423 lines
16 KiB
C++
423 lines
16 KiB
C++
// PreviewTipWnd.cpp
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#include "stdafx.h"
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#include "PreviewTipWnd.h"
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#include "resource.h" // IDI_ICON_SNAPSHOT（循环模式标题栏图标）
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#include <objidl.h> // IUnknown / IStream — gdiplus.h 依赖它们已声明
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#include <gdiplus.h>
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#pragma comment(lib, "gdiplus.lib")
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using namespace Gdiplus;
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namespace {
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constexpr int PADDING = 8;
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constexpr int IMAGE_TEXT_GAP = 6; // 图像与下方文本之间的留白
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constexpr int MIN_TEXT_W = 360;
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constexpr int MAX_TEXT_W = 720; // 文本可换行宽度上限（垂直布局，宽度不再受图像挤压）
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constexpr int MAX_IMAGE_W = 960; // 显示上限（防止 LAN 档 1280 的 JPEG 把窗口顶到屏幕外）
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constexpr int LOADING_W = 480; // 占位的最小宽度（图像未到达时）
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constexpr int LOADING_H = 270;
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} // namespace
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BEGIN_MESSAGE_MAP(CPreviewTipWnd, CWnd)
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ON_WM_PAINT()
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ON_WM_ERASEBKGND()
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ON_WM_DESTROY()
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ON_WM_SIZE()
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ON_WM_GETMINMAXINFO()
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END_MESSAGE_MAP()
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CPreviewTipWnd::CPreviewTipWnd() = default;
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CPreviewTipWnd::~CPreviewTipWnd()
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{
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// m_image 通过 unique_ptr 自动释放
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if (m_hIconSmall) { ::DestroyIcon(m_hIconSmall); m_hIconSmall = nullptr; }
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if (m_hIconBig) { ::DestroyIcon(m_hIconBig); m_hIconBig = nullptr; }
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}
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BOOL CPreviewTipWnd::Create(CWnd* pParent, CPoint anchor, const CStringW& text, int imageReserveW,
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bool loopMode, const CStringW& windowTitle)
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{
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m_text = text;
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m_loopMode = loopMode; // 注意：影响后续 SetImageFromJpeg / OnPaint / OnSize 行为
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m_imageReserveW = imageReserveW > 0 ? min(imageReserveW, MAX_IMAGE_W) : 0;
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m_imageReserveH = m_imageReserveW > 0 ? (m_imageReserveW * 9 / 16) : 0;
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if (m_imageReserveW > 0 && m_imageReserveW < LOADING_W) {
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m_imageReserveW = LOADING_W;
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m_imageReserveH = LOADING_H;
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}
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// 创建字体（项目是 MBCS，但浮窗用宽字符；显式 LOGFONTW + W 版 API 避免编码混淆）
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LOGFONTW lf = {};
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HFONT hSysFont = (HFONT)::GetStockObject(DEFAULT_GUI_FONT);
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if (hSysFont && ::GetObjectW(hSysFont, sizeof(lf), &lf) == 0) {
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hSysFont = nullptr;
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}
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if (!hSysFont) {
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lf.lfHeight = -12;
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wcscpy_s(lf.lfFaceName, L"Microsoft YaHei");
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}
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HFONT hF = ::CreateFontIndirectW(&lf);
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if (hF) m_font.Attach(hF);
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// 窗口类：单发 tooltip 走 CS_SAVEBITS（短时显示，省 BitBlt），
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// 循环窗口是长存窗口，加 CS_HREDRAW|CS_VREDRAW 让拉伸时实时重绘
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UINT classStyle = loopMode ? (CS_HREDRAW | CS_VREDRAW) : CS_SAVEBITS;
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LPCTSTR kClass = AfxRegisterWndClass(
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classStyle,
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::LoadCursor(NULL, IDC_ARROW),
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(HBRUSH)(COLOR_BTNFACE + 1),
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NULL);
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// 临时尺寸；RecalcLayoutAndResize 会在创建后调整
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CRect rc(anchor.x, anchor.y, anchor.x + 400, anchor.y + 200);
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// 样式选择：
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// 单发 tooltip —— WS_POPUP|WS_BORDER + EX_TOPMOST|TOOLWINDOW|NOACTIVATE
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// （不激活、不上任务栏、置顶；光标移开会被主对话框关掉）
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// 循环监视窗口 —— WS_OVERLAPPEDWINDOW （标题栏 / 系统菜单 / 最大化 / 最小化 / 可调整边框）
