mirror of
https://github.com/libretro/scummvm.git
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0ec41a2d80
- reworked state (enabled/disabled/highlighted) handling of widgets - cleanup in ModernTheme.cpp svn-id: r29403
437 lines
11 KiB
C++
437 lines
11 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*/
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#include "common/system.h"
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#include "common/events.h"
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#include "gui/dialog.h"
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#include "gui/eval.h"
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#include "gui/newgui.h"
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#include "gui/PopUpWidget.h"
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#include "engines/engine.h"
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namespace GUI {
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//
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// PopUpDialog
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//
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class PopUpDialog : public Dialog {
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protected:
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PopUpWidget *_popUpBoss;
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int _clickX, _clickY;
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byte *_buffer;
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int _selection;
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uint32 _openTime;
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bool _twoColumns;
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int _entriesPerColumn;
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int _leftPadding;
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int _rightPadding;
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public:
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PopUpDialog(PopUpWidget *boss, int clickX, int clickY);
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void drawDialog();
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void handleMouseUp(int x, int y, int button, int clickCount);
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void handleMouseWheel(int x, int y, int direction); // Scroll through entries with scroll wheel
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void handleMouseMoved(int x, int y, int button); // Redraw selections depending on mouse position
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void handleKeyDown(Common::KeyState state); // Scroll through entries with arrow keys etc.
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protected:
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void drawMenuEntry(int entry, bool hilite);
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int findItem(int x, int y) const;
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void setSelection(int item);
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bool isMouseDown();
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void moveUp();
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void moveDown();
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};
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PopUpDialog::PopUpDialog(PopUpWidget *boss, int clickX, int clickY)
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: Dialog(0, 0, 16, 16, false),
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_popUpBoss(boss) {
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// Copy the selection index
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_selection = _popUpBoss->_selectedItem;
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// Calculate real popup dimensions
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_x = _popUpBoss->getAbsX() + _popUpBoss->_labelWidth + _popUpBoss->_labelSpacing;
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_y = _popUpBoss->getAbsY() - _popUpBoss->_selectedItem * kLineHeight;
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_h = _popUpBoss->_entries.size() * kLineHeight + 2;
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_w = _popUpBoss->_w - kLineHeight + 2 - _popUpBoss->_labelWidth - _popUpBoss->_labelSpacing;
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_leftPadding = _popUpBoss->_leftPadding;
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_rightPadding = _popUpBoss->_rightPadding;
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// Perform clipping / switch to scrolling mode if we don't fit on the screen
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// FIXME - OSystem should send out notification messages when the screen
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// resolution changes... we could generalize CommandReceiver and CommandSender.
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const int screenH = g_system->getOverlayHeight();
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// HACK: For now, we do not do scrolling. Instead, we draw the dialog
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// in two columns if it's too tall.
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if (_h >= screenH) {
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const int screenW = g_system->getOverlayWidth();
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_twoColumns = true;
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_entriesPerColumn = _popUpBoss->_entries.size() / 2;
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if (_popUpBoss->_entries.size() & 1)
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_entriesPerColumn++;
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_h = _entriesPerColumn * kLineHeight + 2;
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_w = 0;
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for (uint i = 0; i < _popUpBoss->_entries.size(); i++) {
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int width = g_gui.getStringWidth(_popUpBoss->_entries[i].name);
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if (width > _w)
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_w = width;
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}
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_w = 2 * _w + 10;
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if (!(_w & 1))
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_w++;
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if (_popUpBoss->_selectedItem >= _entriesPerColumn) {
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_x -= _w / 2;
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_y = _popUpBoss->getAbsY() - (_popUpBoss->_selectedItem - _entriesPerColumn) * kLineHeight;
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}
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if (_w >= screenW)
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_w = screenW - 1;
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if (_x < 0)
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_x = 0;
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if (_x + _w >= screenW)
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_x = screenW - 1 - _w;
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} else
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_twoColumns = false;
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if (_h >= screenH)
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_h = screenH - 1;
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if (_y < 0)
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_y = 0;
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else if (_y + _h >= screenH)
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_y = screenH - 1 - _h;
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// TODO - implement scrolling if we had to move the menu, or if there are too many entries
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// Remember original mouse position
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_clickX = clickX - _x;
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_clickY = clickY - _y;
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_openTime = 0;
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}
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void PopUpDialog::drawDialog() {
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// Draw the menu border
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g_gui.theme()->drawWidgetBackground(Common::Rect(_x, _y, _x+_w, _y+_h), THEME_HINT_FIRST_DRAW | THEME_HINT_SAVE_BACKGROUND | THEME_HINT_USE_SHADOW);
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/*if (_twoColumns)
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g_gui.vLine(_x + _w / 2, _y, _y + _h - 2, g_gui._color);*/
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// Draw the entries
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int count = _popUpBoss->_entries.size();
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for (int i = 0; i < count; i++) {
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drawMenuEntry(i, i == _selection);
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}
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// The last entry may be empty. Fill it with black.
