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