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

   1 /*
   2  * sizetip.c - resize tips for PuTTY(tel) terminal window.
   3  */
   4
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <tchar.h>
   8
   9 #include "putty.h"
  10
  11 static ATOM tip_class = 0;
  12
  13 static HFONT tip_font;
  14 static COLORREF tip_bg;
  15 static COLORREF tip_text;
  16
  17 static LRESULT CALLBACK SizeTipWndProc(HWND hWnd, UINT nMsg,
  18                                        WPARAM wParam, LPARAM lParam)
  19 {
  20
  21     switch (nMsg) {
  22       case WM_ERASEBKGND:
  23         return TRUE;
  24
  25       case WM_PAINT:
  26         {
  27             HBRUSH hbr;
  28             HGDIOBJ holdbr;
  29             RECT cr;
  30             int wtlen;
  31             LPTSTR wt;
  32             HDC hdc;
  33
  34             PAINTSTRUCT ps;
  35             hdc = BeginPaint(hWnd, &ps);
  36
  37             SelectObject(hdc, tip_font);
  38             SelectObject(hdc, GetStockObject(BLACK_PEN));
  39
  40             hbr = CreateSolidBrush(tip_bg);
  41             holdbr = SelectObject(hdc, hbr);
  42
  43             GetClientRect(hWnd, &cr);
  44             Rectangle(hdc, cr.left, cr.top, cr.right, cr.bottom);
  45
  46             wtlen = GetWindowTextLength(hWnd);
  47             wt = (LPTSTR) snewn(wtlen + 1, TCHAR);
  48             GetWindowText(hWnd, wt, wtlen + 1);
  49
  50             SetTextColor(hdc, tip_text);
  51             SetBkColor(hdc, tip_bg);
  52
  53             TextOut(hdc, cr.left + 3, cr.top + 3, wt, wtlen);
  54
  55             sfree(wt);
  56
  57             SelectObject(hdc, holdbr);
  58             DeleteObject(hbr);
  59
  60             EndPaint(hWnd, &ps);
  61         }
  62         return 0;
  63
  64       case WM_NCHITTEST:
  65         return HTTRANSPARENT;
  66
  67       case WM_DESTROY:
  68         DeleteObject(tip_font);
  69         tip_font = NULL;
  70         break;
  71
  72       case WM_SETTEXT:
  73         {
  74             LPCTSTR str = (LPCTSTR) lParam;
  75             SIZE sz;
  76             HDC hdc = CreateCompatibleDC(NULL);
  77
  78             SelectObject(hdc, tip_font);
  79             GetTextExtentPoint32(hdc, str, _tcslen(str), &sz);
  80
  81             SetWindowPos(hWnd, NULL, 0, 0, sz.cx + 6, sz.cy + 6,
  82                          SWP_NOZORDER | SWP_NOMOVE | SWP_NOACTIVATE);
  83             InvalidateRect(hWnd, NULL, FALSE);
  84
  85             DeleteDC(hdc);
  86         }
  87         break;
  88     }
  89
  90     return DefWindowProc(hWnd, nMsg, wParam, lParam);
  91 }
  92
  93 static HWND tip_wnd = NULL;
  94 static int tip_enabled = 0;
  95
  96 void UpdateSizeTip(HWND src, int cx, int cy)
  97 {
  98     TCHAR str[32];
  99
 100     if (!tip_enabled)
 101         return;
 102
 103     if (!tip_wnd) {
 104         NONCLIENTMETRICS nci;
 105
 106         /* First make sure the window class is registered */
 107
 108         if (!tip_class) {
 109             WNDCLASS wc;
 110             wc.style = CS_HREDRAW | CS_VREDRAW;
 111             wc.lpfnWndProc = SizeTipWndProc;
 112             wc.cbClsExtra = 0;
 113             wc.cbWndExtra = 0;
 114             wc.hInstance = hinst;
 115             wc.hIcon = NULL;
 116             wc.hCursor = NULL;
 117             wc.hbrBackground = NULL;
 118             wc.lpszMenuName = NULL;
 119             wc.lpszClassName = "SizeTipClass";
 120
 121             tip_class = RegisterClass(&wc);
 122         }
 123 #if 0
 124         /* Default values based on Windows Standard color scheme */
 125
 126         tip_font = GetStockObject(SYSTEM_FONT);
 127         tip_bg = RGB(255, 255, 225);
 128         tip_text = RGB(0, 0, 0);
 129 #endif
 130
 131         /* Prepare other GDI objects and drawing info */
 132
 133         tip_bg = GetSysColor(COLOR_INFOBK);
 134         tip_text = GetSysColor(COLOR_INFOTEXT);
 135
 136         memset(&nci, 0, sizeof(NONCLIENTMETRICS));
 137         nci.cbSize = sizeof(NONCLIENTMETRICS);
 138         SystemParametersInfo(SPI_GETNONCLIENTMETRICS,
 139                              sizeof(NONCLIENTMETRICS), &nci, 0);
 140         tip_font = CreateFontIndirect(&nci.lfStatusFont);
 141     }
 142
 143     /* Generate the tip text */
 144
 145     sprintf(str, "%dx%d", cx, cy);
 146
 147     if (!tip_wnd) {
 148         HDC hdc;
 149         SIZE sz;
 150         RECT wr;
 151         int ix, iy;
 152
 153         /* calculate the tip's size */
 154
 155         hdc = CreateCompatibleDC(NULL);
 156         GetTextExtentPoint32(hdc, str, _tcslen(str), &sz);
 157         DeleteDC(hdc);
 158
 159         GetWindowRect(src, &wr);
 160
 161         ix = wr.left;
 162         if (ix < 16)
 163             ix = 16;
 164
 165         iy = wr.top - sz.cy;
 166         if (iy < 16)
 167             iy = 16;
 168
 169         /* Create the tip window */
 170
 171         tip_wnd =
 172             CreateWindowEx(WS_EX_TOOLWINDOW | WS_EX_TOPMOST,
 173                            MAKEINTRESOURCE(tip_class), str, WS_POPUP, ix,
 174                            iy, sz.cx, sz.cy, NULL, NULL, hinst, NULL);
 175
 176         ShowWindow(tip_wnd, SW_SHOWNOACTIVATE);
 177
 178     } else {
 179
 180         /* Tip already exists, just set the text */
 181
 182         SetWindowText(tip_wnd, str);
 183     }
 184 }
 185
 186 void EnableSizeTip(int bEnable)
 187 {
 188     if (tip_wnd && !bEnable) {
 189         DestroyWindow(tip_wnd);
 190         tip_wnd = NULL;
 191     }
 192
 193     tip_enabled = bEnable;
 194 }