nativemethods.cs

Linux 恢复盘制作工具 process调用busybox dd实现写*.img镜像

        [StructLayout(LayoutKind.Sequential)]
        public struct WINDOWPOS
        {
            public IntPtr hwnd;
            public IntPtr hwndInsertAfter;
            public int x;
            public int y;
            public int cx;
            public int cy;
            public int flags;
        }

        // Various flavours of SendMessage: plain vanilla, and passing references to various structures
        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr SendMessage(IntPtr hWnd, int msg, int wParam, int lParam);
        [DllImport("user32.dll", EntryPoint = "SendMessage", CharSet = CharSet.Auto)]
        private static extern IntPtr SendMessageLVItem(IntPtr hWnd, int msg, int wParam, ref LVITEM lvi);
        //[DllImport("user32.dll", EntryPoint = "SendMessage", CharSet = CharSet.Auto)]
        //private static extern IntPtr SendMessageLVColumn(IntPtr hWnd, int m, int wParam, ref LVCOLUMN lvc);
        [DllImport("user32.dll", EntryPoint = "SendMessage", CharSet = CharSet.Auto)]
        private static extern IntPtr SendMessageHDItem(IntPtr hWnd, int msg, int wParam, ref HDITEM hdi);
        [DllImport("user32.dll", EntryPoint = "SendMessage", CharSet = CharSet.Auto)]
        public static extern IntPtr SendMessageHDHITTESTINFO(IntPtr hWnd, int Msg, IntPtr wParam, [In, Out] HDHITTESTINFO lParam);
        [DllImport("user32.dll", EntryPoint = "SendMessage", CharSet = CharSet.Auto)]
        public static extern IntPtr SendMessageTOOLINFO(IntPtr hWnd, int Msg, int wParam, NativeMethods.TOOLINFO lParam);

        // Entry points used by this code
        [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
        public static extern bool GetScrollInfo(IntPtr hWnd, int fnBar, SCROLLINFO si);

        [DllImport("user32.dll", EntryPoint = "GetUpdateRect", CharSet = CharSet.Auto)]
        private static extern int GetUpdateRectInternal(IntPtr hWnd, ref Rectangle r, bool eraseBackground);

        [DllImport("comctl32.dll", CharSet = CharSet.Auto)]
        private static extern bool ImageList_Draw(IntPtr himl, int i, IntPtr hdcDst, int x, int y, int fStyle);

        //[DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
        //public static extern bool SetScrollInfo(IntPtr hWnd, int fnBar, SCROLLINFO si, bool fRedraw);

        [DllImport("user32.dll", EntryPoint = "ValidateRect", CharSet = CharSet.Auto)]
        private static extern IntPtr ValidatedRectInternal(IntPtr hWnd, ref Rectangle r);

        public static bool DrawImageList(Graphics g, ImageList il, int index, int x, int y, bool isSelected)
        {
            int flags = ILD_TRANSPARENT;
            if (isSelected)
                flags |= ILD_BLEND25;
            bool result = ImageList_Draw(il.Handle, index, g.GetHdc(), x, y, flags);
            g.ReleaseHdc();
            return result;
        }

        /// <summary>
        /// Make sure the ListView has the extended style that says to display subitem images.
        /// </summary>
        /// <remarks>This method must be called after any .NET call that update the extended styles
        /// since they seem to erase this setting.</remarks>
        /// <param name="list">The listview to send a m to</param>
        public static void ForceSubItemImagesExStyle(ListView list) {
            SendMessage(list.Handle, LVM_SETEXTENDEDLISTVIEWSTYLE, LVS_EX_SUBITEMIMAGES, LVS_EX_SUBITEMIMAGES);
        }

