362 lines
12 KiB
C++
362 lines
12 KiB
C++
#include "TaoFrameLessView.h"
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#include <QGuiApplication>
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#include <QQuickItem>
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#include <QScreen>
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#include <QWindow>
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#include <VersionHelpers.h>
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#include <WinUser.h>
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#include <dwmapi.h>
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#include <objidl.h> // Fixes error C2504: 'IUnknown' : base class undefined
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#include <windows.h>
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#include <windowsx.h>
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#include <wtypes.h>
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#pragma comment(lib, "Dwmapi.lib") // Adds missing library, fixes error LNK2019: unresolved
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#pragma comment(lib, "User32.lib")
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#pragma comment(lib, "Gdi32.lib")
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// we cannot just use WS_POPUP style
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// WS_THICKFRAME: without this the window cannot be resized and so aero snap, de-maximizing and minimizing won't work
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// WS_SYSMENU: enables the context menu with the move, close, maximize, minize... commands (shift + right-click on the task bar item)
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// WS_CAPTION: enables aero minimize animation/transition
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// WS_MAXIMIZEBOX, WS_MINIMIZEBOX: enable minimize/maximize
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enum class Style : DWORD
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{
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windowed = WS_OVERLAPPEDWINDOW | WS_THICKFRAME | WS_CAPTION | WS_SYSMENU | WS_MAXIMIZEBOX | WS_MINIMIZEBOX,
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aero_borderless = WS_POPUP | WS_THICKFRAME | WS_CAPTION | WS_SYSMENU | WS_MAXIMIZEBOX | WS_MINIMIZEBOX,
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basic_borderless = WS_POPUP | WS_THICKFRAME | WS_SYSMENU | WS_MAXIMIZEBOX | WS_MINIMIZEBOX
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};
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static bool isCompositionEnabled()
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{
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BOOL composition_enabled = FALSE;
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bool success = ::DwmIsCompositionEnabled(&composition_enabled) == S_OK;
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return composition_enabled && success;
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}
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static Style selectBorderLessStyle()
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{
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return isCompositionEnabled() ? Style::aero_borderless : Style::basic_borderless;
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}
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static void setShadow(HWND handle, bool enabled)
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{
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if (isCompositionEnabled())
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{
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static const MARGINS shadow_state[2] { { 0, 0, 0, 0 }, { 1, 1, 1, 1 } };
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::DwmExtendFrameIntoClientArea(handle, &shadow_state[enabled]);
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}
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}
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static long hitTest(RECT winrect, long x, long y, int borderWidth)
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{
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// 鼠标区域位于窗体边框，进行缩放
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if ((x >= winrect.left) && (x < winrect.left + borderWidth) && (y >= winrect.top) && (y < winrect.top + borderWidth))
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{
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return HTTOPLEFT;
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}
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else if (x < winrect.right && x >= winrect.right - borderWidth && y >= winrect.top && y < winrect.top + borderWidth)
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{
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return HTTOPRIGHT;
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}
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else if (x >= winrect.left && x < winrect.left + borderWidth && y < winrect.bottom && y >= winrect.bottom - borderWidth)
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{
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return HTBOTTOMLEFT;
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}
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else if (x < winrect.right && x >= winrect.right - borderWidth && y < winrect.bottom && y >= winrect.bottom - borderWidth)
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{
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return HTBOTTOMRIGHT;
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}
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else if (x >= winrect.left && x < winrect.left + borderWidth)
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{
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return HTLEFT;
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}
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else if (x < winrect.right && x >= winrect.right - borderWidth)
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{
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return HTRIGHT;
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}
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else if (y >= winrect.top && y < winrect.top + borderWidth)
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{
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return HTTOP;
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}
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else if (y < winrect.bottom && y >= winrect.bottom - borderWidth)
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{
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return HTBOTTOM;
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}
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else
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{
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return 0;
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}
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}
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static bool isMaxWin(QWindow* win)
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{
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return win->windowState() == Qt::WindowMaximized;
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}
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static bool isFullWin(QQuickView* win)
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{
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return win->windowState() == Qt::WindowFullScreen;
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}
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class TaoFrameLessViewPrivate
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{
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public:
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bool m_firstRun = true;
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bool m_isMax = false;
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bool m_isFull = false;
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QQuickItem* m_titleItem = nullptr;
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HMENU mMenuHandler = NULL;
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bool borderless = true; // is the window currently borderless
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bool borderless_resize = true; // should the window allow resizing by dragging the borders while borderless
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bool borderless_drag = true; // should the window allow moving my dragging the client area
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bool borderless_shadow = true; // should the window display a native aero shadow while borderless
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void setBorderLess(HWND handle, bool enabled)
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{
