c++ - win32 api更新进度条为方法

Question

我有一个方法负责将 immes 从内存保存到硬盘驱动器，最后将返回一个布尔值。现在我创建了一个进度条。但我真的不知道如何将进度条连接到此方法，只要该方法保存进度并显示蓝条。这是我的代码：

switch(_formatIndex){                   
        case 0:

            save.saveImages(_MatVector,0, path);

            int pb_pos;pb_pos= SendMessage(_progressBar, PBM_GETPOS, 0, 0); 
            while(pb_pos<100){
                SendMessage(_progressBar, PBM_SETPOS, pb_pos, 0);
                pb_pos++;
            }
            break;
        case 1:
            save.saveImages(_MatVector,1, path);                                                
            break;
        }   

Answer 1

您需要知道保存了多少文件，然后在保存每个文件后递增进度条，而不是一次全部保存。例如：

SendMessage(_progressBar, PBM_SETRANGE32, 0, NumberOfFiles); 
SendMessage(_progressBar, PBM_SETSTEP, 1, 0); 
SendMessage(_progressBar, PBM_SETPOS, 0, 0); 

for (int i = 0; i < NumberOfFiles; ++i)
{
    ...
    save.saveImages(_MatVector, _formatIndex, path);
    SendMessage(_progressBar, PBM_STEPIT, 0, 0); 
    ...
}   

或者：

SendMessage(_progressBar, PBM_SETRANGE, 0, 100); 
SendMessage(_progressBar, PBM_SETPOS, 0, 0); 

for (int i = 0; i < NumberOfFiles; ++i)
{
    ...
    save.saveImages(_MatVector, _formatIndex, path);
    SendMessage(_progressBar, PBM_SETPOS, (i * 100) / NumberOfFiles, 0); 
    ...
}   

Answer 2

SendMessage(GetDlgItem(hAutoParent,IDC_PROGRESS1),PBM_SETRANGE,0, MAKELPARAM(0,10 ));
    SendMessage(GetDlgItem(hAutoParent,IDC_PROGRESS1),PBM_SETBARCOLOR,0,(LPARAM)colorResult3);
    SendMessage(GetDlgItem(hAutoParent,IDC_PROGRESS1),PBM_SETBKCOLOR,0,(LPARAM)colorResult2);
    SendMessage(GetDlgItem(hAutoParent,IDC_PROGRESS1),PBM_SETPOS,0,0);

int iProgressPosition=0;//Intially global variable

SendMessage(GetDlgItem(hAutoParent,IDC_PROGRESS1),PBM_SETPOS, iProgessPosition,0);
//incremented global varibale in loop is equal to 10(setrange 10)
iProgressPosition++;