        /// <summary>
        /// Calculates the number of items that can fit vertically in the visible area of a list-view (which
        /// must be in details or list view.
        /// </summary>
        /// <param name="list">The listView</param>
        /// <returns>Number of visible items per page</returns>
        public static int GetCountPerPage(ListView list)
        {
            return (int)SendMessage(list.Handle, LVM_GETCOUNTPERPAGE, 0, 0);
        }
        /// <summary>
        /// For the given item and subitem, make it display the given image
        /// </summary>
        /// <param name="list">The listview to send a m to</param>
        /// <param name="itemIndex">row number (0 based)</param>
        /// <param name="subItemIndex">subitem (0 is the item itself)</param>
        /// <param name="imageIndex">index into the image list</param>
        public static void SetSubItemImage(ListView list, int itemIndex, int subItemIndex, int imageIndex) {
            LVITEM lvItem = new LVITEM();
            lvItem.mask = LVIF_IMAGE;
            lvItem.iItem = itemIndex;
            lvItem.iSubItem = subItemIndex;
            lvItem.iImage = imageIndex;
            SendMessageLVItem(list.Handle, LVM_SETITEM, 0, ref lvItem);
        }

        /// <summary>
        /// Setup the given column of the listview to show the given image to the right of the text.
        /// If the image index is -1, any previous image is cleared
        /// </summary>
        /// <param name="list">The listview to send a m to</param>
        /// <param name="columnIndex">Index of the column to modifiy</param>
        /// <param name="order"></param>
        /// <param name="imageIndex">Index into the small image list</param>
        public static void SetColumnImage(ListView list, int columnIndex, SortOrder order, int imageIndex) {
            IntPtr hdrCntl = NativeMethods.GetHeaderControl(list);
            if (hdrCntl.ToInt32() == 0)
                return;

            HDITEM item = new HDITEM();
            item.mask = HDI_FORMAT;
            IntPtr result = SendMessageHDItem(hdrCntl, HDM_GETITEM, columnIndex, ref item);

            item.fmt &= ~(HDF_SORTUP | HDF_SORTDOWN | HDF_IMAGE | HDF_BITMAP_ON_RIGHT);

            if (NativeMethods.HasBuiltinSortIndicators()) {
                if (order == SortOrder.Ascending)
                    item.fmt |= HDF_SORTUP;
                if (order == SortOrder.Descending)
                    item.fmt |= HDF_SORTDOWN;
            }
            else {
                item.mask |= HDI_IMAGE;
                item.fmt |= (HDF_IMAGE | HDF_BITMAP_ON_RIGHT);
                item.iImage = imageIndex;
            }

            result = SendMessageHDItem(hdrCntl, HDM_SETITEM, columnIndex, ref item);
        }

        /// <summary>
        /// Does this version of the operating system have builtin sort indicators?
        /// </summary>
        /// <returns>Are there builtin sort indicators</returns>
        /// <remarks>XP and later have these</remarks>
        public static bool HasBuiltinSortIndicators( ) {
            return OSFeature.Feature.GetVersionPresent(OSFeature.Themes) != null;
        }

        /// <summary>
        /// Return the bounds of the update region on the given control.
        /// </summary>
        /// <remarks>The BeginPaint() system call validates the update region, effectively wiping out this information.
        /// So this call has to be made before the BeginPaint() call.</remarks>
        /// <param name="cntl">The control whose update region is be calculated</param>
        /// <returns>A rectangle</returns>
        public static Rectangle GetUpdateRect(Control cntl) {
            Rectangle r = new Rectangle();
            GetUpdateRectInternal(cntl.Handle, ref r, false);
            return r;
        }

        /// <summary>
        /// Validate an area of the given control. A validated area will not be repainted at the next redraw.
        /// </summary>
        /// <param name="cntl">The control to be validated</param>
        /// <param name="r">The area of the control to be validated</param>
        public static void ValidateRect(Control cntl, Rectangle r) {
            ValidatedRectInternal(cntl.Handle, ref r);
        }

        /// <summary>
        /// Select all rows on the given listview
        /// </summary>
        /// <param name="list">The listview whose items are to be selected</param>
        public static void SelectAllItems(ListView list) {
            NativeMethods.SetItemState(list, -1, 2, 2);
        }

