Refactored Kyrandia GUI code a bit.

svn-id: r31290

1 files changed, 298 insertions, 0 deletions

diff --git a/engines/kyra/gui.cpp b/engines/kyra/gui.cpp
new file mode 100644
index 0000000000..f949ab81bd
--- /dev/null
+++ b/engines/kyra/gui.cpp
@@ -0,0 +1,298 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *
+ */
+
+#include "kyra/gui.h"
+
+#include "kyra/screen.h"
+#include "kyra/text.h"
+
+namespace Kyra {
+
+GUI::GUI(KyraEngine *kyra)
+	: _vm(kyra), _screen(kyra->screen()), _text(kyra->text()) {
+	_menuButtonList = 0;
+	_haveScrollButtons = false;
+
+	_redrawButtonFunctor = BUTTON_FUNCTOR(GUI, this, &GUI::redrawButtonCallback);
+	_redrawShadedButtonFunctor = BUTTON_FUNCTOR(GUI, this, &GUI::redrawShadedButtonCallback);
+}
+
+Button *GUI::addButtonToList(Button *list, Button *newButton) {
+	if (!newButton)
+		return list;
+
+	newButton->nextButton = 0;
+
+	if (list) {
+		Button *cur = list;
+		while (cur->nextButton)
+			cur = cur->nextButton;
+		cur->nextButton = newButton;
+	} else {
+		list = newButton;
+	}
+
+	return list;
+}
+
+void GUI::initMenuLayout(Menu &menu) {
+	if (menu.x == -1)
+		menu.x = (320 - menu.width) >> 1;
+	if (menu.y == -1)
+		menu.y = (200 - menu.height) >> 1;
+
+	for (int i = 0; i < menu.numberOfItems; ++i) {
+		if (menu.item[i].x == -1)
+			menu.item[i].x = (menu.width - menu.item[i].width) >> 1;
+	}
+}
+
+void GUI::initMenu(Menu &menu) {
+	_menuButtonList = 0;
+
+	_screen->hideMouse();
+
+	int textX;
+	int textY;
+
+	int menu_x2 = menu.width  + menu.x - 1;
+	int menu_y2 = menu.height + menu.y - 1;
+
+	_screen->fillRect(menu.x + 2, menu.y + 2, menu_x2 - 2, menu_y2 - 2, menu.bkgdColor);
+	_screen->drawShadedBox(menu.x, menu.y, menu_x2, menu_y2, menu.color1, menu.color2);
+
+	if (menu.titleX != -1)
+		textX = menu.titleX;
+	else
+		textX = _text->getCenterStringX(getMenuTitle(menu), menu.x, menu_x2);
+
+	textY = menu.y + menu.titleY;
+
+	_text->printText(getMenuTitle(menu), textX - 1, textY + 1, defaultColor1(), defaultColor2(), 0);
+	_text->printText(getMenuTitle(menu), textX, textY, menu.textColor, 0, 0);
+
+	int x1, y1, x2, y2;
+	for (int i = 0; i < menu.numberOfItems; ++i) {
+		if (!menu.item[i].enabled)
+			continue;
+
+		x1 = menu.x + menu.item[i].x;
+		y1 = menu.y + menu.item[i].y;
+
+		x2 = x1 + menu.item[i].width - 1;
+		y2 = y1 + menu.item[i].height - 1;
+
+		if (i < 7) {
+			Button *menuButtonData = getButtonListData() + i;
+			menuButtonData->nextButton = 0;
+			menuButtonData->x = x1;
+			menuButtonData->y = y1;
+			menuButtonData->width  = menu.item[i].width - 1;
+			menuButtonData->height = menu.item[i].height - 1;
+			menuButtonData->buttonCallback = menu.item[i].callback;
+			menuButtonData->index = menu.item[i].saveSlot;
+			menuButtonData->unk6 = menu.item[i].unk1F;
+			menuButtonData->unk8 = 0;
+
+			_menuButtonList = addButtonToList(_menuButtonList, menuButtonData);
+		}
+
+		_screen->fillRect(x1, y1, x2, y2, menu.item[i].bkgdColor);
+		_screen->drawShadedBox(x1, y1, x2, y2, menu.item[i].color1, menu.item[i].color2);
+
+		if (menu.item[i].itemString) {
+			if (menu.item[i].titleX != -1)
+				textX = x1 + menu.item[i].titleX + 3;
+			else
+				textX = _text->getCenterStringX(menu.item[i].itemString, x1, x2);
+
+			textY = y1 + 2;
+			_text->printText(menu.item[i].itemString, textX - 1, textY + 1, defaultColor1(), 0, 0);
+
+			if (i == menu.highlightedItem)
+				_text->printText(menu.item[i].itemString, textX, textY, menu.item[i].highlightColor, 0, 0);
+			else
+				_text->printText(menu.item[i].itemString, textX, textY, menu.item[i].textColor, 0, 0);
+
+			if (getMenuItemLabel(menu.item[i])) {
+				_text->printText(getMenuItemLabel(menu.item[i]), menu.x + menu.item[i].labelX - 1, menu.y + menu.item[i].labelY + 1, defaultColor1(), 0, 0);
+				_text->printText(getMenuItemLabel(menu.item[i]), menu.x + menu.item[i].labelX, menu.y + menu.item[i].labelY, menu.item[i].textColor, 0, 0);
+			}
+		}
+	}
+
