// This is necessary to get the width of the buttons in the toolbar,
// including the width of separators, so that we can accurately position the tooltip adjacent
// to the currently hot button when the user uses keyboard navigation to access the toolbar.
internal int GetButtonWidth()
{
// Assume that this button is the same width as the parent's ButtonSize's Width
int buttonWidth = Parent.ButtonSize.Width;
var button = new ComCtl32.TBBUTTONINFOW
{
cbSize = (uint)Marshal.SizeOf <ComCtl32.TBBUTTONINFOW>(),
dwMask = ComCtl32.TBIF.SIZE
};
int buttonID = (int)User32.SendMessageW(Parent, (User32.WindowMessage)ComCtl32.TB.GETBUTTONINFOW, (IntPtr)commandId, ref button);
if (buttonID != -1)
{
buttonWidth = button.cx;
}
return(buttonWidth);
}
/// <summary>
/// Returns a TBBUTTONINFOW object that represents this ToolBarButton.
/// </summary>
internal ComCtl32.TBBUTTONINFOW GetTBBUTTONINFO(bool updateText, int newCommandId)
{
var button = new ComCtl32.TBBUTTONINFOW
{
cbSize = (uint)Marshal.SizeOf <ComCtl32.TBBUTTONINFOW>(),
dwMask = ComCtl32.TBIF.IMAGE | ComCtl32.TBIF.STATE | ComCtl32.TBIF.STYLE
};
// Older platforms interpret null strings as empty, which forces the button to
// leave space for text.
// The only workaround is to avoid having comctl update the text.
if (updateText)
{
button.dwMask |= ComCtl32.TBIF.TEXT;
}
button.iImage = ImageIndexer.ActualIndex;
if (newCommandId != commandId)
{
commandId = newCommandId;
button.idCommand = newCommandId;
button.dwMask |= ComCtl32.TBIF.COMMAND;
}
// set up the state of the button
button.fsState = 0;
if (enabled)
{
button.fsState |= ComCtl32.TBSTATE.ENABLED;
}
if (partialPush && style == ToolBarButtonStyle.ToggleButton)
{
button.fsState |= ComCtl32.TBSTATE.INDETERMINATE;
}
if (pushed)
{
button.fsState |= ComCtl32.TBSTATE.CHECKED;
}
if (!visible)
{
button.fsState |= ComCtl32.TBSTATE.HIDDEN;
}
// set the button style
switch (style)
{
case ToolBarButtonStyle.PushButton:
button.fsStyle = (byte)ComCtl32.TBSTYLE.BUTTON;
break;
case ToolBarButtonStyle.ToggleButton:
button.fsStyle = (byte)ComCtl32.TBSTYLE.CHECK;
break;
case ToolBarButtonStyle.Separator:
button.fsStyle = (byte)ComCtl32.TBSTYLE.SEP;
break;
}
if (text == null)
{
button.pszText = Marshal.StringToHGlobalAuto("\0\0");
}
else
{
string textValue = text;
PrefixAmpersands(ref textValue);
button.pszText = Marshal.StringToHGlobalAuto(textValue);
}
return(button);
}