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