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

   1 #include <windows.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <tchar.h>
   5
   6 #include "putty.h"
   7 #include "winstuff.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) snewn(wtlen + 1, 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             sfree(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,
  80                          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)
  99         return;
 100
 101     if (!tip_wnd) {
 102         NONCLIENTMETRICS nci;
 103
 104         /* First make sure the window class is registered */
 105
 106         if (!tip_class) {
 107             WNDCLASS wc;
 108             wc.style = CS_HREDRAW | CS_VREDRAW;
 109             wc.lpfnWndProc = SizeTipWndProc;
 110             wc.cbClsExtra = 0;
 111             wc.cbWndExtra = 0;
 112             wc.hInstance = hinst;
 113             wc.hIcon = NULL;
 114             wc.hCursor = NULL;
 115             wc.hbrBackground = NULL;
 116             wc.lpszMenuName = NULL;
 117             wc.lpszClassName = "SizeTipClass";
 118
 119             tip_class = RegisterClass(&wc);
 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,
 137                              sizeof(NONCLIENTMETRICS), &nci, 0);
 138         tip_font = CreateFontIndirect(&nci.lfStatusFont);
 139     }
 140
 141     /* Generate the tip text */
 142
 143     sprintf(str, "%dx%d", cx, cy);
 144
 145     if (!tip_wnd) {
 146         HDC hdc;
 147         SIZE sz;
 148         RECT wr;
 149         int ix, iy;
 150
 151         /* calculate the tip's size */
 152
 153         hdc = CreateCompatibleDC(NULL);
 154         GetTextExtentPoint32(hdc, str, _tcslen(str), &sz);
 155         DeleteDC(hdc);
 156
 157         GetWindowRect(src, &wr);
 158
 159         ix = wr.left;
 160         if (ix < 16)
 161             ix = 16;
 162
 163         iy = wr.top - sz.cy;
 164         if (iy < 16)
 165             iy = 16;
 166
 167         /* Create the tip window */
 168
 169         tip_wnd =
 170             CreateWindowEx(WS_EX_TOOLWINDOW | WS_EX_TOPMOST,
 171                            MAKEINTRESOURCE(tip_class), str, WS_POPUP, ix,
 172                            iy, sz.cx, sz.cy, NULL, NULL, hinst, NULL);
 173
 174         ShowWindow(tip_wnd, SW_SHOWNOACTIVATE);
 175
 176     } else {
 177
 178         /* Tip already exists, just set the text */
 179
 180         SetWindowText(tip_wnd, str);
 181     }
 182 }
 183
 184 void EnableSizeTip(int bEnable)
 185 {
 186     if (tip_wnd && !bEnable) {
 187         DestroyWindow(tip_wnd);
 188         tip_wnd = NULL;
 189     }
 190
 191     tip_enabled = bEnable;
 192 }