reactos/rosapps/calc/button.c

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/*
* ReactOS calc
*
* button.c
*
* Copyright (C) 2002 Robert Dickenson <robd@reactos.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers
#include <windows.h>
#include <tchar.h>
#include "button.h"
COLORREF text_colour;
COLORREF background_colour;
COLORREF disabled_background_colour;
COLORREF light;
COLORREF highlight;
COLORREF shadow;
COLORREF dark_shadow;
const COLORREF CLR_BTN_WHITE = RGB(255, 255, 255);
const COLORREF CLR_BTN_BLACK = RGB(0, 0, 0);
const COLORREF CLR_BTN_DGREY = RGB(128, 128, 128);
const COLORREF CLR_BTN_GREY = RGB(192, 192, 192);
const COLORREF CLR_BTN_LLGREY = RGB(223, 223, 223);
const int BUTTON_IN = 0x01;
const int BUTTON_OUT = 0x02;
const int BUTTON_BLACK_BORDER = 0x04;
void InitColours(void)
{
// text_colour = GetSysColor(COLOR_BTNTEXT);
text_colour = RGB(255,0,0);
background_colour = GetSysColor(COLOR_BTNFACE);
disabled_background_colour = background_colour;
light = GetSysColor(COLOR_3DLIGHT);
highlight = GetSysColor(COLOR_BTNHIGHLIGHT);
shadow = GetSysColor(COLOR_BTNSHADOW);
dark_shadow = GetSysColor(COLOR_3DDKSHADOW);
}
static void FillSolidRect(HDC hDC, int x, int y, int cx, int cy, COLORREF clr)
{
RECT rect;
SetBkColor(hDC, clr);
rect.left = x;
rect.top = y;
rect.right = x + cx;
rect.bottom = y + cy;
ExtTextOut(hDC, 0, 0, ETO_OPAQUE, &rect, NULL, 0, NULL);
}
void Draw3dRect(HDC hDC, int x, int y, int cx, int cy, COLORREF clrTopLeft, COLORREF clrBottomRight)
{
FillSolidRect(hDC, x, y, cx - 1, 1, clrTopLeft);
FillSolidRect(hDC, x, y, 1, cy - 1, clrTopLeft);
FillSolidRect(hDC, x + cx, y, -1, cy, clrBottomRight);
FillSolidRect(hDC, x, y + cy, cx, -1, clrBottomRight);
}
void DrawFilledRect(HDC hdc, LPRECT r, COLORREF colour)
{
HBRUSH hBrush;
hBrush = CreateSolidBrush(colour);
FillRect(hdc, r, hBrush);
}
void DrawLine(HDC hdc, long sx, long sy, long ex, long ey, COLORREF colour)
{
HPEN new_pen;
HPEN old_pen;
new_pen = CreatePen(PS_SOLID, 1, colour);
old_pen = SelectObject(hdc, &new_pen);
MoveToEx(hdc, sx, sy, NULL);
LineTo(hdc, ex, ey);
SelectObject(hdc, old_pen);
DeleteObject(new_pen);
}
void DrawFrame(HDC hdc, RECT r, int state)
{
COLORREF colour;
if (state & BUTTON_BLACK_BORDER) {
colour = CLR_BTN_BLACK;
DrawLine(hdc, r.left, r.top, r.right, r.top, colour); // Across top
DrawLine(hdc, r.left, r.top, r.left, r.bottom, colour); // Down left
DrawLine(hdc, r.left, r.bottom - 1, r.right, r.bottom - 1, colour); // Across bottom
DrawLine(hdc, r.right - 1, r.top, r.right - 1, r.bottom, colour); // Down right
InflateRect(&r, -1, -1);
}
if (state & BUTTON_OUT) {
colour = highlight;
DrawLine(hdc, r.left, r.top, r.right, r.top, colour); // Across top
DrawLine(hdc, r.left, r.top, r.left, r.bottom, colour); // Down left
colour = dark_shadow;
DrawLine(hdc, r.left, r.bottom - 1, r.right, r.bottom - 1, colour); // Across bottom