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auto newStyle = enabled ? selectBorderLessStyle() : Style::windowed;
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auto oldStyle = static_cast<Style>(::GetWindowLongPtrW(handle, GWL_STYLE));
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if (oldStyle != newStyle)
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{
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borderless = enabled;
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::SetWindowLongPtrW(handle, GWL_STYLE, static_cast<LONG>(newStyle));
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// when switching between borderless and windowed, restore appropriate shadow state
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setShadow(handle, borderless_shadow && (newStyle != Style::windowed));
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// redraw frame
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::SetWindowPos(handle, nullptr, 0, 0, 0, 0, SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOSIZE);
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::ShowWindow(handle, SW_SHOW);
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}
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}
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void setBorderLessShadow(HWND handle, bool enabled)
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{
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if (borderless)
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{
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borderless_shadow = enabled;
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setShadow(handle, enabled);
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}
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}
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};
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TaoFrameLessView::TaoFrameLessView(QWindow* parent)
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: QQuickView(parent)
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, d(new TaoFrameLessViewPrivate)
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{
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//此处不需要设置flags
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// setFlags(Qt::CustomizeWindowHint | Qt::Window | Qt::FramelessWindowHint | Qt::WindowMinMaxButtonsHint | Qt::WindowTitleHint |
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// Qt::WindowSystemMenuHint);
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setResizeMode(SizeRootObjectToView);
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setIsMax(windowState() == Qt::WindowMaximized);
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setIsFull(windowState() == Qt::WindowFullScreen);
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connect(this, &QWindow::windowStateChanged, this, [&](Qt::WindowState state) {
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(void)state;
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setIsMax(windowState() == Qt::WindowMaximized);
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setIsFull(windowState() == Qt::WindowFullScreen);
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});
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}
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void TaoFrameLessView::showEvent(QShowEvent* e)
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{
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if (d->m_firstRun)
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{
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d->m_firstRun = false;
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//第一次show的时候，设置无边框。不在构造函数中设置。取winId会触发QWindowsWindow::create,直接创建win32窗口,引起错乱(win7 或者虚拟机启动即黑屏)。
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d->setBorderLess((HWND)(winId()), d->borderless);
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{
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// Qt 5.15.2 的bug; 问题复现及解决方法：当使用WM_NCCALCSIZE 修改非客户区大小后，移动窗口到其他屏幕时，qwindows.dll 源码 qwindowswindow.cpp:2447
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// updateFullFrameMargins() 函数 处会调用qwindowswindow.cpp:2453 的
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// calculateFullFrameMargins函数重新获取默认的非客户区大小，导致最外层窗口移动屏幕时会触发resize消息，引起40像素左右的黑边；故此处创建Menu
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// 使其调用qwindowswindow.cpp:2451 的 QWindowsContext::forceNcCalcSize() 函数计算非客户区大小
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//已知负面效果: 引入win32 MENU后，Qt程序中如果有alt开头的快捷键，会不生效，被Qt滤掉了，需要修改Qt源码
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// QWindowsKeyMapper::translateKeyEventInternal 中的
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// if (msgType == WM_SYSKEYDOWN && (nModifiers & AltAny) != 0 && GetMenu(msg.hwnd) != nullptr)
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// return false;
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// 这两行屏蔽掉
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d->mMenuHandler = ::CreateMenu();
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::SetMenu((HWND)winId(), d->mMenuHandler);
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}
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}
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Super::showEvent(e);
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}
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TaoFrameLessView::~TaoFrameLessView()
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{
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if (d->mMenuHandler != NULL)
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{
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::DestroyMenu(d->mMenuHandler);
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}
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delete d;
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}
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bool TaoFrameLessView::isMax() const
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{
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return d->m_isMax;
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}
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bool TaoFrameLessView::isFull() const
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{
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return d->m_isFull;
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}
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QQuickItem* TaoFrameLessView::titleItem() const
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{
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return d->m_titleItem;
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}
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void TaoFrameLessView::setTitleItem(QQuickItem* item)
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{
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d->m_titleItem = item;
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}
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QRect TaoFrameLessView::calcCenterGeo(const QRect& screenGeo, const QSize& normalSize)
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{
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int w = normalSize.width();
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int h = normalSize.height();
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int x = screenGeo.x() + (screenGeo.width() - w) / 2;
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int y = screenGeo.y() + (screenGeo.height() - h) / 2;
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if (screenGeo.width() < w)
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{
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x = screenGeo.x();
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w = screenGeo.width();
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}
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if (screenGeo.height() < h)
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{
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y = screenGeo.y();
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h = screenGeo.height();
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}
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return { x, y, w, h };
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}
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void TaoFrameLessView::moveToScreenCenter()
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{
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auto geo = calcCenterGeo(screen()->availableGeometry(), size());
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if (minimumWidth() > geo.width() || minimumHeight() > geo.height())
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{
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setMinimumSize(geo.size());
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}
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setGeometry(geo);