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/*if (_twoColumns && (count & 1)) {
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g_gui.fillRect(_x + 1 + _w / 2, _y + 1 + kLineHeight * (_entriesPerColumn - 1), _w / 2 - 1, kLineHeight, g_gui._bgcolor);
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}*/
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if (_openTime == 0) {
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// Time the popup was opened
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_openTime = getMillis();
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}
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}
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void PopUpDialog::handleMouseUp(int x, int y, int button, int clickCount) {
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// Mouse was released. If it wasn't moved much since the original mouse down,
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// let the popup stay open. If it did move, assume the user made his selection.
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int dist = (_clickX - x) * (_clickX - x) + (_clickY - y) * (_clickY - y);
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if (dist > 3 * 3 || getMillis() - _openTime > 300) {
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setResult(_selection);
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close();
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}
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_clickX = -1;
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_clickY = -1;
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_openTime = (uint32)-1;
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}
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void PopUpDialog::handleMouseWheel(int x, int y, int direction) {
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if (direction < 0)
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moveUp();
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else if (direction > 0)
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moveDown();
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}
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void PopUpDialog::handleMouseMoved(int x, int y, int button) {
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// Compute over which item the mouse is...
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int item = findItem(x, y);
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if (item >= 0 && _popUpBoss->_entries[item].name.size() == 0)
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item = -1;
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if (item == -1 && !isMouseDown()) {
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setSelection(_popUpBoss->_selectedItem);
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return;
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}
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// ...and update the selection accordingly
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setSelection(item);
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}
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void PopUpDialog::handleKeyDown(Common::KeyState state) {
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if (state.keycode == Common::KEYCODE_ESCAPE) {
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// Don't change the previous selection
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setResult(-1);
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close();
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return;
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}
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if (isMouseDown())
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return;
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switch (state.keycode) {
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case Common::KEYCODE_RETURN:
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case Common::KEYCODE_KP_ENTER:
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setResult(_selection);
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close();
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break;
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case Common::KEYCODE_UP:
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moveUp();
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break;
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case Common::KEYCODE_DOWN:
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moveDown();
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break;
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case Common::KEYCODE_HOME:
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setSelection(0);
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break;
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case Common::KEYCODE_END:
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setSelection(_popUpBoss->_entries.size()-1);
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break;
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default:
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break;
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}
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}
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int PopUpDialog::findItem(int x, int y) const {
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if (x >= 0 && x < _w && y >= 0 && y < _h) {
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if (_twoColumns) {
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uint entry = (y - 2) / kLineHeight;
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if (x > _w / 2) {
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entry += _entriesPerColumn;
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if (entry >= _popUpBoss->_entries.size())
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return -1;
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}
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return entry;
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}
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return (y - 2) / kLineHeight;
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}
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return -1;
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}
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void PopUpDialog::setSelection(int item) {
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if (item != _selection) {
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// Undraw old selection
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if (_selection >= 0)
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drawMenuEntry(_selection, false);
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// Change selection
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_selection = item;
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// Draw new selection
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if (item >= 0)
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drawMenuEntry(item, true);
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}
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}
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bool PopUpDialog::isMouseDown() {
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// TODO/FIXME - need a way to determine whether any mouse buttons are pressed or not.
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// Sure, we could just count mouse button up/down events, but that is cumbersome and
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// error prone. Would be much nicer to add an API to OSystem for this...