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// + WS_EX_APPWINDOW（强制独立任务栏图标，便于多窗口切换）
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DWORD style = loopMode ? (WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN)
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: (WS_POPUP | WS_BORDER);
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DWORD styleEx = loopMode ? WS_EX_APPWINDOW
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: (WS_EX_TOPMOST | WS_EX_TOOLWINDOW | WS_EX_NOACTIVATE);
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// 单发模式下窗口文本无意义（无标题栏可显示）；循环模式下用宽字符 SetWindowTextW 显式设。
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BOOL bOk = CWnd::CreateEx(styleEx, kClass, _T(""), style, rc, pParent, 0);
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if (!bOk) return FALSE;
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if (loopMode && !windowTitle.IsEmpty()) {
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::SetWindowTextW(GetSafeHwnd(), windowTitle);
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}
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// 循环模式：给窗口装上眼睛图标（标题栏 + 任务栏 + Alt-Tab）。
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// ICO 资源里包含 16x16 与 32x32 两份，ICON_SMALL/ICON_BIG 各取最佳尺寸。
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// HICON 由本类持有，析构时 DestroyIcon（WM_SETICON 不转移所有权）。
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if (loopMode) {
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m_hIconSmall = (HICON)::LoadImage(AfxGetInstanceHandle(),
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MAKEINTRESOURCE(IDI_ICON_SNAPSHOT), IMAGE_ICON,
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::GetSystemMetrics(SM_CXSMICON), ::GetSystemMetrics(SM_CYSMICON),
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LR_DEFAULTCOLOR);
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m_hIconBig = (HICON)::LoadImage(AfxGetInstanceHandle(),
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MAKEINTRESOURCE(IDI_ICON_SNAPSHOT), IMAGE_ICON,
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::GetSystemMetrics(SM_CXICON), ::GetSystemMetrics(SM_CYICON),
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LR_DEFAULTCOLOR);
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if (m_hIconSmall) SendMessage(WM_SETICON, ICON_SMALL, (LPARAM)m_hIconSmall);
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if (m_hIconBig) SendMessage(WM_SETICON, ICON_BIG, (LPARAM)m_hIconBig);
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}
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RecalcLayoutAndResize();
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// 单发：不激活；循环：正常显示，允许接收焦点（系统菜单 / 拖拽 / 最小化都需要可激活）
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ShowWindow(loopMode ? SW_SHOWNORMAL : SW_SHOWNOACTIVATE);
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if (loopMode) {
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// 任务栏图标 + 标题在多窗口情况下立刻可见
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UpdateWindow();
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}
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return TRUE;
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}
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void CPreviewTipWnd::SetImageFromJpeg(const BYTE* data, size_t bytes)
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{
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if (!data || bytes == 0) return;
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HGLOBAL hMem = ::GlobalAlloc(GMEM_MOVEABLE, bytes);
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if (!hMem) return;
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void* p = ::GlobalLock(hMem);
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if (!p) { ::GlobalFree(hMem); return; }
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memcpy(p, data, bytes);
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::GlobalUnlock(hMem);
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IStream* stream = nullptr;
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if (FAILED(::CreateStreamOnHGlobal(hMem, TRUE, &stream))) {
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::GlobalFree(hMem);
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return;
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}
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std::unique_ptr<Bitmap> bmp(new Bitmap(stream, FALSE));
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stream->Release(); // CreateStreamOnHGlobal(..., TRUE) 释放 stream 时会释放 hMem
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if (!bmp || bmp->GetLastStatus() != Ok) {
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return;
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}
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m_image = std::move(bmp);
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m_hasImage = true;
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m_unavailable = false;
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// 循环模式下窗口尺寸交给用户控制（OnSize / WS_THICKFRAME），后续帧不再自动重排版，
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// 只 Invalidate 触发重绘；图像在 OnPaint 中按 client rect 等比例适配。
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if (!m_loopMode) {
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RecalcLayoutAndResize();
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}
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if (GetSafeHwnd()) Invalidate();
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}
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void CPreviewTipWnd::MarkPreviewUnavailable()
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{
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if (m_hasImage) return; // 已经有图就不再覆盖
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m_unavailable = true;
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if (GetSafeHwnd()) Invalidate();
