Resizing items inside group box

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HI, i have one group box inside that i haveseveral elements(some CEdit and CButton)
when i am resizing my window group box is resizing and i want to inside controls also should expand / shrink within the group boxes.
for resizing controls inside group box i have written below logic:

What I have tried:

RepositionControls(CRect& boundingRect)
{
    m_rGroupBox.MoveWindow(boundingRect, TRUE);
    CEdit* rEditPosRightToLeft[] = { &m_rPrefixEdit, &m_rpszFolderpath, &m_rMaxsizectl, &m_rLifetimectl };
    CButton* rButtonPosRightToLeft[] = { &m_rBtnSelect };
    for (size_t z = 0; z < (sizeof(rButtonPosRightToLeft) / sizeof(CButton*)); ++z) {
        CRect rectChildWindow;
        CButton& ctlButton(*rButtonPosRightToLeft[z]);
        ctlButton.GetWindowRect(&rectChildWindow);
        m_rLogStreamResizer.FetchTabDialog().ScreenToClient(&rectChildWindow);
        int nBtnWidth = rectChildWindow.Width();
        int nBtnHeight = rectChildWindow.Height();
        int bx = m_nSideButtonX;
        int by = rectChildWindow.top;
        ctlButton.MoveWindow(bx, by, nBtnWidth, nBtnHeight, TRUE);       
    }
    /*  TODO: need to implement for the  edit controls*/
    for (size_t z = 0; z < (sizeof(rEditPosRightToLeft) / sizeof(CEdit*)); ++z) {
        CRect rectChildWindow;
        CEdit& ctlButton(*rEditPosRightToLeft[z]);
        ctlButton.GetWindowRect(&rectChildWindow);
        m_rLogStreamResizer.FetchTabDialog().ScreenToClient(&rectChildWindow);
        int nBtnWidth = rectChildWindow.Width();
        int nBtnHeight = rectChildWindow.Height();
        int bx = m_nSideButtonX;
        int by = rectChildWindow.top;
        ctlButton.MoveWindow(bx, by, nBtnWidth, nBtnHeight, TRUE);
    }

in above code for CButton logic its working fine but for CEdit controls not working inCEdit control i have chage the width of the edit control depends on resizing
could you please help me here

Posted 24-Jul-17 19:18pm

Member 13089825

Updated 24-Jul-17 20:58pm

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Jochen Arndt · Accepted Answer · 2017-07-24T20:58:00

You have to calculate the width according to the available width, the number of controls, and the spacing between the controls and to the borders.

Assuming you have a left and right space to the borders and a space between the controls the width of a single control can be calculated as:

C++

int availWidth = boundingRect.Width();
int numControls = sizeof(rEditPosRightToLeft) / sizeof(rEditPosRightToLeft[0]);
const int borderSpace = 2; // or whatever you want
const int betweenSpace = 4;
int controlWidth = (availWidth - 2 * borderSpace - (numControls - 1) * betweenSpace) / numControls;

You have also to calculate the left position for each control. It starts at borderSpace and must be incremented by controlWidth + betweenSpace with each loop iteration. If the above controlWidth calculation has a remainder from the final division, you might also get that and use it up while calculating the x positions.