+	if (menu.scrollUpButtonX != -1) {
+		_haveScrollButtons = true;
+
+		Button *scrollUpButton = getScrollUpButton();
+		scrollUpButton->x = menu.scrollUpButtonX + menu.x;
+		scrollUpButton->y = menu.scrollUpButtonY + menu.y;
+		scrollUpButton->buttonCallback = getScrollUpButtonHandler();
+		scrollUpButton->nextButton = 0;
+		
+		_menuButtonList = addButtonToList(_menuButtonList, scrollUpButton);
+		updateMenuButton(scrollUpButton);
+
+		Button *scrollDownButton = getScrollDownButton();
+		scrollDownButton->x = menu.scrollDownButtonX + menu.x;
+		scrollDownButton->y = menu.scrollDownButtonY + menu.y;
+		scrollDownButton->buttonCallback = getScrollDownButtonHandler();
+		scrollDownButton->nextButton = 0;
+
+		_menuButtonList = addButtonToList(_menuButtonList, scrollDownButton);
+		updateMenuButton(scrollDownButton);
+	} else {
+		_haveScrollButtons = false;
+	}
+
+	_screen->showMouse();
+	_screen->updateScreen();
+}
+
+void GUI::processHighlights(Menu &menu, int mouseX, int mouseY) {
+	int x1, y1, x2, y2;
+
+	for (int i = 0; i < menu.numberOfItems; ++i) {
+		if (!menu.item[i].enabled)
+			continue;
+
+		x1 = menu.x + menu.item[i].x;
+		y1 = menu.y + menu.item[i].y;
+
+		x2 = x1 + menu.item[i].width;
+		y2 = y1 + menu.item[i].height;
+
+		if (mouseX > x1 && mouseX < x2 &&
+			mouseY > y1 && mouseY < y2) {
+
+			if (menu.highlightedItem != i) {
+				if (menu.item[menu.highlightedItem].enabled)
+					redrawText(menu);
+
+				menu.highlightedItem = i;
+				redrawHighlight(menu);
+				_screen->updateScreen();
+			}
+		}
+	}
+}
+
+void GUI::redrawText(const Menu &menu) {
+	int textX;
+	int i = menu.highlightedItem;
+
+	int x1 = menu.x + menu.item[i].x;
+	int y1 = menu.y + menu.item[i].y;
+
+	int x2 = x1 + menu.item[i].width - 1;
+
+	if (menu.item[i].titleX >= 0)
+		textX = x1 + menu.item[i].titleX + 3;
+	else
+		textX = _text->getCenterStringX(getMenuItemTitle(menu.item[i]), x1, x2);
+
+	int textY = y1 + 2;
+	_text->printText(getMenuItemTitle(menu.item[i]), textX - 1, textY + 1, defaultColor1(), 0, 0);
+	_text->printText(getMenuItemTitle(menu.item[i]), textX, textY, menu.item[i].textColor, 0, 0);
+}
+
+void GUI::redrawHighlight(const Menu &menu) {
+	int textX;
+	int i = menu.highlightedItem;
+
+	int x1 = menu.x + menu.item[i].x;
+	int y1 = menu.y + menu.item[i].y;
+
+	int x2 = x1 + menu.item[i].width - 1;
+
+	if (menu.item[i].titleX != -1)
+		textX = x1 + menu.item[i].titleX + 3;
+	else
+		textX = _text->getCenterStringX(getMenuItemTitle(menu.item[i]), x1, x2);
+
+	int textY = y1 + 2;
+	_text->printText(getMenuItemTitle(menu.item[i]), textX - 1, textY + 1, defaultColor1(), 0, 0);
+	_text->printText(getMenuItemTitle(menu.item[i]), textX, textY, menu.item[i].highlightColor, 0, 0);
+}
+
+void GUI::updateAllMenuButtons() {
+	for (Button *cur = _menuButtonList; cur; cur = cur->nextButton)
+		updateMenuButton(cur);
+}
+
+void GUI::updateMenuButton(Button *button) {
+	if (!_displayMenu)
+		return;
+
+	_screen->hideMouse();
+	updateButton(button);
+	_screen->showMouse();
+}
+
+void GUI::updateButton(Button *button) {
+	if (!button || (button->flags & 8))
+		return;
+
+	if (button->flags2 & 1)
+		button->flags2 &= 0xFFF7;
+	else
+		button->flags2 |= 8;
+
+	button->flags2 &= 0xFFFC;
+
+	if (button->flags2 & 4)
+		button->flags2 |= 0x10;
+	else
+		button->flags2 &= 0xEEEF;
+
+	button->flags2 &= 0xFFFB;
+
+	processButton(button);
+}
+
+int GUI::redrawButtonCallback(Button *button) {
+	if (!_displayMenu)
+		return 0;
+
+	_screen->hideMouse();
+	_screen->drawBox(button->x + 1, button->y + 1, button->x + button->width - 1, button->y + button->height - 1, 0xF8);
+	_screen->showMouse();
+
+	return 0;
+}
+
+int GUI::redrawShadedButtonCallback(Button *button) {
+	if (!_displayMenu)
+		return 0;
+
+	_screen->hideMouse();
+	_screen->drawShadedBox(button->x, button->y, button->x + button->width, button->y + button->height, 0xF9, 0xFA);
+	_screen->showMouse();
+
+	return 0;
+}
+
+} // end of namespace Kyra
+