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https://github.com/Blinue/Magpie.git
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242 lines
7 KiB
C++
242 lines
7 KiB
C++
#include "pch.h"
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#include "CursorWindow.h"
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static wil::unique_hcursor CreateCursorFromBitmaps(HBITMAP hColorBitmap, HBITMAP hMaskBitmap) noexcept {
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ICONINFO iconInfo = {
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.fIcon = FALSE,
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.xHotspot = 0,
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.yHotspot = 0,
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.hbmMask = hMaskBitmap,
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.hbmColor = hColorBitmap
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};
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return wil::unique_hcursor(CreateIconIndirect(&iconInfo));
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}
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static wil::unique_hcursor CreateColorCursor() noexcept {
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const uint32_t width = (uint32_t)GetSystemMetrics(SM_CXCURSOR);
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const uint32_t height = (uint32_t)GetSystemMetrics(SM_CYCURSOR);
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// 颜色位图初始化为半透明红色
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std::vector<uint32_t> colorBits(width * height, 0x80FF0000);
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wil::unique_hbitmap hColorBitmap(CreateBitmap(width, height, 1, 32, colorBits.data()));
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// 仍需要遮罩位图，不过既然颜色位图有透明通道，遮罩位图不会被使用，因此无需初始化
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wil::unique_hbitmap hMaskBitmap(CreateBitmap(width, height, 1, 1, nullptr));
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return CreateCursorFromBitmaps(hColorBitmap.get(), hMaskBitmap.get());
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}
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static wil::unique_hcursor CreateMonochromeCursor() noexcept {
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const uint32_t width = (uint32_t)GetSystemMetrics(SM_CXCURSOR);
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const uint32_t height = (uint32_t)GetSystemMetrics(SM_CYCURSOR);
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// width 必定是 16 的倍数，因此遮罩位图每行都已按 WORD 对齐
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assert(width % 16 == 0);
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const uint32_t widthByteCount = width / 8;
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// 单色光标无颜色位图，遮罩位图高度是光标高度的两倍
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const uint32_t bitmapHeight = height * 2;
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// 分为四个部分：
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// 左上：白色 (AND=0, XOR=1)
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// 右上：黑色 (AND=0, XOR=0)
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// 左下：反色 (AND=1, XOR=1)
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// 右下：透明 (AND=1, XOR=0)
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assert(width % 16 == 0);
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std::vector<uint8_t> maskBits(widthByteCount * bitmapHeight);
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// AND 遮罩下半置 1
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for (uint32_t y = height / 2; y < height; ++y) {
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for (uint32_t x = 0; x < width; ++x) {
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uint32_t byteIdx = y * widthByteCount + x / 8;
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uint32_t bitIdx = 7 - (x % 8);
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maskBits[byteIdx] |= 1 << bitIdx;
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}
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}
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// XOR 遮罩左半置 1
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for (uint32_t y = height; y < bitmapHeight; ++y) {
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for (uint32_t x = 0; x < width / 2; ++x) {
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uint32_t byteIdx = y * widthByteCount + x / 8;
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uint32_t bitIdx = 7 - (x % 8);
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maskBits[byteIdx] |= 1 << bitIdx;
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}
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}
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wil::unique_hbitmap hMaskBitmap(CreateBitmap(width, bitmapHeight, 1, 1, maskBits.data()));
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return CreateCursorFromBitmaps(NULL, hMaskBitmap.get());
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}
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static wil::unique_hcursor CreateMaskedColorCursor() noexcept {
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const uint32_t width = (uint32_t)GetSystemMetrics(SM_CXCURSOR);
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const uint32_t height = (uint32_t)GetSystemMetrics(SM_CYCURSOR);
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// width 必定是 16 的倍数，因此遮罩位图每行都已按 WORD 对齐
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assert(width % 16 == 0);
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const uint32_t widthByteCount = width / 8;
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// 分为两个部分：
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// 左半：红色 (COLOR=0x00FF0000, MASK=0)
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// 右半：和红色 XOR (COLOR=0x00FF0000, MASK=1)
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// 颜色位图初始化为红色。注意透明通道为 0，否则会被识别为彩色光标
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std::vector<uint32_t> colorBits(width * height, 0x00FF0000);
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std::vector<uint8_t> maskBits(widthByteCount * height, 0);
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// XOR 遮罩右半置 1
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for (uint32_t y = 0; y < height; ++y) {
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for (uint32_t x = width / 2; x < width; ++x) {
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uint32_t byteIdx = y * widthByteCount + x / 8;
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uint32_t bitIdx = 7 - (x % 8);
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maskBits[byteIdx] |= 1 << bitIdx;
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}
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}
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wil::unique_hbitmap hColorBitmap(CreateBitmap(width, height, 1, 32, colorBits.data()));
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wil::unique_hbitmap hMaskBitmap(CreateBitmap(width, height, 1, 1, maskBits.data()));
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return CreateCursorFromBitmaps(hColorBitmap.get(), hMaskBitmap.get());
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}
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bool CursorWindow::Create() noexcept {
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static const wchar_t* WINDOW_NAME = L"CursorWindow";
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_hCursor = CreateColorCursor();
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WNDCLASSEXW wcex = {
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.cbSize = sizeof(WNDCLASSEX),
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.style = CS_HREDRAW | CS_VREDRAW,
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.lpfnWndProc = _WndProc,
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.hInstance = wil::GetModuleInstanceHandle(),
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.lpszClassName = WINDOW_NAME
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};
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if (!RegisterClassEx(&wcex)) {
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return false;
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}
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CreateWindow(
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WINDOW_NAME,
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WINDOW_NAME,
