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,
  81                          SWP_NOZORDER | SWP_NOMOVE | SWP_NOACTIVATE);
  82             InvalidateRect(hWnd, NULL, FALSE);
  83
  84             DeleteDC(hdc);
  85         }
  86         break;
  87     }
  88
  89     return DefWindowProc(hWnd, nMsg, wParam, lParam);
  90 }
  91
  92 static HWND tip_wnd = NULL;
  93 static int tip_enabled = 0;
  94
  95 void UpdateSizeTip(HWND src, int cx, int cy)
  96 {
  97     TCHAR str[32];
  98
  99     if (!tip_enabled)
 100         return;
 101
 102     if (!tip_wnd) {
 103         NONCLIENTMETRICS nci;
 104
 105         /* First make sure the window class is registered */
 106
 107         if (!tip_class) {
 108             WNDCLASS wc;
 109             wc.style = CS_HREDRAW | CS_VREDRAW;
 110             wc.lpfnWndProc = SizeTipWndProc;
 111             wc.cbClsExtra = 0;
 112             wc.cbWndExtra = 0;
 113             wc.hInstance = hinst;
 114             wc.hIcon = NULL;
 115             wc.hCursor = NULL;
 116             wc.hbrBackground = NULL;
 117             wc.lpszMenuName = NULL;
 118             wc.lpszClassName = "SizeTipClass";
 119
 120             tip_class = RegisterClass(&wc);
 121         }
 122 #if 0
 123         /* Default values based on Windows Standard color scheme */
 124
 125         tip_font = GetStockObject(SYSTEM_FONT);
 126         tip_bg = RGB(255, 255, 225);
 127         tip_text = RGB(0, 0, 0);
 128 #endif
 129
 130         /* Prepare other GDI objects and drawing info */
 131
 132         tip_bg = GetSysColor(COLOR_INFOBK);
 133         tip_text = GetSysColor(COLOR_INFOTEXT);
 134
 135         memset(&nci, 0, sizeof(NONCLIENTMETRICS));
 136         nci.cbSize = sizeof(NONCLIENTMETRICS);
 137         SystemParametersInfo(SPI_GETNONCLIENTMETRICS,
 138                              sizeof(NONCLIENTMETRICS), &nci, 0);
 139         tip_font = CreateFontIndirect(&nci.lfStatusFont);
 140     }
 141
 142     /* Generate the tip text */
 143
 144     sprintf(str, "%dx%d", cx, cy);
 145
 146     if (!tip_wnd) {
 147         HDC hdc;
 148         SIZE sz;
 149         RECT wr;
 150         int ix, iy;
 151
 152         /* calculate the tip's size */
 153
 154         hdc = CreateCompatibleDC(NULL);
 155         GetTextExtentPoint32(hdc, str, _tcslen(str), &sz);
 156         DeleteDC(hdc);
 157
 158         GetWindowRect(src, &wr);
 159
 160         ix = wr.left;
 161         if (ix < 16)
 162             ix = 16;
 163
 164         iy = wr.top - sz.cy;
 165         if (iy < 16)
 166             iy = 16;
 167
 168         /* Create the tip window */
 169
 170         tip_wnd =
 171             CreateWindowEx(WS_EX_TOOLWINDOW | WS_EX_TOPMOST,
 172                            MAKEINTRESOURCE(tip_class), str, WS_POPUP, ix,
 173                            iy, sz.cx, sz.cy, NULL, NULL, hinst, NULL);
 174
 175         ShowWindow(tip_wnd, SW_SHOWNOACTIVATE);
 176
 177     } else {
 178
 179         /* Tip already exists, just set the text */
 180
 181         SetWindowText(tip_wnd, str);
 182     }
 183 }
 184
 185 void EnableSizeTip(int bEnable)
 186 {
 187     if (tip_wnd && !bEnable) {
 188         DestroyWindow(tip_wnd);
 189         tip_wnd = NULL;
 190     }
 191
 192     tip_enabled = bEnable;
 193 }