public static int GetScrollPosition(this WindowHandle window, ScrollBar scrollBar) => WindowMethods.GetScrollPosition(window, scrollBar);
public static int SetScrollPosition(this WindowHandle window, ScrollBar scrollBar, int position, bool redraw) => WindowMethods.SetScrollPosition(window, scrollBar, position, redraw);
public static int SetScrollInfo(this WindowHandle window, ScrollBar scrollBar, ref SCROLLINFO scrollInfo, bool redraw) => WindowMethods.SetScrollInfo(window, scrollBar, ref scrollInfo, redraw);
public static RECT GetWindowRectangle(this WindowHandle window) => WindowMethods.GetWindowRectangle(window);
public static void SetScrollRange(this WindowHandle window, ScrollBar scrollBar, int min, int max, bool redraw) => WindowMethods.SetScrollRange(window, scrollBar, min, max, redraw);
static LRESULT WindowProcedure(WindowHandle window, WindowMessage message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WindowMessage.Size:
int cxClient = lParam.LowWord;
int cyClient = lParam.HighWord;
apt[0].x = cxClient / 4;
apt[0].y = cyClient / 2;
apt[1].x = cxClient / 2;
apt[1].y = cyClient / 4;
apt[2].x = cxClient / 2;
apt[2].y = 3 * cyClient / 4;
apt[3].x = 3 * cxClient / 4;
apt[3].y = cyClient / 2;
return(0);
case WindowMessage.LeftButtonDown:
case WindowMessage.RightButtonDown:
case WindowMessage.MouseMove:
MouseKey mk = (MouseKey)wParam.LowWord;
if ((mk & (MouseKey.LeftButton | MouseKey.RightButton)) != 0)
{
using (DeviceContext dc = window.GetDeviceContext())
{
dc.SelectObject(StockPen.White);
DrawBezier(dc, apt);
if ((mk & MouseKey.LeftButton) != 0)
{
apt[1].x = lParam.LowWord;
apt[1].y = lParam.HighWord;
}
if ((mk & MouseKey.RightButton) != 0)
{
apt[2].x = lParam.LowWord;
apt[2].y = lParam.HighWord;
}
dc.SelectObject(StockPen.Black);
DrawBezier(dc, apt);
}
}
return(0);
case WindowMessage.Paint:
window.Invalidate(true);
using (DeviceContext dc = window.BeginPaint())
{
DrawBezier(dc, apt);
}
return(0);
case WindowMessage.Destroy:
WindowMethods.PostQuitMessage(0);
return(0);
}
return(WindowMethods.DefaultWindowProcedure(window, message, wParam, lParam));
}
public static CommandId MessageBox(this WindowHandle owner, string text, string caption, MessageBoxType type = MessageBoxType.Ok) => WindowMethods.MessageBox(owner, text, caption, type);
public static string GetClassName(this WindowHandle window) => WindowMethods.GetClassName(window);
public static bool IsWindowVisible(this WindowHandle window) => WindowMethods.IsWindowVisible(window);
public static WindowHandle GetTopWindow(this WindowHandle window) => WindowMethods.GetTopWindow(window);
public static WindowHandle GetParent(this WindowHandle window) => WindowMethods.GetParent(window);
public static WindowHandle GetWindow(this WindowHandle window, GetWindowOption option) => WindowMethods.GetWindow(window, option);
public static bool ShowWindow(this WindowHandle window, ShowWindow command) => WindowMethods.ShowWindow(window, command);
static LRESULT CallDefaultProcedure(WindowHandle window, WindowMessage message, WPARAM wParam, LPARAM lParam)
{
return(WindowMethods.DefaultWindowProcedure(window, message, wParam, lParam));
}
public static void GetScrollInfo(this WindowHandle window, ScrollBar scrollBar, ref SCROLLINFO scrollInfo) => WindowMethods.GetScrollInfo(window, scrollBar, ref scrollInfo);
public static bool IsWindowUnicode(this WindowHandle window) => WindowMethods.IsWindowUnicode(window);
public static int ScrollWindow(this WindowHandle window, int dx, int dy) => WindowMethods.ScrollWindow(window, dx, dy);
static LRESULT WindowProcedure(WindowHandle window, WindowMessage message, WPARAM wParam, LPARAM lParam)
{
SCROLLINFO si;
switch (message)
{
case WindowMessage.Create:
using (DeviceContext dc = window.GetDeviceContext())
{
dc.GetTextMetrics(out TEXTMETRIC tm);
cxChar = tm.tmAveCharWidth;
cxCaps = ((tm.tmPitchAndFamily.PitchTypes & FontPitchTypes.VariablePitch) != 0 ? 3 : 2) * cxChar / 2;
cyChar = tm.tmHeight + tm.tmExternalLeading;
}
// Save the width of the three columns
iMaxWidth = 40 * cxChar + 22 * cxCaps;
return(0);
case WindowMessage.Size:
cxClient = lParam.LowWord;
cyClient = lParam.HighWord;
// Set vertical scroll bar range and page size
si = new SCROLLINFO
{
fMask = ScrollInfoMask.Range | ScrollInfoMask.Page,
nMin = 0,
nMax = SysMets.sysmetrics.Count - 1,
nPage = (uint)(cyClient / cyChar),
};
window.SetScrollInfo(ScrollBar.Vertical, ref si, true);
// Set horizontal scroll bar range and page size
si.nMax = 2 + iMaxWidth / cxChar;
si.nPage = (uint)(cxClient / cxChar);
window.SetScrollInfo(ScrollBar.Horizontal, ref si, true);
return(0);
case WindowMessage.VerticalScroll:
// Get all the vertical scroll bar information
si = new SCROLLINFO
{
fMask = ScrollInfoMask.All
};
window.GetScrollInfo(ScrollBar.Vertical, ref si);
// Save the position for comparison later on
int iVertPos = si.nPos;
switch ((ScrollCommand)wParam.LowWord)
{
case ScrollCommand.Top:
si.nPos = si.nMin;
break;
case ScrollCommand.Bottom:
si.nPos = si.nMax;
break;
case ScrollCommand.LineUp:
si.nPos -= 1;
break;
case ScrollCommand.LineDown:
si.nPos += 1;
break;
case ScrollCommand.PageUp:
si.nPos -= (int)si.nPage;
break;
case ScrollCommand.PageDown:
si.nPos += (int)si.nPage;
break;
case ScrollCommand.ThumbTrack:
si.nPos = si.nTrackPos;
break;
}
// Set the position and then retrieve it. Due to adjustments
// by Windows it may not be the same as the value set.