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update();
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}
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void TaoFrameLessView::setIsMax(bool isMax)
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{
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if (d->m_isMax == isMax)
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return;
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d->m_isMax = isMax;
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emit isMaxChanged(d->m_isMax);
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}
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void TaoFrameLessView::setIsFull(bool isFull)
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{
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if (d->m_isFull == isFull)
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return;
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d->m_isFull = isFull;
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emit isFullChanged(d->m_isFull);
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}
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void TaoFrameLessView::resizeEvent(QResizeEvent* e)
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{
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// SetWindowRgn(HWND(winId()), CreateRoundRectRgn(0, 0, width(), height(), 4, 4), true);
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Super::resizeEvent(e);
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}
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#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
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bool TaoFrameLessView::nativeEvent(const QByteArray& eventType, void* message, qintptr* result)
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#else
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bool TaoFrameLessView::nativeEvent(const QByteArray& eventType, void* message, long* result)
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#endif
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{
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const long border_width = 4;
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if (!result)
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{
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//防御式编程
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//一般不会发生这种情况，win7一些极端情况，会传空指针进来。解决方案是升级驱动、切换到basic主题。
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return false;
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}
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#if (QT_VERSION == QT_VERSION_CHECK(5, 11, 1))
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// Work-around a bug caused by typo which only exists in Qt 5.11.1
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const auto msg = *reinterpret_cast<MSG**>(message);
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#else
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const auto msg = static_cast<LPMSG>(message);
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#endif
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if (!msg || !msg->hwnd)
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{
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return false;
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}
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switch (msg->message)
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{
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case WM_NCCALCSIZE: {
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#if 1
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const auto mode = static_cast<BOOL>(msg->wParam);
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const auto clientRect = mode ? &(reinterpret_cast<LPNCCALCSIZE_PARAMS>(msg->lParam)->rgrc[0]) : reinterpret_cast<LPRECT>(msg->lParam);
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if (mode == TRUE && d->borderless)
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{
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*result = WVR_REDRAW;
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//规避 拖动border进行resize时界面闪烁
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if (!isMaxWin(this) && !isFullWin(this))
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{
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if (clientRect->top != 0)
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{
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clientRect->top -= 0.1;
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}
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}
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else
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{
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if (clientRect->top != 0)
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{
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clientRect->top += 0.1;
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}
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}
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return true;
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}
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#else
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*result = 0;
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return true;
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#endif
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break;
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}
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case WM_NCACTIVATE: {
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if (!isCompositionEnabled())
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{
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// Prevents window frame reappearing on window activation
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// in "basic" theme, where no aero shadow is present.
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*result = 1;
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return true;
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}
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break;
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}
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case WM_NCHITTEST: {
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if (d->borderless)
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{
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RECT winrect;
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GetWindowRect(HWND(winId()), &winrect);
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long x = GET_X_LPARAM(msg->lParam);
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long y = GET_Y_LPARAM(msg->lParam);
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*result = 0;
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if (!isMaxWin(this) && !isFullWin(this))
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{ //非最大化、非全屏时，进行命中测试，处理边框拖拽
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*result = hitTest(winrect, x, y, border_width);
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if (0 != *result)
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{
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return true;
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}
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}
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if (d->m_titleItem)
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{
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auto titlePos = d->m_titleItem->mapToGlobal({ 0, 0 });
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titlePos = mapFromGlobal(titlePos.toPoint());
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auto titleRect = QRect(titlePos.x(), titlePos.y(), d->m_titleItem->width(), d->m_titleItem->height());
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double dpr = qApp->devicePixelRatio();
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QPoint pos = mapFromGlobal(QPoint(x / dpr, y / dpr));
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if (titleRect.contains(pos))
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{
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*result = HTCAPTION;
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return true;
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}
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}
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return false;
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}
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break;
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} // end case WM_NCHITTEST
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}
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return Super::nativeEvent(eventType, message, result);
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}
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