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engines/hpl1/engine/gui/WidgetListBox.cpp
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267
engines/hpl1/engine/gui/WidgetListBox.cpp
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/* 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (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, see <http://www.gnu.org/licenses/>.
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*
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*/
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/*
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* Copyright (C) 2006-2010 - Frictional Games
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*
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* This file is part of HPL1 Engine.
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*/
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#include "hpl1/engine/gui/WidgetListBox.h"
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#include "hpl1/engine/system/low_level_system.h"
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#include "hpl1/engine/math/Math.h"
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#include "hpl1/engine/gui/Gui.h"
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#include "hpl1/engine/gui/GuiGfxElement.h"
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#include "hpl1/engine/gui/GuiSet.h"
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#include "hpl1/engine/gui/GuiSkin.h"
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#include "hpl1/engine/gui/WidgetSlider.h"
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namespace hpl {
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//////////////////////////////////////////////////////////////////////////
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// CONSTRUCTORS
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//////////////////////////////////////////////////////////////////////////
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//-----------------------------------------------------------------------
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cWidgetListBox::cWidgetListBox(cGuiSet *apSet, cGuiSkin *apSkin) : iWidget(eWidgetType_ListBox, apSet, apSkin) {
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mbClipsGraphics = true;
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mfBackgroundZ = -0.5;
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mlFirstItem = 0;
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mlMaxItems = 1;
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mlSelectedItem = -1;
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mfSliderWidth = mpSkin->GetAttribute(eGuiSkinAttribute_ListBoxSliderWidth).x;
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mpSlider = NULL;
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}
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//-----------------------------------------------------------------------
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cWidgetListBox::~cWidgetListBox() {
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if (mpSet->IsDestroyingSet() == false) {
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mpSet->DestroyWidget(mpSlider);
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}
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}
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//-----------------------------------------------------------------------
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//////////////////////////////////////////////////////////////////////////
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// PUBLIC METHODS
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//////////////////////////////////////////////////////////////////////////
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void cWidgetListBox::SetSelectedItem(int alX, bool abMoveList) {
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if (mlSelectedItem == alX)
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return;
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mlSelectedItem = alX;
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if (abMoveList && mlSelectedItem >= mlFirstItem + mlMaxItems) {
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while (mlSelectedItem >= mlFirstItem + mlMaxItems) {
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mlFirstItem++;
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}
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mpSlider->SetValue(mlFirstItem);
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}
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if (abMoveList && mlSelectedItem < mlFirstItem && mlSelectedItem >= 0) {
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while (mlSelectedItem < mlFirstItem) {
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mlFirstItem--;
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}
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mpSlider->SetValue(mlSelectedItem);
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}
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cGuiMessageData data = cGuiMessageData(mlSelectedItem);
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ProcessMessage(eGuiMessage_SelectionChange, data);
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}
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//-----------------------------------------------------------------------
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//////////////////////////////////////////////////////////////////////////
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// PROTECTED METHODS
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//////////////////////////////////////////////////////////////////////////
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bool cWidgetListBox::DrawText(iWidget *apWidget, cGuiMessageData &aData) {
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cVector3f vPosition = GetGlobalPosition() + cVector3f(3, 2, 0);
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for (int i = mlFirstItem; i < (int)mvItems.size(); ++i) {
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if (i - mlFirstItem > mlMaxItems)
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break;
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if (i == mlSelectedItem) {
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mpSet->DrawGfx(mpGfxSelection, vPosition - cVector3f(3, 0, 0),
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cVector2f(mvSize.x, mvDefaultFontSize.y));
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}
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DrawDefaultText(mvItems[i], vPosition, eFontAlign_Left);
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vPosition.y += mvDefaultFontSize.y + 2;
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}
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return true;
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}
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kGuiCalllbackDeclaredFuncEnd(cWidgetListBox, DrawText)
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//-----------------------------------------------------------------------
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bool cWidgetListBox::MoveSlider(iWidget *apWidget, cGuiMessageData &aData) {
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mlFirstItem = aData.mlVal;
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return true;
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}
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kGuiCalllbackDeclaredFuncEnd(cWidgetListBox, MoveSlider)
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//-----------------------------------------------------------------------
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void cWidgetListBox::UpdateProperties() {
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mlMaxItems = (int)(mvSize.y / (mvDefaultFontSize.y + 2));
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if ((int)mvItems.size() > mlMaxItems) {
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mpSlider->SetBarValueSize(mlMaxItems);
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mpSlider->SetMaxValue((int)mvItems.size() - mlMaxItems);