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return false;
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}
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void PopUpDialog::moveUp() {
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if (_selection < 0) {
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setSelection(_popUpBoss->_entries.size() - 1);
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} else if (_selection > 0) {
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int item = _selection;
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do {
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item--;
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} while (item >= 0 && _popUpBoss->_entries[item].name.size() == 0);
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if (item >= 0)
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setSelection(item);
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}
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}
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void PopUpDialog::moveDown() {
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int lastItem = _popUpBoss->_entries.size() - 1;
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if (_selection < 0) {
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setSelection(0);
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} else if (_selection < lastItem) {
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int item = _selection;
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do {
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item++;
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} while (item <= lastItem && _popUpBoss->_entries[item].name.size() == 0);
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if (item <= lastItem)
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setSelection(item);
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}
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}
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void PopUpDialog::drawMenuEntry(int entry, bool hilite) {
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// Draw one entry of the popup menu, including selection
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assert(entry >= 0);
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int x, y, w;
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if (_twoColumns) {
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int n = _popUpBoss->_entries.size() / 2;
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if (_popUpBoss->_entries.size() & 1)
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n++;
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if (entry >= n) {
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x = _x + 1 + _w / 2;
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y = _y + 1 + kLineHeight * (entry - n);
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} else {
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x = _x + 1;
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y = _y + 1 + kLineHeight * entry;
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}
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w = _w / 2 - 1;
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} else {
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x = _x + 1;
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y = _y + 1 + kLineHeight * entry;
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w = _w - 2;
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}
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Common::String &name(_popUpBoss->_entries[entry].name);
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if (name.size() == 0) {
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// Draw a separator
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g_gui.theme()->drawLineSeparator(Common::Rect(x, y, x+w, y+kLineHeight));
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} else {
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g_gui.theme()->drawText(Common::Rect(x+1, y+2, x+w, y+2+kLineHeight), name, hilite ? Theme::kStateHighlight : Theme::kStateEnabled,
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Theme::kTextAlignLeft, false, _leftPadding);
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}
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}
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#pragma mark -
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//
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// PopUpWidget
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//
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PopUpWidget::PopUpWidget(GuiObject *boss, const String &name, const String &label, uint labelWidth)
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: Widget(boss, name), CommandSender(boss), _label(label), _labelWidth(labelWidth) {
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setFlags(WIDGET_ENABLED | WIDGET_CLEARBG | WIDGET_RETAIN_FOCUS);
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setHints(THEME_HINT_SAVE_BACKGROUND);
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_type = kPopUpWidget;
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_selectedItem = -1;
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if (!_label.empty() && _labelWidth == 0)
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_labelWidth = g_gui.getStringWidth(_label);
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}
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void PopUpWidget::handleMouseDown(int x, int y, int button, int clickCount) {
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if (isEnabled()) {
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PopUpDialog popupDialog(this, x + getAbsX(), y + getAbsY());
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int newSel = popupDialog.runModal();
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if (newSel != -1 && _selectedItem != newSel) {
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_selectedItem = newSel;
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sendCommand(kPopUpItemSelectedCmd, _entries[_selectedItem].tag);
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}
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g_gui.clearDragWidget();
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}
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}
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void PopUpWidget::reflowLayout() {
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_leftPadding = g_gui.evaluator()->getVar("PopUpWidget.leftPadding", 0);
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_rightPadding = g_gui.evaluator()->getVar("PopUpWidget.rightPadding", 0);
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_labelSpacing = g_gui.evaluator()->getVar("PopUpWidget.labelSpacing", 0);
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Widget::reflowLayout();
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}
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void PopUpWidget::appendEntry(const String &entry, uint32 tag) {
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Entry e;
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e.name = entry;
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e.tag = tag;
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_entries.push_back(e);
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}
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void PopUpWidget::clearEntries() {
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_entries.clear();
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_selectedItem = -1;
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}
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void PopUpWidget::setSelected(int item) {
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if (item != _selectedItem) {
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if (item >= 0 && item < (int)_entries.size()) {
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_selectedItem = item;
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} else {
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_selectedItem = -1;
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}
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}
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}
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void PopUpWidget::setSelectedTag(uint32 tag) {
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uint item;
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for (item = 0; item < _entries.size(); ++item) {
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if (_entries[item].tag == tag) {
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setSelected(item);
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return;
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}
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}
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}
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void PopUpWidget::drawWidget() {
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int x = _x + _labelWidth + _labelSpacing;
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int w = _w - _labelWidth - _labelSpacing;
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// Draw the label, if any
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if (_labelWidth > 0)
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g_gui.theme()->drawText(Common::Rect(_x+2,_y+3,_x+2+_labelWidth, _y+3+g_gui.theme()->getFontHeight()), _label, _state, Theme::kTextAlignRight);
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Common::String sel;
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if (_selectedItem >= 0)
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sel = _entries[_selectedItem].name;
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g_gui.theme()->drawPopUpWidget(Common::Rect(x, _y, x+w, _y+_h), sel, _leftPadding, _state, g_gui.theme()->convertAligment(kTextAlignLeft));
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}
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} // End of namespace GUI
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