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