DrawLine(hdc, r.right - 1, r.top, r.right - 1, r.bottom, colour); // Down right
InflateRect(&r, -1, -1);
colour = light;
DrawLine(hdc, r.left, r.top, r.right, r.top, colour); // Across top
DrawLine(hdc, r.left, r.top, r.left, r.bottom, colour); // Down left
colour = shadow;
DrawLine(hdc, r.left, r.bottom - 1, r.right, r.bottom - 1, colour); // Across bottom
DrawLine(hdc, r.right - 1, r.top, r.right - 1, r.bottom, colour); // Down right
}
if (state & BUTTON_IN) {
colour = dark_shadow;
DrawLine(hdc, r.left, r.top, r.right, r.top, colour); // Across top
DrawLine(hdc, r.left, r.top, r.left, r.bottom, colour); // Down left
DrawLine(hdc, r.left, r.bottom - 1, r.right, r.bottom - 1, colour); // Across bottom
DrawLine(hdc, r.right - 1, r.top, r.right - 1, r.bottom, colour); // Down right
InflateRect(&r, -1, -1);
colour = shadow;
DrawLine(hdc, r.left, r.top, r.right, r.top, colour); // Across top
DrawLine(hdc, r.left, r.top, r.left, r.bottom, colour); // Down left
DrawLine(hdc, r.left, r.bottom - 1, r.right, r.bottom - 1, colour); // Across bottom
DrawLine(hdc, r.right - 1, r.top, r.right - 1, r.bottom, colour); // Down right
}
}
void DrawButtonText(HDC hdc, LPRECT r, LPCTSTR Buf, COLORREF text_colour)
{
COLORREF previous_colour;
previous_colour = SetTextColor(hdc, text_colour);
SetBkMode(hdc, TRANSPARENT);
DrawText(hdc, Buf, _tcslen(Buf), r, DT_CENTER | DT_VCENTER | DT_SINGLELINE);
SetTextColor(hdc, previous_colour);
}
#define bufSize 512
void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
HDC hdc;
RECT focus_rect, button_rect, offset_button_rect;
UINT state;
TCHAR buffer[bufSize];
hdc = lpDrawItemStruct->hDC;
state = lpDrawItemStruct->itemState;
CopyRect(&focus_rect, &lpDrawItemStruct->rcItem);
CopyRect(&button_rect, &lpDrawItemStruct->rcItem);
// Set the focus rectangle to just past the border decoration
focus_rect.left += 4;
focus_rect.right -= 4;
focus_rect.top += 4;
focus_rect.bottom -= 4;
// Retrieve the button's caption
GetWindowText(lpDrawItemStruct->hwndItem, buffer, bufSize);
if (state & ODS_DISABLED) {
DrawFilledRect(hdc, &button_rect, disabled_background_colour);
} else {
DrawFilledRect(hdc, &button_rect, background_colour);
}
if (state & ODS_SELECTED) {
DrawFrame(hdc, button_rect, BUTTON_IN);
} else {
if ((state & ODS_DEFAULT) || (state & ODS_FOCUS)) {
DrawFrame(hdc, button_rect, BUTTON_OUT | BUTTON_BLACK_BORDER);
} else {
DrawFrame(hdc, button_rect, BUTTON_OUT);
}
}
if (state & ODS_DISABLED) {
offset_button_rect = button_rect;
OffsetRect(&offset_button_rect, 1, 1);
DrawButtonText(hdc, &offset_button_rect, buffer, CLR_BTN_WHITE);
DrawButtonText(hdc, &button_rect, buffer, CLR_BTN_DGREY);
} else {
DrawButtonText(hdc, &button_rect, buffer, text_colour);
}
if (state & ODS_FOCUS) {
DrawFocusRect(lpDrawItemStruct->hDC, (LPRECT)&focus_rect);
}
}