Method DisplayMessageBox

src/Display/Menu.cpp:138–192

Display a M291 message box

// Display a M291 message box
void Menu::DisplayMessageBox(const MessageBox& mbox) noexcept
{
	ResetCache();
	displayingMessageBox = true;
	timeoutValue = 0;

	const PixelNumber topBottomMargin = 4;
	const PixelNumber sideMargin = 4;

	// Draw and a box and clear the interior
	const PixelNumber nr = lcd.GetNumRows(), nc = lcd.GetNumCols();
	lcd.SetRightMargin(nc);
	lcd.Line(topBottomMargin, sideMargin, topBottomMargin, nc - sideMargin - 1, true);
	lcd.Line(topBottomMargin, nc - sideMargin - 1, nr - topBottomMargin - 1, nc - sideMargin - 1, true);
	lcd.Line(nr - topBottomMargin - 1, sideMargin, nr - topBottomMargin - 1, nc - sideMargin - 1, true);
	lcd.Line(topBottomMargin, sideMargin, nr - topBottomMargin - 1, sideMargin, true);
	lcd.Clear(topBottomMargin + 1, sideMargin + 1, nr - topBottomMargin - 1, nc - sideMargin - 1);

	// We could draw the static text directly, but it is easier to use the existing classes
	const uint8_t fontToUse = 0;
	const PixelNumber insideMargin = 2;
	const PixelNumber rowHeight = lcd.GetFontHeight(fontToUse) + 1;
	const PixelNumber top = topBottomMargin + 1 + insideMargin;
	const PixelNumber left = sideMargin + 1 + insideMargin;
	const PixelNumber right = nc - left;
	const PixelNumber availableWidth = right - left;
	AddItem(new TextMenuItem(top, left, availableWidth, MenuItem::CentreAlign, fontToUse, mbox.GetTitle()), false);
	AddItem(new TextMenuItem(top + rowHeight, left, availableWidth, MenuItem::CentreAlign, fontToUse, mbox.GetMessage()), false);	// only 1 row for now

	// Add whichever XYZ jog buttons we have been asked to display - assume only XYZ for now
	const PixelNumber axisButtonWidth = availableWidth/4;
	const PixelNumber axisButtonStep = (availableWidth - 3 *axisButtonWidth)/2 + axisButtonWidth;
	if (mbox.GetControls().IsBitSet(X_AXIS))
	{
		AddItem(new ValueMenuItem(top + 2 * rowHeight, left, axisButtonWidth, MenuItem::CentreAlign, fontToUse, true, nullptr, 510, 1), true);
	}
	if (mbox.GetControls().IsBitSet(Y_AXIS))
	{
		AddItem(new ValueMenuItem(top + 2 * rowHeight, left + axisButtonStep, axisButtonWidth, MenuItem::CentreAlign, fontToUse, true, nullptr, 511, 1), true);
	}
	if (mbox.GetControls().IsBitSet(Z_AXIS))
	{
		AddItem(new ValueMenuItem(top + 2 * rowHeight, left + 2 * axisButtonStep, axisButtonWidth, MenuItem::CentreAlign, fontToUse, true, nullptr, 512, 2), true);
	}

	const PixelNumber okCancelButtonWidth = 30;
	if (mbox.GetMode() & 2)
	{
		AddItem(new ButtonMenuItem(top + 3 * rowHeight, left, okCancelButtonWidth, fontToUse, "OK", "M292 P0", nullptr), true);
	}
	if (mbox.GetMode() & 1)
	{
		AddItem(new ButtonMenuItem(top + 3 * rowHeight, right - okCancelButtonWidth, okCancelButtonWidth, fontToUse, "Cancel", "M292 P1", nullptr), true);
	}
}

// Clear the message box and display the menu underneath it
void Menu::ClearMessageBox() noexcept