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}
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void CPreviewTipWnd::SetLoopOwner(HWND ownerHwnd, UINT msgId, uint64_t clientId)
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{
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// 仅更新回调订阅；m_loopMode 由 Create() 一次性设定，不在这里改 —— 否则
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// CloseLoopTip 用 SetLoopOwner(NULL,0,0) 解订阅时会顺手把 loopMode 翻成 false，
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// 导致 PostNcDestroy 跳过 delete this → 每关一次循环窗口泄漏一个对象。
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m_loopOwner = ownerHwnd;
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m_loopMsg = msgId;
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m_clientId = clientId;
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}
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void CPreviewTipWnd::OnDestroy()
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{
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// 在窗口实际销毁前回告 owner（仅循环模式）。owner 据此从映射表擦掉本条目。
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// 注意：把字段先置零，避免极端情况下被 PostNcDestroy 再触发一次。
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if (m_loopMode && m_loopOwner && ::IsWindow(m_loopOwner) && m_loopMsg != 0) {
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HWND owner = m_loopOwner;
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UINT msg = m_loopMsg;
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m_loopOwner = nullptr;
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m_loopMsg = 0;
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// 64 位 clientId 用 LPARAM 指针传递；WPARAM 在 32 位 Windows 不够宽。
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auto* pId = new uint64_t(m_clientId);
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if (!::PostMessageA(owner, msg, 0, (LPARAM)pId)) {
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delete pId;
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}
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}
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CWnd::OnDestroy();
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}
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void CPreviewTipWnd::PostNcDestroy()
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{
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// 仅循环模式自管理生命周期；单次提示窗口由主对话框 SAFE_DELETE 释放。
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bool selfDelete = m_loopMode;
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CWnd::PostNcDestroy();
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if (selfDelete) {
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delete this;
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}
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}
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void CPreviewTipWnd::RecalcLayoutAndResize()
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{
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HWND hWnd = GetSafeHwnd();
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if (!hWnd) return;
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// 估算图像尺寸（先算图像，因为文本宽度要参考图像宽度对齐）
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if (m_image) {
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int iw = (int)m_image->GetWidth();
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int ih = (int)m_image->GetHeight();
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if (iw > MAX_IMAGE_W) {
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ih = (int)((double)ih * MAX_IMAGE_W / iw + 0.5);
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iw = MAX_IMAGE_W;
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}
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m_imageDrawW = iw;
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m_imageDrawH = ih;
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} else {
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m_imageDrawW = m_imageReserveW;
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m_imageDrawH = m_imageReserveH;
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}
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// 文本换行宽度：与图像同宽（让文本视觉上对齐到图像下方），但不超过 MAX_TEXT_W
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// 没有图像时退化到 MAX_TEXT_W
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int textWrapW = m_imageDrawW > 0 ? min((int)MAX_TEXT_W, m_imageDrawW) : (int)MAX_TEXT_W;
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if (textWrapW < MIN_TEXT_W) textWrapW = MIN_TEXT_W;
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// 估算文本尺寸（项目是 MBCS，但浮窗文本是宽字符，必须显式调用 W 版本）
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CClientDC dc(this);
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CFont* old = dc.SelectObject(&m_font);
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CRect rcText(0, 0, textWrapW, 32767);
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::DrawTextW(dc.GetSafeHdc(), m_text, m_text.GetLength(), &rcText,
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DT_CALCRECT | DT_LEFT | DT_WORDBREAK | DT_NOPREFIX);
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m_textW = max((int)MIN_TEXT_W, rcText.Width());
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if (m_imageDrawW > 0) m_textW = max(m_textW, m_imageDrawW); // 至少与图像同宽
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m_textH = rcText.Height();
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dc.SelectObject(old);
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int contentW = max(m_imageDrawW, m_textW);
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int gap = (m_imageDrawW > 0 && m_textH > 0) ? IMAGE_TEXT_GAP : 0;
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int totalW = PADDING + contentW + PADDING;
