TformMain::TformMain(TComponent* Owner)
 : TForm(Owner)
{

// 创建 Hook
 hHook = SetWindowsHookEx(WH_MOUSE_LL, (HOOKPROC) LowLevelMouseProc, GetModuleHandle(NULL), 0);
// 隐藏需要弹出的菜单

 Panel2->Visible = false;
}
//---------------------------------------------------------------------------

__fastcall  TformMain::~TformMain()
{
 UnhookWindowsHookEx(hHook);
}
//---------------------------------------------------------------------------

LRESULT CALLBACK LowLevelMouseProc(int code, WPARAM wParam, LPARAM lParam)
{
 // Hook 得到实时鼠标位置

 // 创建一个坐标结构
 TPoint Point;
 // API 得到一个鼠标位置
 GetCursorPos(&Point);

 int x = Point.x;
 int y = Point.y;

 // 输出到 Edit (调试用)
 formMain->Edit1->Text = IntToStr(x) + ", " + IntToStr(y);

 {
  // 控制 Panel

  // Panel3 的绝对坐标
  TPoint pointPanel3;
  ClientToScreen((HWND)formMain->Panel3->Handle, &pointPanel3);
  // Panel2 的绝对坐标
  TPoint pointPanel2;
  ClientToScreen((HWND)formMain->Panel2->Handle, &pointPanel2);

  // 鼠标如果在 Panel3 区域内
  if(x >= pointPanel3.x && y >= pointPanel3.y
      && x <= pointPanel3.x + formMain->Panel3->Width && y <= pointPanel3.y + formMain->Panel3->Height)
  {
   // 显示 Panel2
   if (formMain->Panel2->Visible == false)
   {
    formMain->Panel2->Visible = true;
      }
  }
  // 鼠标如果处于 Panel2 范围内
  else if(x >= pointPanel2.x && y >= pointPanel2.y
      && x <= pointPanel2.x + formMain->Panel2->Width && y <= pointPanel2.y + formMain->Panel2->Height)
  {
   // 正在显示菜单
  }
  // 不在任何指定范围内
  else
  {
   // 关闭菜单
   if (formMain->Panel2->Visible == true)
   {
    formMain->Panel2->Visible = false;
      }
  }

  // 取得坐标
  int t1 = pointPanel2.x + formMain->Panel2->Width;
  int t2 = pointPanel2.y + formMain->Panel2->Height;
  // 坐标输出 (调试用)
  formMain->Edit2->Text = IntToStr(t1) + ", " + IntToStr(t2);

 }

 // 进行下一次捕获
 return CallNextHookEx(hHook, code, wParam, lParam);
}
//---------------------------------------------------------------------------

  

下载源代码