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WS_OVERLAPPEDWINDOW,
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CW_USEDEFAULT,
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CW_USEDEFAULT,
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CW_USEDEFAULT,
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CW_USEDEFAULT,
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NULL,
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NULL,
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wil::GetModuleInstanceHandle(),
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this
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);
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if (!Handle()) {
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return false;
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}
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const double dpiScale = _DpiScale();
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SetWindowPos(Handle(), NULL, 0, 0,
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std::lround(500 * dpiScale), std::lround(400 * dpiScale),
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SWP_NOMOVE | SWP_SHOWWINDOW);
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return true;
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}
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LRESULT CursorWindow::_MessageHandler(UINT msg, WPARAM wParam, LPARAM lParam) noexcept {
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switch (msg) {
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case WM_CREATE:
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{
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const LRESULT ret = base_type::_MessageHandler(msg, wParam, lParam);
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const HMODULE hInst = wil::GetModuleInstanceHandle();
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_hwndBtn1 = CreateWindow(L"BUTTON", L"彩色光标",
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WS_CHILD | WS_VISIBLE, 0, 0, 0, 0, Handle(), (HMENU)1, hInst, 0);
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_hwndBtn2 = CreateWindow(L"BUTTON", L"单色光标",
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WS_CHILD | WS_VISIBLE, 0, 0, 0, 0, Handle(), (HMENU)2, hInst, 0);
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_hwndBtn3 = CreateWindow(L"BUTTON", L"彩色掩码光标",
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WS_CHILD | WS_VISIBLE, 0, 0, 0, 0, Handle(), (HMENU)3, hInst, 0);
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_UpdateButtonPos();
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SendMessage(_hwndBtn1, WM_SETFONT, (WPARAM)_UIFont(), TRUE);
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SendMessage(_hwndBtn2, WM_SETFONT, (WPARAM)_UIFont(), TRUE);
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SendMessage(_hwndBtn3, WM_SETFONT, (WPARAM)_UIFont(), TRUE);
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return ret;
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}
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case WM_COMMAND:
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{
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if (HIWORD(wParam) == BN_CLICKED) {
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const WORD btnId = LOWORD(wParam);
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if (btnId == 1) {
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_hCursor = CreateColorCursor();
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} else if (btnId == 2) {
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_hCursor = CreateMonochromeCursor();
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} else {
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_hCursor = CreateMaskedColorCursor();
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}
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return 0;
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}
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break;
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}
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case WM_SIZE:
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{
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_UpdateButtonPos();
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break;
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}
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case WM_SETCURSOR:
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{
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if (LOWORD(lParam) == HTCLIENT) {
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SetCursor(_hCursor.get());
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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_ERASEBKGND:
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{
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// 绘制渐变背景
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wil::unique_hdc_paint hdc = wil::BeginPaint(Handle());
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RECT rc;
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GetClientRect(Handle(), &rc);
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TRIVERTEX vertices[] = {
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{
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.x = rc.left,
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.y = rc.top,
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.Red = 0xE000,
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.Green = 0x6000,
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.Blue = 0xE000
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},
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{
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.x = rc.right,
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.y = rc.bottom,
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.Red = 0x6000,
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.Green = 0xE000,
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.Blue = 0x6000
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}
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};
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GRADIENT_RECT rect = { 0, 1 };
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GradientFill(hdc.get(), vertices, 2, &rect, 1, GRADIENT_FILL_RECT_V);
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return TRUE;
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}
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case WM_DESTROY:
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PostQuitMessage(0);
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break;
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}
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return base_type::_MessageHandler(msg, wParam, lParam);
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}
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void CursorWindow::_UpdateButtonPos() noexcept {
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RECT clientRect;
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GetClientRect(Handle(), &clientRect);
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const double dpiScale = _DpiScale();
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const SIZE btnSize = { std::lround(160 * dpiScale),std::lround(40 * dpiScale) };
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const LONG spacing = std::lround(8 * dpiScale);
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const LONG btnLeft = ((clientRect.right - clientRect.left) - btnSize.cx) / 2;
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const LONG windowCenterY = (clientRect.bottom - clientRect.top) / 2;
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SetWindowPos(_hwndBtn1, NULL, btnLeft, windowCenterY - 3 * btnSize.cy / 2 - spacing,
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btnSize.cx, btnSize.cy, SWP_NOACTIVATE);
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SetWindowPos(_hwndBtn2, NULL, btnLeft, windowCenterY - btnSize.cy / 2,
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btnSize.cx, btnSize.cy, SWP_NOACTIVATE);
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SetWindowPos(_hwndBtn3, NULL, btnLeft, windowCenterY + btnSize.cy / 2 + spacing,
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btnSize.cx, btnSize.cy, SWP_NOACTIVATE);
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}
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