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

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