1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "chrome_frame/infobars/internal/displaced_window_manager.h" 6 7 DisplacedWindowManager::DisplacedWindowManager() { 8 } 9 10 void DisplacedWindowManager::UpdateLayout() { 11 // Call SetWindowPos with SWP_FRAMECHANGED for displaced window. 12 // Displaced window will receive WM_NCCALCSIZE to recalculate its client size. 13 ::SetWindowPos(m_hWnd, 14 NULL, 0, 0, 0, 0, 15 SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | 16 SWP_FRAMECHANGED); 17 } 18 19 LRESULT DisplacedWindowManager::OnNcCalcSize(BOOL calc_valid_rects, 20 LPARAM lparam) { 21 // Ask the original window proc to calculate the 'natural' size of the window. 22 LRESULT ret = DefWindowProc(WM_NCCALCSIZE, 23 static_cast<WPARAM>(calc_valid_rects), lparam); 24 if (lparam == NULL) 25 return ret; 26 27 // Whether calc_valid_rects is true or false, we could treat beginning of 28 // lparam as a RECT object. 29 RECT* rect = reinterpret_cast<RECT*>(lparam); 30 RECT natural_rect = *rect; 31 if (delegate() != NULL) 32 delegate()->AdjustDisplacedWindowDimensions(rect); 33 34 // If we modified the window's dimensions, there is no way to respect a custom 35 // "client-area preservation strategy", so we must force a redraw to be safe. 36 if (calc_valid_rects && ret == WVR_VALIDRECTS && 37 !EqualRect(&natural_rect, rect)) { 38 ret = WVR_REDRAW; 39 } 40 41 return ret; 42 } 43
