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 #include "winstuff.h"
  16
  17 static ATOM tip_class = 0;
  18
  19 static HFONT tip_font;
  20 static COLORREF tip_bg;
  21 static COLORREF tip_text;
  22
  23 static LRESULT CALLBACK SizeTipWndProc(HWND hWnd, UINT nMsg,
  24                                        WPARAM wParam, LPARAM lParam)
  25 {
  26
  27     switch (nMsg) {
  28       case WM_ERASEBKGND:
  29         return TRUE;
  30
  31       case WM_PAINT:
  32         {
  33             HBRUSH hbr;
  34             HGDIOBJ holdbr;
  35             RECT cr;
  36             int wtlen;
  37             LPTSTR wt;
  38             HDC hdc;
  39
  40             PAINTSTRUCT ps;
  41             hdc = BeginPaint(hWnd, &ps);
  42
  43             SelectObject(hdc, tip_font);
  44             SelectObject(hdc, GetStockObject(BLACK_PEN));
  45
  46             hbr = CreateSolidBrush(tip_bg);
  47             holdbr = SelectObject(hdc, hbr);
  48
  49             GetClientRect(hWnd, &cr);
  50             Rectangle(hdc, cr.left, cr.top, cr.right, cr.bottom);
  51
  52             wtlen = GetWindowTextLength(hWnd);
  53             wt = (LPTSTR)malloc((wtlen+1)*sizeof(TCHAR));
  54             GetWindowText(hWnd, wt, wtlen+1);
  55
  56             SetTextColor(hdc, tip_text);
  57             SetBkColor(hdc, tip_bg);
  58
  59             TextOut(hdc, cr.left+3, cr.top+3, wt, wtlen);
  60
  61             free(wt);
  62
  63             SelectObject(hdc, holdbr);
  64             DeleteObject(hbr);
  65
  66             EndPaint(hWnd, &ps);
  67         }
  68         return 0;
  69
  70       case WM_NCHITTEST:
  71         return HTTRANSPARENT;
  72
  73       case WM_DESTROY:
  74         DeleteObject(tip_font);
  75         tip_font = NULL;
  76         break;
  77
  78       case WM_SETTEXT:
  79         {
  80             LPCTSTR str = (LPCTSTR)lParam;
  81             SIZE sz;
  82             HDC hdc = CreateCompatibleDC(NULL);
  83
  84             SelectObject(hdc, tip_font);
  85             GetTextExtentPoint32(hdc, str, _tcslen(str), &sz);
  86
  87             SetWindowPos(hWnd, NULL, 0, 0, sz.cx+6, sz.cy+6, SWP_NOZORDER|SWP_NOMOVE|SWP_NOACTIVATE);
  88             InvalidateRect(hWnd, NULL, FALSE);
  89
  90             DeleteDC(hdc);
  91         }
  92         break;
  93     }
  94
  95     return DefWindowProc(hWnd, nMsg, wParam, lParam);
  96 }
  97
  98 static HWND tip_wnd = NULL;
  99 static int tip_enabled = 0;
 100
 101 void UpdateSizeTip(HWND src, int cx, int cy)
 102 {
 103     TCHAR str[32];
 104
 105     if (!tip_enabled) return;
 106
 107     if (!tip_wnd) {
 108         NONCLIENTMETRICS nci;
 109
 110         /* First make sure the window class is registered */
 111
 112         if (!tip_class) {
 113             WNDCLASS wc;
 114             wc.style = CS_HREDRAW|CS_VREDRAW;
 115             wc.lpfnWndProc = SizeTipWndProc;
 116             wc.cbClsExtra = 0;
 117             wc.cbWndExtra = 0;
 118             wc.hInstance = hinst;
 119             wc.hIcon = NULL;
 120             wc.hCursor = NULL;
 121             wc.hbrBackground = NULL;
 122             wc.lpszMenuName = NULL;
 123             wc.lpszClassName = "SizeTipClass";
 124
 125             tip_class = RegisterClass(&wc);
 126         }
 127
 128 #if 0
 129         /* Default values based on Windows Standard color scheme */
 130
 131         tip_font = GetStockObject(SYSTEM_FONT);
 132         tip_bg = RGB(255, 255, 225);
 133         tip_text = RGB(0, 0, 0);
 134 #endif
 135
 136         /* Prepare other GDI objects and drawing info */
 137
 138         tip_bg = GetSysColor(COLOR_INFOBK);
 139         tip_text = GetSysColor(COLOR_INFOTEXT);
 140
 141         memset(&nci, 0, sizeof(NONCLIENTMETRICS));
 142         nci.cbSize = sizeof(NONCLIENTMETRICS);
 143         SystemParametersInfo(SPI_GETNONCLIENTMETRICS, sizeof(NONCLIENTMETRICS), &nci, 0);
 144         tip_font = CreateFontIndirect(&nci.lfStatusFont);
 145     }
 146
 147     /* Generate the tip text */
 148
 149     sprintf(str, "%dx%d", cx, cy);
 150
 151     if (!tip_wnd) {
 152         HDC hdc;
 153         SIZE sz;
 154         RECT wr;
 155         int ix, iy;
 156
 157         /* calculate the tip's size */
 158
 159         hdc = CreateCompatibleDC(NULL);
 160         GetTextExtentPoint32(hdc, str, _tcslen(str), &sz);
 161         DeleteDC(hdc);
 162
 163         GetWindowRect(src, &wr);
 164
 165         ix = wr.left;
 166         if (ix<16) ix = 16;
 167
 168         iy = wr.top - sz.cy;
 169         if (iy<16) iy = 16;
 170
 171         /* Create the tip window */
 172
 173         tip_wnd = CreateWindowEx(WS_EX_TOOLWINDOW|WS_EX_TOPMOST, MAKEINTRESOURCE(tip_class), str, WS_POPUP,
 174                                  ix, iy, sz.cx, sz.cy,
 175                                  NULL, NULL, hinst, NULL);
 176
 177         ShowWindow(tip_wnd, SW_SHOWNOACTIVATE);
 178
 179     } else {
 180
 181         /* Tip already exists, just set the text */
 182
 183         SetWindowText(tip_wnd, str);
 184     }
 185 }
 186
 187 void EnableSizeTip(int bEnable)
 188 {
 189     if (tip_wnd && !bEnable) {
 190         DestroyWindow(tip_wnd);
 191         tip_wnd = NULL;
 192     }
 193
 194     tip_enabled = bEnable;
 195 }