        /// <summary>
        /// Deselect all rows on the given listview
        /// </summary>
        /// <param name="list">The listview whose items are to be deselected</param>
        public static void DeselectAllItems(ListView list) {
            NativeMethods.SetItemState(list, -1, 2, 0);
        }

        /// <summary>
        /// Set the item state on the given item
        /// </summary>
        /// <param name="list">The listview whose item's state is to be changed</param>
        /// <param name="itemIndex">The index of the item to be changed</param>
        /// <param name="mask">Which bits of the value are to be set?</param>
        /// <param name="value">The value to be set</param>
        public static void SetItemState(ListView list, int itemIndex, int mask, int value) {
            LVITEM lvItem = new LVITEM();
            lvItem.stateMask = mask;
            lvItem.state = value;
            SendMessageLVItem(list.Handle, LVM_SETITEMSTATE, itemIndex, ref lvItem);
        }

        /// <summary>
        /// Scroll the given listview by the given deltas
        /// </summary>
        /// <param name="list"></param>
        /// <param name="dx"></param>
        /// <param name="dy"></param>
        /// <returns>true if the scroll succeeded</returns>
        public static bool Scroll(ListView list, int dx, int dy) {
            return SendMessage(list.Handle, LVM_SCROLL, dx, dy) != IntPtr.Zero;
        }

        /// <summary>
        /// Return the handle to the header control on the given list
        /// </summary>
        /// <param name="list">The listview whose header control is to be returned</param>
        /// <returns>The handle to the header control</returns>
        public static IntPtr GetHeaderControl(ListView list) {
            return SendMessage(list.Handle, LVM_GETHEADER, 0, 0);
        }

        /// <summary>
        /// Return the index of the divider under the given point. Return -1 if no divider is under the pt
        /// </summary>
        /// <param name="handle">The list we are interested in</param>
        /// <param name="pt">The client co-ords</param>
        /// <returns>The index of the divider under the point, or -1 if no divider is under that point</returns>
        public static int GetDividerUnderPoint(IntPtr handle, Point pt) {
            const int HHT_ONDIVIDER = 4;
            return NativeMethods.HeaderControlHitTest(handle, pt, HHT_ONDIVIDER);
        }

        /// <summary>
        /// Return the index of the column of the header that is under the given point.
        /// Return -1 if no column is under the pt
        /// </summary>
        /// <param name="handle">The list we are interested in</param>
        /// <param name="pt">The client co-ords</param>
        /// <returns>The index of the column under the point, or -1 if no column header is under that point</returns>
        public static int GetColumnUnderPoint(IntPtr handle, Point pt) {
            const int HHT_ONHEADER = 2;
            return NativeMethods.HeaderControlHitTest(handle, pt, HHT_ONHEADER);
        }

        private static int HeaderControlHitTest(IntPtr handle, Point pt, int flag) {
            HDHITTESTINFO testInfo = new HDHITTESTINFO();
            testInfo.pt_x = pt.X;
            testInfo.pt_y = pt.Y;
            IntPtr result = NativeMethods.SendMessageHDHITTESTINFO(handle, HDM_HITTEST, IntPtr.Zero, testInfo);
            if ((testInfo.flags & flag) != 0)
                return result.ToInt32();
            else
                return -1;
        }

        /// <summary>
        /// Get the scroll position of the given scroll bar
        /// </summary>
        /// <param name="handle"></param>
        /// <param name="horizontalBar"></param>
        /// <returns></returns>
        public static int GetScrollPosition(IntPtr handle, bool horizontalBar) {
            int fnBar = (horizontalBar ? SB_HORZ : SB_VERT);

            SCROLLINFO si = new SCROLLINFO();
            si.fMask = SIF_POS;
            if (GetScrollInfo(handle, fnBar, si))
                return si.nPos;
            else
                return -1;
        }
    }
}