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} else {
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mpSlider->SetMaxValue(0);
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mpSlider->SetBarValueSize(1);
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}
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}
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//-----------------------------------------------------------------------
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void cWidgetListBox::OnInit() {
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mpSlider = mpSet->CreateWidgetSlider(eWidgetSliderOrientation_Vertical, 0, 0, 0, this);
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mpSlider->AddCallback(eGuiMessage_SliderMove, this, kGuiCallback(MoveSlider));
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AddCallback(eGuiMessage_OnDraw, this, kGuiCallback(DrawText));
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OnChangeSize();
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}
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//-----------------------------------------------------------------------
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void cWidgetListBox::OnChangeSize() {
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if (mpSlider) {
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mpSlider->SetSize(cVector2f(mfSliderWidth, mvSize.y));
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mpSlider->SetPosition(cVector3f(mvSize.x - mfSliderWidth, 0, 0.2f));
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UpdateProperties();
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}
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}
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//-----------------------------------------------------------------------
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void cWidgetListBox::OnLoadGraphics() {
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mpGfxBackground = mpSkin->GetGfx(eGuiSkinGfx_ListBoxBackground);
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mpGfxSelection = mpSkin->GetGfx(eGuiSkinGfx_TextBoxSelectedTextBack);
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mvGfxBorders[0] = mpSkin->GetGfx(eGuiSkinGfx_FrameBorderRight);
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mvGfxBorders[1] = mpSkin->GetGfx(eGuiSkinGfx_FrameBorderLeft);
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mvGfxBorders[2] = mpSkin->GetGfx(eGuiSkinGfx_FrameBorderUp);
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mvGfxBorders[3] = mpSkin->GetGfx(eGuiSkinGfx_FrameBorderDown);
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mvGfxCorners[0] = mpSkin->GetGfx(eGuiSkinGfx_FrameCornerLU);
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mvGfxCorners[1] = mpSkin->GetGfx(eGuiSkinGfx_FrameCornerRU);
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mvGfxCorners[2] = mpSkin->GetGfx(eGuiSkinGfx_FrameCornerRD);
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mvGfxCorners[3] = mpSkin->GetGfx(eGuiSkinGfx_FrameCornerLD);
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}
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//-----------------------------------------------------------------------
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void cWidgetListBox::OnDraw(float afTimeStep, cGuiClipRegion *apClipRegion) {
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////////////////////////////////
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// Background
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mpSet->DrawGfx(mpGfxBackground, GetGlobalPosition() + cVector3f(0, 0, mfBackgroundZ),
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mvSize);
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////////////////////////////////
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// Borders
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DrawBordersAndCorners(NULL, mvGfxBorders, mvGfxCorners,
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GetGlobalPosition() -
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cVector3f(mvGfxCorners[0]->GetActiveSize().x,
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mvGfxCorners[0]->GetActiveSize().y, 0),
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mvSize + mvGfxCorners[0]->GetActiveSize() +
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mvGfxCorners[2]->GetActiveSize());
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}
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//-----------------------------------------------------------------------
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bool cWidgetListBox::OnMouseMove(cGuiMessageData &aData) {
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return true;
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}
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//-----------------------------------------------------------------------
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bool cWidgetListBox::OnMouseDown(cGuiMessageData &aData) {
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cVector3f vLocalPos = WorldToLocalPosition(aData.mvPos);
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int lSelection = (int)((vLocalPos.y - 2) / (mvDefaultFontSize.y + 2));
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if (lSelection < 0)
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lSelection = 0;
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lSelection = lSelection + mlFirstItem;
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if (lSelection >= (int)mvItems.size())
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lSelection = (int)mvItems.size() - 1;
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SetSelectedItem(lSelection);
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return true;
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}
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//-----------------------------------------------------------------------
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bool cWidgetListBox::OnMouseUp(cGuiMessageData &aData) {
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return true;
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}
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//-----------------------------------------------------------------------
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bool cWidgetListBox::OnMouseEnter(cGuiMessageData &aData) {
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return false;
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}
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//-----------------------------------------------------------------------
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bool cWidgetListBox::OnMouseLeave(cGuiMessageData &aData) {
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return false;
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}
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//-----------------------------------------------------------------------
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bool cWidgetListBox::OnKeyPress(cGuiMessageData &aData) {
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auto key = aData.mKeyPress.keycode;
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if (key == Common::KEYCODE_UP) {
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if (mlSelectedItem > 0)
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SetSelectedItem(mlSelectedItem - 1, true);
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} else if (key == Common::KEYCODE_DOWN) {
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if (mlSelectedItem < (int)mvItems.size() - 1)
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SetSelectedItem(mlSelectedItem + 1, true);
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}
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return true;
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}
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//-----------------------------------------------------------------------
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} // namespace hpl
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