git.distorted.org.uk Git - u/mdw/putty/blob - sizetip.c

   1 #include <windows.h>
   2 #ifndef AUTO_WINSOCK
   3 #ifdef WINSOCK_TWO
   4 #include <winsock2.h>
   5 #else
   6 #include <winsock.h>
   7 #endif
   8 #endif
   9 #include <winreg.h>
  10 #include <tchar.h>
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13
  14 #include "putty.h"
  15
  16 static ATOM tip_class = 0;
  17
  18 static HFONT tip_font;
  19 static COLORREF tip_bg;
  20 static COLORREF tip_text;
  21
  22 static LRESULT CALLBACK SizeTipWndProc(HWND hWnd, UINT nMsg,
  23                                        WPARAM wParam, LPARAM lParam)
  24 {
  25
  26     switch (nMsg) {
  27       case WM_ERASEBKGND:
  28         return TRUE;
  29
  30       case WM_PAINT:
  31         {
  32             HBRUSH hbr;
  33             HGDIOBJ holdbr;
  34             RECT cr;
  35             int wtlen;
  36             LPTSTR wt;
  37             HDC hdc;
  38
  39             PAINTSTRUCT ps;
  40             hdc = BeginPaint(hWnd, &ps);
  41
  42             SelectObject(hdc, tip_font);
  43             SelectObject(hdc, GetStockObject(BLACK_PEN));
  44
  45             hbr = CreateSolidBrush(tip_bg);
  46             holdbr = SelectObject(hdc, hbr);
  47
  48             GetClientRect(hWnd, &cr);
  49             Rectangle(hdc, cr.left, cr.top, cr.right, cr.bottom);
  50
  51             wtlen = GetWindowTextLength(hWnd);
  52             wt = (LPTSTR)malloc((wtlen+1)*sizeof(TCHAR));
  53             GetWindowText(hWnd, wt, wtlen+1);
  54
  55             SetTextColor(hdc, tip_text);
  56             SetBkColor(hdc, tip_bg);
  57
  58             TextOut(hdc, cr.left+3, cr.top+3, wt, wtlen);
  59
  60             free(wt);
  61
  62             SelectObject(hdc, holdbr);
  63             DeleteObject(hbr);
  64
  65             EndPaint(hWnd, &ps);
  66         }
  67         return 0;
  68
  69       case WM_NCHITTEST:
  70         return HTTRANSPARENT;
  71
  72       case WM_DESTROY:
  73         DeleteObject(tip_font);
  74         tip_font = NULL;
  75         break;
  76
  77       case WM_SETTEXT:
  78         {
  79             LPCTSTR str = (LPCTSTR)lParam;
  80             SIZE sz;
  81             HDC hdc = CreateCompatibleDC(NULL);
  82
  83             SelectObject(hdc, tip_font);
  84             GetTextExtentPoint32(hdc, str, _tcslen(str), &sz);
  85
  86             SetWindowPos(hWnd, NULL, 0, 0, sz.cx+6, sz.cy+6, SWP_NOZORDER|SWP_NOMOVE|SWP_NOACTIVATE);
  87             InvalidateRect(hWnd, NULL, FALSE);
  88
  89             DeleteDC(hdc);
  90         }
  91         break;
  92     }
  93
  94     return DefWindowProc(hWnd, nMsg, wParam, lParam);
  95 }
  96
  97 static HWND tip_wnd = NULL;
  98 static int tip_enabled = 0;
  99
 100 void UpdateSizeTip(HWND src, int cx, int cy)
 101 {
 102     TCHAR str[32];
 103
 104     if (!tip_enabled) return;
 105
 106     if (!tip_wnd) {
 107         NONCLIENTMETRICS nci;
 108
 109         /* First make sure the window class is registered */
 110
 111         if (!tip_class) {
 112             WNDCLASS wc;
 113             wc.style = CS_HREDRAW|CS_VREDRAW;
 114             wc.lpfnWndProc = SizeTipWndProc;
 115             wc.cbClsExtra = 0;
 116             wc.cbWndExtra = 0;
 117             wc.hInstance = putty_inst;
 118             wc.hIcon = NULL;
 119             wc.hCursor = NULL;
 120             wc.hbrBackground = NULL;
 121             wc.lpszMenuName = NULL;
 122             wc.lpszClassName = "SizeTipClass";
 123
 124             tip_class = RegisterClass(&wc);
 125         }
 126
 127 #if 0
 128         /* Default values based on Windows Standard color scheme */
 129
 130         tip_font = GetStockObject(SYSTEM_FONT);
 131         tip_bg = RGB(255, 255, 225);
 132         tip_text = RGB(0, 0, 0);
 133 #endif
 134
 135         /* Prepare other GDI objects and drawing info */
 136
 137         tip_bg = GetSysColor(COLOR_INFOBK);
 138         tip_text = GetSysColor(COLOR_INFOTEXT);
 139
 140         memset(&nci, 0, sizeof(NONCLIENTMETRICS));
 141         nci.cbSize = sizeof(NONCLIENTMETRICS);
 142         SystemParametersInfo(SPI_GETNONCLIENTMETRICS, sizeof(NONCLIENTMETRICS), &nci, 0);
 143         tip_font = CreateFontIndirect(&nci.lfStatusFont);
 144     }
 145
 146     /* Generate the tip text */
 147
 148     sprintf(str, "%dx%d", cx, cy);
 149
 150     if (!tip_wnd) {
 151         HDC hdc;
 152         SIZE sz;
 153         RECT wr;
 154         int ix, iy;
 155
 156         /* calculate the tip's size */
 157
 158         hdc = CreateCompatibleDC(NULL);
 159         GetTextExtentPoint32(hdc, str, _tcslen(str), &sz);
 160         DeleteDC(hdc);
 161
 162         GetWindowRect(src, &wr);
 163
 164         ix = wr.left;
 165         if (ix<16) ix = 16;
 166
 167         iy = wr.top - sz.cy;
 168         if (iy<16) iy = 16;
 169
 170         /* Create the tip window */
 171
 172         tip_wnd = CreateWindowEx(WS_EX_TOOLWINDOW|WS_EX_TOPMOST, MAKEINTRESOURCE(tip_class), str, WS_POPUP,
 173                                  ix, iy, sz.cx, sz.cy,
 174                                  NULL, NULL, putty_inst, NULL);
 175
 176         ShowWindow(tip_wnd, SW_SHOWNOACTIVATE);
 177
 178     } else {
 179
 180         /* Tip already exists, just set the text */
 181
 182         SetWindowText(tip_wnd, str);
 183     }
 184 }
 185
 186 void EnableSizeTip(int bEnable)
 187 {
 188     if (tip_wnd && !bEnable) {
 189         DestroyWindow(tip_wnd);
 190         tip_wnd = NULL;
 191     }
 192
 193     tip_enabled = bEnable;
 194 }