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int totalH = PADDING + m_imageDrawH + gap + m_textH + PADDING;
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// 当前左上角
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CRect rc;
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GetWindowRect(&rc);
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int newX = rc.left;
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int newY = rc.top;
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// 防止越出屏幕：右下夹紧到工作区
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HMONITOR hMon = MonitorFromPoint(CPoint(newX, newY), MONITOR_DEFAULTTONEAREST);
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MONITORINFO mi = { sizeof(mi) };
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if (hMon && GetMonitorInfo(hMon, &mi)) {
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if (newX + totalW > mi.rcWork.right) newX = max((int)mi.rcWork.left, mi.rcWork.right - totalW);
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if (newY + totalH > mi.rcWork.bottom) newY = max((int)mi.rcWork.top, mi.rcWork.bottom - totalH);
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}
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SetWindowPos(NULL, newX, newY, totalW, totalH, SWP_NOZORDER | SWP_NOACTIVATE);
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}
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BOOL CPreviewTipWnd::OnEraseBkgnd(CDC* /*pDC*/)
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{
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return TRUE; // 在 OnPaint 里整体填充
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}
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void CPreviewTipWnd::OnPaint()
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{
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CPaintDC pdc(this);
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CRect rcClient;
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GetClientRect(&rcClient);
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if (rcClient.IsRectEmpty()) return;
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// 双缓冲
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CDC memDC;
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memDC.CreateCompatibleDC(&pdc);
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CBitmap memBmp;
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memBmp.CreateCompatibleBitmap(&pdc, rcClient.Width(), rcClient.Height());
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CBitmap* oldBmp = memDC.SelectObject(&memBmp);
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// 单发 tooltip 用 COLOR_INFOBK（系统提示底色）；循环窗口用 COLOR_BTNFACE（普通窗口背景）
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COLORREF bg = m_loopMode ? ::GetSysColor(COLOR_BTNFACE) : ::GetSysColor(COLOR_INFOBK);
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memDC.FillSolidRect(&rcClient, bg);
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CFont* oldFont = memDC.SelectObject(&m_font);
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memDC.SetTextColor(::GetSysColor(m_loopMode ? COLOR_WINDOWTEXT : COLOR_INFOTEXT));
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memDC.SetBkMode(TRANSPARENT);
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if (m_loopMode) {
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// 循环模式：基于 client rect 动态分配；图像区按 client 大小自适应，文本固定在底部
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CRect rcImg, rcText;
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LayoutForLoopMode(rcClient, rcImg, rcText);
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if (!rcImg.IsRectEmpty()) DrawImageArea(memDC, rcImg);
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if (!rcText.IsRectEmpty()) DrawTextArea(memDC, rcText);
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} else {
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// 单发 tooltip：保持原行为，按 RecalcLayoutAndResize 算好的固定尺寸排版
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int curY = PADDING;
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if (m_imageDrawW > 0 && m_imageDrawH > 0) {
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CRect rcImg(PADDING, curY, PADDING + m_imageDrawW, curY + m_imageDrawH);
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DrawImageArea(memDC, rcImg);
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curY += m_imageDrawH + IMAGE_TEXT_GAP;
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}
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CRect rcText(PADDING, curY, PADDING + m_textW, curY + m_textH);
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DrawTextArea(memDC, rcText);
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}
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memDC.SelectObject(oldFont);
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pdc.BitBlt(0, 0, rcClient.Width(), rcClient.Height(), &memDC, 0, 0, SRCCOPY);
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memDC.SelectObject(oldBmp);
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}
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void CPreviewTipWnd::LayoutForLoopMode(const CRect& client, CRect& outImg, CRect& outText)
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{
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outImg.SetRectEmpty();
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outText.SetRectEmpty();
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int innerW = client.Width() - 2 * PADDING;
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if (innerW < 50) return; // 太窄，啥也别画，避免计算崩溃
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// 计算文本以当前可用宽度换行后的高度（用一份临时 DC）
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int textH = 0;
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{
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CClientDC dc(this);
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CFont* old = dc.SelectObject(&m_font);
