崩溃的节目图像的长宽比 [英] aspect ratio of image crashing the program

问题描述

这里是code此code是当控制去诠释WindowRatio = WidthOf previewPane / HeightOf previewPane保持崩溃图像的长宽比;
 谁能给想法，为什么？

  INT WidthOf previewPane = RECTWIDTH（m_rcParent）;
INT HeightOf previewPane = RECTHEIGHT（m_rcParent）;INT ImageRatio = WidthOfImage / HeightOfImage;
INT WindowRatio = WidthOf previewPane / HeightOf previewPane;如果（WindowRatio＆GT; ImageRatio和放大器;＆安培; WidthOf previewPane＆LT; WidthOfImage）
{
    m_iFinalHeight = HeightOf previewPane;
    m_iFinalWidth = m_iFinalHeight * ImageRatio;
    的MessageBox（NULL，L1，长度错误，
            MB_ICONERROR | MB_OK）;
}
否则，如果（WindowRatio＆LT; ImageRatio＆放大器;＆安培; WidthOf previewPane＆LT; WidthOfImage）
{
    m_iFinalWidth = WidthOf previewPane;
    m_iFinalHeight = m_iFinalWidth / ImageRatio;
        的MessageBox（NULL，L2，L错误，
            MB_ICONERROR | MB_OK）;
}
否则，如果（WindowRatio＆GT; ImageRatio和放大器;＆安培; WidthOf previewPane＆GT; WidthOfImage）
{
    m_iFinalHeight = HeightOfImage;
    m_iFinalWidth = WidthOfImage;
        的MessageBox（NULL，L3，长度错误，
            MB_ICONERROR | MB_OK）;}
否则，如果（WindowRatio＆LT; ImageRatio＆放大器;＆安培; WidthOf previewPane＆GT; WidthOfImage）
{
    m_iFinalHeight = HeightOfImage;
    m_iFinalWidth = WidthOfImage;
        的MessageBox（NULL，L4，L错误，
            MB_ICONERROR | MB_OK）;}
 

解决方案

该算法中的逻辑是正确的我终于发现，WidthOf previewPane和HeightOf previewPane = 0的，因为在我所编写的功能这code，最后被初始化，因此这2个没有初始化的时候，我调试他们，我通过把它们放在一个if条件，这将让控制里面去，如果他们的值不为0回避THID问题和它的工作好听。
看到这 -

 如果（WidthOf previewPane = 0＆安培;！＆安培;！HeightOf previewPane = 0）
            {
                  这里的条件......            }
 

和多数民众解决。

here is the code this code is to maintain the aspect ratio of the image it crashes when the control goes to int WindowRatio = WidthOfPreviewPane / HeightOfPreviewPane; can anyone give idea why ??

int WidthOfPreviewPane = RECTWIDTH(m_rcParent); 
int HeightOfPreviewPane = RECTHEIGHT(m_rcParent) ; 

int ImageRatio = WidthOfImage / HeightOfImage;
int WindowRatio = WidthOfPreviewPane / HeightOfPreviewPane;

if (WindowRatio > ImageRatio && WidthOfPreviewPane< WidthOfImage)
{
    m_iFinalHeight = HeightOfPreviewPane;
    m_iFinalWidth = m_iFinalHeight * ImageRatio;
    MessageBox(NULL, L"1",L"Error", 
            MB_ICONERROR | MB_OK);
}
else if (WindowRatio < ImageRatio && WidthOfPreviewPane< WidthOfImage)
{
    m_iFinalWidth = WidthOfPreviewPane;
    m_iFinalHeight = m_iFinalWidth / ImageRatio;
        MessageBox(NULL, L"2",L"Error", 
            MB_ICONERROR | MB_OK);
}
else if(WindowRatio > ImageRatio && WidthOfPreviewPane> WidthOfImage)
{
    m_iFinalHeight = HeightOfImage;
    m_iFinalWidth = WidthOfImage;
        MessageBox(NULL, L"3",L"Error", 
            MB_ICONERROR | MB_OK);

}
else if(WindowRatio < ImageRatio && WidthOfPreviewPane> WidthOfImage)
{
    m_iFinalHeight = HeightOfImage;
    m_iFinalWidth = WidthOfImage;
        MessageBox(NULL, L"4",L"Error", 
            MB_ICONERROR | MB_OK);

}

解决方案

the logic of this algo is correct finally i found that WidthOfPreviewPane and HeightOfPreviewPane=0 its because the function in which i have written this code was initialized at last so these 2 were not initialized that time when i debugged them and i avoided thid problem by putting them in in a if condition which will let the control go inside if their value is not 0 and it worked nicely. see this-

 if(WidthOfPreviewPane!= 0 && HeightOfPreviewPane!=0 )
            {
                  conditions here......

            }

and thats solved.

这篇关于崩溃的节目图像的长宽比的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！