DWinProgramming /Samples/Chap05/DevCaps1/DevCaps1.d

Language D Lines 191
MD5 Hash a74e66dcca91ad4a7dc6e71ea0a138c2
Repository git://github.com/AndrejMitrovic/DWinProgramming.git View Raw File View Project SPDX
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
/+
 + Copyright (c) Charles Petzold, 1998.
 + Ported to the D Programming Language by Andrej Mitrovic, 2011.
 +/

module DevCaps1;

import core.runtime;
import std.algorithm : min, max;
import std.conv;
import std.math;
import std.string;
import std.utf : count, toUTFz;

auto toUTF16z(S)(S s)
{
    return toUTFz!(const(wchar)*)(s);
}

pragma(lib, "gdi32.lib");
pragma(lib, "winmm.lib");
import win32.mmsystem;
import win32.windef;
import win32.winuser;
import win32.wingdi;

struct DeviceCaps
{
    int    index;
    string label;
    string desc;
}

enum devCaps =
[
    DeviceCaps(HORZSIZE,     "HORZSIZE",     "Width in millimeters:"),
    DeviceCaps(VERTSIZE,     "VERTSIZE",     "Height in millimeters:"),
    DeviceCaps(HORZRES,      "HORZRES",      "Width in pixels:"),
    DeviceCaps(VERTRES,      "VERTRES",      "Height in raster lines:"),
    DeviceCaps(BITSPIXEL,    "BITSPIXEL",    "Color bits per pixel:"),
    DeviceCaps(PLANES,       "PLANES",       "Number of color planes:"),
    DeviceCaps(NUMBRUSHES,   "NUMBRUSHES",   "Number of device brushes:"),
    DeviceCaps(NUMPENS,      "NUMPENS",      "Number of device pens:"),
    DeviceCaps(NUMMARKERS,   "NUMMARKERS",   "Number of device markers:"),
    DeviceCaps(NUMFONTS,     "NUMFONTS",     "Number of device fonts:"),
    DeviceCaps(NUMCOLORS,    "NUMCOLORS",    "Number of device colors:"),
    DeviceCaps(PDEVICESIZE,  "PDEVICESIZE",  "Size of device structure:"),
    DeviceCaps(ASPECTX,      "ASPECTX",      "Relative width of pixel:"),
    DeviceCaps(ASPECTY,      "ASPECTY",      "Relative height of pixel:"),
    DeviceCaps(ASPECTXY,     "ASPECTXY",     "Relative diagonal of pixel:"),
    DeviceCaps(LOGPIXELSX,   "LOGPIXELSX",   "Horizontal dots per inch:"),
    DeviceCaps(LOGPIXELSY,   "LOGPIXELSY",   "Vertical dots per inch:"),
    DeviceCaps(SIZEPALETTE,  "SIZEPALETTE",  "Number of palette entries:"),
    DeviceCaps(NUMRESERVED,  "NUMRESERVED",  "Reserved palette entries:"),
    DeviceCaps(COLORRES,     "COLORRES",     "Actual color resolution:")
];

extern (Windows)
int WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int iCmdShow)
{
    int result;
    void exceptionHandler(Throwable e) { throw e; }

    try
    {
        Runtime.initialize(&exceptionHandler);
        result = myWinMain(hInstance, hPrevInstance, lpCmdLine, iCmdShow);
        Runtime.terminate(&exceptionHandler);
    }
    catch (Throwable o)
    {
        MessageBox(null, o.toString().toUTF16z, "Error", MB_OK | MB_ICONEXCLAMATION);
        result = 0;
    }

    return result;
}

int myWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int iCmdShow)
{
    string appName = "DevCaps1";

    HWND hwnd;
    MSG  msg;
    WNDCLASS wndclass;

    wndclass.style         = CS_HREDRAW | CS_VREDRAW;
    wndclass.lpfnWndProc   = &WndProc;
    wndclass.cbClsExtra    = 0;
    wndclass.cbWndExtra    = 0;
    wndclass.hInstance     = hInstance;
    wndclass.hIcon         = LoadIcon(NULL, IDI_APPLICATION);
    wndclass.hCursor       = LoadCursor(NULL, IDC_ARROW);
    wndclass.hbrBackground = cast(HBRUSH)GetStockObject(WHITE_BRUSH);
    wndclass.lpszMenuName  = NULL;
    wndclass.lpszClassName = appName.toUTF16z;

    if(!RegisterClass(&wndclass))
    {
        MessageBox(NULL, "This program requires Windows NT!", appName.toUTF16z, MB_ICONERROR);
        return 0;
    }

    hwnd = CreateWindow(appName.toUTF16z,       // window class name
                        "Device Capabilities",  // window caption
                        WS_OVERLAPPEDWINDOW,    // window style
                        CW_USEDEFAULT,          // initial x position
                        CW_USEDEFAULT,          // initial y position
                        CW_USEDEFAULT,          // initial x size
                        CW_USEDEFAULT,          // initial y size
                        NULL,                   // parent window handle
                        NULL,                   // window menu handle
                        hInstance,              // program instance handle
                        NULL);                  // creation parameters

    ShowWindow(hwnd, iCmdShow);
    UpdateWindow(hwnd);

    while(GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return msg.wParam;
}

extern(Windows)
LRESULT WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    static int cxChar, cxCaps, cyChar, cxClient, cyClient, iMaxWidth;
    HDC hdc;
    int x, y, iVertPos, iHorzPos, iPaintStart, iPaintEnd;
    PAINTSTRUCT ps;
    SCROLLINFO  si;
    TEXTMETRIC tm;

    switch(message)
    {
        case WM_CREATE:
        {
            hdc = GetDC(hwnd);
            scope(exit) ReleaseDC(hwnd, hdc);

            GetTextMetrics(hdc, &tm);
            cxChar = tm.tmAveCharWidth;
            cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2;
            cyChar = tm.tmHeight + tm.tmExternalLeading;

            // Save the width of the three columns
            iMaxWidth = 40 * cxChar + 22 * cxCaps;

            return 0;
        }

        case WM_SIZE:
        {
            cxClient = LOWORD(lParam);
            cyClient = HIWORD(lParam);
            return 0;
        }

        case WM_PAINT:
        {
            hdc = BeginPaint(hwnd, &ps);
            scope(exit) EndPaint(hwnd, &ps);

            foreach (index, caps; devCaps)
            {
                TextOut(hdc, 0, cyChar * index, caps.label.toUTF16z, caps.label.count);
                TextOut(hdc, 14 * cxCaps, cyChar * index, caps.desc.toUTF16z, caps.desc.count);
                SetTextAlign(hdc, TA_RIGHT | TA_TOP);

                auto value = format("%5s", GetDeviceCaps(hdc, caps.index));
                TextOut(hdc, 14 * cxCaps + 35 * cxChar, cyChar * index, value.toUTF16z, value.count);
                SetTextAlign(hdc, TA_LEFT | TA_TOP);
            }

            return 0;
        }

        case WM_DESTROY:
            PostQuitMessage(0);
            return 0;

        default:
    }

    return DefWindowProc(hwnd, message, wParam, lParam);
}
Back to Top