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CRect rcCalc(0, 0, innerW, 32767);
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::DrawTextW(dc.GetSafeHdc(), m_text, m_text.GetLength(), &rcCalc,
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DT_CALCRECT | DT_LEFT | DT_WORDBREAK | DT_NOPREFIX);
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textH = rcCalc.Height();
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dc.SelectObject(old);
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}
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// 文本固定在底部
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outText.SetRect(client.left + PADDING,
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client.bottom - PADDING - textH,
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client.right - PADDING,
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client.bottom - PADDING);
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// 图像区占顶部剩余空间
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outImg.SetRect(client.left + PADDING,
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client.top + PADDING,
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client.right - PADDING,
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outText.top - IMAGE_TEXT_GAP);
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// 高度不足以放图像（被压扁）→ 只画文本
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if (outImg.Height() < 60) {
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outImg.SetRectEmpty();
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// 文本提到中间，避免压在底部边缘
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outText.MoveToY(client.top + PADDING);
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}
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}
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void CPreviewTipWnd::DrawImageArea(CDC& dc, const CRect& rc)
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{
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if (rc.IsRectEmpty()) return;
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// 边框
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dc.Draw3dRect(&rc, ::GetSysColor(COLOR_3DSHADOW), ::GetSysColor(COLOR_3DSHADOW));
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CRect rcInner = rc;
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rcInner.DeflateRect(1, 1);
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if (m_hasImage && m_image) {
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if (m_loopMode) {
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// 循环模式：保留长宽比适配 rect，黑色背景充当 letterbox 留白
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dc.FillSolidRect(&rcInner, RGB(32, 32, 32));
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double imgW = (double)m_image->GetWidth();
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double imgH = (double)m_image->GetHeight();
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if (imgW > 0 && imgH > 0 && rcInner.Width() > 0 && rcInner.Height() > 0) {
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double sx = rcInner.Width() / imgW;
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double sy = rcInner.Height() / imgH;
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double scale = sx < sy ? sx : sy;
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int drawW = (int)(imgW * scale + 0.5);
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int drawH = (int)(imgH * scale + 0.5);
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int x = rcInner.left + (rcInner.Width() - drawW) / 2;
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int y = rcInner.top + (rcInner.Height() - drawH) / 2;
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Graphics g(dc.GetSafeHdc());
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g.SetInterpolationMode(InterpolationModeHighQualityBicubic);
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g.SetSmoothingMode(SmoothingModeHighQuality);
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g.DrawImage(m_image.get(), x, y, drawW, drawH);
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}
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} else {
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// 单发：与原行为一致，铺满 rc
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Graphics g(dc.GetSafeHdc());
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g.SetInterpolationMode(InterpolationModeHighQualityBicubic);
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g.SetSmoothingMode(SmoothingModeHighQuality);
|
||
g.DrawImage(m_image.get(), rc.left + 1, rc.top + 1, rc.Width() - 2, rc.Height() - 2);
|
||
}
|
||
} else {
|
||
// 占位灰色背景
|
||
dc.FillSolidRect(&rcInner, RGB(245, 245, 245));
|
||
|
||
const wchar_t* placeholder = m_unavailable ? L"Preview Unavailable" : L"Loading Preview ...";
|
||
UINT fmt = DT_CENTER | DT_VCENTER | DT_SINGLELINE | DT_NOPREFIX;
|
||
dc.SetTextColor(m_unavailable ? RGB(160, 80, 80) : RGB(120, 120, 120));
|
||
RECT rcInnerRaw = rcInner;
|
||
::DrawTextW(dc.GetSafeHdc(), placeholder, -1, &rcInnerRaw, fmt);
|
||
dc.SetTextColor(::GetSysColor(m_loopMode ? COLOR_WINDOWTEXT : COLOR_INFOTEXT));
|
||
}
|
||
}
|
||
|
||
void CPreviewTipWnd::OnSize(UINT nType, int cx, int cy)
|
||
{
|
||
CWnd::OnSize(nType, cx, cy);
|
||
if (m_loopMode && GetSafeHwnd()) {
|
||
// 循环模式：所有排版交给 OnPaint 读取 client rect，重画即可
|
||
Invalidate();
|
||
}
|
||
}
|
||
|
||
void CPreviewTipWnd::OnGetMinMaxInfo(MINMAXINFO* lpMMI)
|
||
{
|
||
if (m_loopMode && lpMMI) {
|
||
// 防止用户把窗口拽到肉眼不可见。240x200 大致能保证标题栏 + 一行文本 + 缩略图可见。
|
||
lpMMI->ptMinTrackSize.x = 240;
|
||
lpMMI->ptMinTrackSize.y = 200;
|
||
}
|
||
CWnd::OnGetMinMaxInfo(lpMMI);
|
||
}
|
||
|
||
void CPreviewTipWnd::DrawTextArea(CDC& dc, const CRect& rc)
|
||
{
|
||
RECT r = rc;
|
||
::DrawTextW(dc.GetSafeHdc(), m_text, m_text.GetLength(), &r,
|
||
DT_LEFT | DT_TOP | DT_WORDBREAK | DT_NOPREFIX);
|
||
}
|