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[MAGNIFY] Minor fixes for zoom handling.

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- Zoom factor is unsigned.
- It is comprised between 1 and 9, other values are invalid.
- Check for value validity when reading the zoom string from the combo-list.
This commit is contained in:
Hermès Bélusca-Maïto 2019-06-15 18:33:28 +02:00
parent 9ade0e7b04
commit 4e91b6d5db
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GPG key ID: 3B2539C65E7B93D0
3 changed files with 22 additions and 17 deletions
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15
base/applications/magnify/magnifier.c
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@ -404,8 +404,8 @@ void Draw(HDC aDc)
DeleteDC(hdcOffscreen);
}
sourceWidth = AppWidth / iZoom;
sourceHeight = AppHeight / iZoom;
sourceWidth = AppWidth / uiZoom;
sourceHeight = AppHeight / uiZoom;
/* Create a memory DC compatible with client area DC */
hdcOffscreen = CreateCompatibleDC(desktopHdc);
@ -882,7 +882,7 @@ INT_PTR CALLBACK OptionsProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lPar
break;
case WM_INITDIALOG:
{
// Add the zoom items...
/* Add the zoom items */
SendDlgItemMessage(hDlg, IDC_ZOOM, CB_ADDSTRING, 0, (LPARAM)("1"));
SendDlgItemMessage(hDlg, IDC_ZOOM, CB_ADDSTRING, 0, (LPARAM)("2"));
SendDlgItemMessage(hDlg, IDC_ZOOM, CB_ADDSTRING, 0, (LPARAM)("3"));
@ -891,8 +891,10 @@ INT_PTR CALLBACK OptionsProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lPar
SendDlgItemMessage(hDlg, IDC_ZOOM, CB_ADDSTRING, 0, (LPARAM)("6"));
SendDlgItemMessage(hDlg, IDC_ZOOM, CB_ADDSTRING, 0, (LPARAM)("7"));
SendDlgItemMessage(hDlg, IDC_ZOOM, CB_ADDSTRING, 0, (LPARAM)("8"));
SendDlgItemMessage(hDlg, IDC_ZOOM, CB_ADDSTRING, 0, (LPARAM)("9"));
SendDlgItemMessage(hDlg, IDC_ZOOM, CB_SETCURSEL, iZoom - 1, 0);
if (uiZoom >= 1 && uiZoom <= 9)
SendDlgItemMessage(hDlg, IDC_ZOOM, CB_SETCURSEL, uiZoom - 1, 0);
if (bFollowMouse)
SendDlgItemMessage(hDlg,IDC_FOLLOWMOUSECHECK,BM_SETCHECK , wParam ,0);
@ -936,7 +938,10 @@ INT_PTR CALLBACK OptionsProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lPar
/* Get index of current selection and the text of that selection */
int currentSelectionIndex = ComboBox_GetCurSel(hCombo);
ComboBox_GetLBText(hCombo, currentSelectionIndex, currentZoomValue);
iZoom = _ttoi(currentZoomValue);
uiZoom = (UINT)_ttoi(currentZoomValue);
/* The zoom factor cannot be smaller than 1 (and not zero) or greater than 9 */
if (uiZoom < 1 || uiZoom > 9)
uiZoom = 1;
/* Trigger the Draw function to rezoom (which will be set false automatically after rezooming) */
bRecreateOffscreenDC = TRUE;