git.distorted.org.uk Git - u/mdw/putty/blob - windows/sizetip.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <tchar.h>
   4
   5 #include "putty.h"
   6
   7 static ATOM tip_class = 0;
   8
   9 static HFONT tip_font;
  10 static COLORREF tip_bg;
  11 static COLORREF tip_text;
  12
  13 static LRESULT CALLBACK SizeTipWndProc(HWND hWnd, UINT nMsg,
  14                                        WPARAM wParam, LPARAM lParam)
  15 {
  16
  17     switch (nMsg) {
  18       case WM_ERASEBKGND:
  19         return TRUE;
  20
  21       case WM_PAINT:
  22         {
  23             HBRUSH hbr;
  24             HGDIOBJ holdbr;
  25             RECT cr;
  26             int wtlen;
  27             LPTSTR wt;
  28             HDC hdc;
  29
  30             PAINTSTRUCT ps;
  31             hdc = BeginPaint(hWnd, &ps);
  32
  33             SelectObject(hdc, tip_font);
  34             SelectObject(hdc, GetStockObject(BLACK_PEN));
  35
  36             hbr = CreateSolidBrush(tip_bg);
  37             holdbr = SelectObject(hdc, hbr);
  38
  39             GetClientRect(hWnd, &cr);
  40             Rectangle(hdc, cr.left, cr.top, cr.right, cr.bottom);
  41
  42             wtlen = GetWindowTextLength(hWnd);
  43             wt = (LPTSTR) snewn(wtlen + 1, TCHAR);
  44             GetWindowText(hWnd, wt, wtlen + 1);
  45
  46             SetTextColor(hdc, tip_text);
  47             SetBkColor(hdc, tip_bg);
  48
  49             TextOut(hdc, cr.left + 3, cr.top + 3, wt, wtlen);
  50
  51             sfree(wt);
  52
  53             SelectObject(hdc, holdbr);
  54             DeleteObject(hbr);
  55
  56             EndPaint(hWnd, &ps);
  57         }
  58         return 0;
  59
  60       case WM_NCHITTEST:
  61         return HTTRANSPARENT;
  62
  63       case WM_DESTROY:
  64         DeleteObject(tip_font);
  65         tip_font = NULL;
  66         break;
  67
  68       case WM_SETTEXT:
  69         {
  70             LPCTSTR str = (LPCTSTR) lParam;
  71             SIZE sz;
  72             HDC hdc = CreateCompatibleDC(NULL);
  73
  74             SelectObject(hdc, tip_font);
  75             GetTextExtentPoint32(hdc, str, _tcslen(str), &sz);
  76
  77             SetWindowPos(hWnd, NULL, 0, 0, sz.cx + 6, sz.cy + 6,
  78                          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 static HWND tip_wnd = NULL;
  90 static int tip_enabled = 0;
  91
  92 void UpdateSizeTip(HWND src, int cx, int cy)
  93 {
  94     TCHAR str[32];
  95
  96     if (!tip_enabled)
  97         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 = hinst;
 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 #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,
 135                              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)
 159             ix = 16;
 160
 161         iy = wr.top - sz.cy;
 162         if (iy < 16)
 163             iy = 16;
 164
 165         /* Create the tip window */
 166
 167         tip_wnd =
 168             CreateWindowEx(WS_EX_TOOLWINDOW | WS_EX_TOPMOST,
 169                            MAKEINTRESOURCE(tip_class), str, WS_POPUP, ix,
 170                            iy, sz.cx, sz.cy, NULL, NULL, hinst, NULL);
 171
 172         ShowWindow(tip_wnd, SW_SHOWNOACTIVATE);
 173
 174     } else {
 175
 176         /* Tip already exists, just set the text */
 177
 178         SetWindowText(tip_wnd, str);
 179     }
 180 }
 181
 182 void EnableSizeTip(int bEnable)
 183 {
 184     if (tip_wnd && !bEnable) {
 185         DestroyWindow(tip_wnd);
 186         tip_wnd = NULL;
 187     }
 188
 189     tip_enabled = bEnable;
 190 }