si.fMask = ScrollInfoMask.Position;
window.SetScrollInfo(ScrollBar.Vertical, ref si, true);
window.GetScrollInfo(ScrollBar.Vertical, ref si);
// If the position has changed, scroll the window and update it
if (si.nPos != iVertPos)
{
window.ScrollWindow(0, cyChar * (iVertPos - si.nPos));
window.UpdateWindow();
}
return(0);
case WindowMessage.HorizontalScroll:
// Get all the horizontal scroll bar information
si = new SCROLLINFO
{
fMask = ScrollInfoMask.All
};
window.GetScrollInfo(ScrollBar.Horizontal, ref si);
// Save the position for comparison later on
int iHorzPos = si.nPos;
switch ((ScrollCommand)wParam.LowWord)
{
case ScrollCommand.LineLeft:
si.nPos -= 1;
break;
case ScrollCommand.LineRight:
si.nPos += 1;
break;
case ScrollCommand.PageLeft:
si.nPos -= (int)si.nPage;
break;
case ScrollCommand.PageRight:
si.nPos += (int)si.nPage;
break;
case ScrollCommand.ThumbPosition:
si.nPos = si.nTrackPos;
break;
}
// Set the position and then retrieve it. Due to adjustments
// by Windows it may not be the same as the value set.
si.fMask = ScrollInfoMask.Position;
window.SetScrollInfo(ScrollBar.Horizontal, ref si, true);
window.GetScrollInfo(ScrollBar.Horizontal, ref si);
// If the position has changed, scroll the window
if (si.nPos != iHorzPos)
{
window.ScrollWindow(cxChar * (iHorzPos - si.nPos), 0);
}
return(0);
case WindowMessage.KeyDown:
switch ((VirtualKey)wParam)
{
case VirtualKey.Home:
window.SendMessage(WindowMessage.VerticalScroll, (uint)ScrollCommand.Top, 0);
break;
case VirtualKey.End:
window.SendMessage(WindowMessage.VerticalScroll, (uint)ScrollCommand.Bottom, 0);
break;
case VirtualKey.Prior:
window.SendMessage(WindowMessage.VerticalScroll, (uint)ScrollCommand.PageUp, 0);
break;
case VirtualKey.Next:
window.SendMessage(WindowMessage.VerticalScroll, (uint)ScrollCommand.PageDown, 0);
break;
case VirtualKey.Up:
window.SendMessage(WindowMessage.VerticalScroll, (uint)ScrollCommand.LineUp, 0);
break;
case VirtualKey.Down:
window.SendMessage(WindowMessage.VerticalScroll, (uint)ScrollCommand.LineDown, 0);
break;
case VirtualKey.Left:
window.SendMessage(WindowMessage.HorizontalScroll, (uint)ScrollCommand.PageUp, 0);
break;
case VirtualKey.Right:
window.SendMessage(WindowMessage.HorizontalScroll, (uint)ScrollCommand.PageDown, 0);
break;
}
return(0);
case WindowMessage.Paint:
PAINTSTRUCT ps;
using (DeviceContext dc = window.BeginPaint(out ps))
{
// Get vertical scroll bar position
si = new SCROLLINFO
{
fMask = ScrollInfoMask.Position
};
window.GetScrollInfo(ScrollBar.Vertical, ref si);
iVertPos = si.nPos;
// Get horizontal scroll bar position
window.GetScrollInfo(ScrollBar.Horizontal, ref si);
iHorzPos = si.nPos;
// Find painting limits
int iPaintBeg = Math.Max(0, iVertPos + ps.rcPaint.top / cyChar);
int iPaintEnd = Math.Min(SysMets.sysmetrics.Count - 1, iVertPos + ps.rcPaint.bottom / cyChar);
var keys = SysMets.sysmetrics.Keys.ToArray();
for (int i = iPaintBeg; i <= iPaintEnd; i++)
{
var metric = keys[i];
int x = cxChar * (1 - iHorzPos);
int y = cyChar * (i - iVertPos);
dc.TextOut(x, y, metric.ToString());
dc.TextOut(x + 22 * cxCaps, y, SysMets.sysmetrics[metric]);
dc.SetTextAlignment(new TextAlignment(TextAlignment.Horizontal.Right, TextAlignment.Vertical.Top));
dc.TextOut(x + 22 * cxCaps + 40 * cxChar, y, WindowMethods.GetSystemMetrics(metric).ToString());
dc.SetTextAlignment(new TextAlignment(TextAlignment.Horizontal.Left, TextAlignment.Vertical.Top));
}
}
return(0);
case WindowMessage.Destroy:
Windows.PostQuitMessage(0);
return(0);
}
return(Windows.DefaultWindowProcedure(window, message, wParam, lParam));
}
