homebrew_launcher/src/gui/GuiElement.cpp
2016-02-29 22:28:18 +01:00

343 lines
7.5 KiB
C++

/****************************************************************************
* Copyright (C) 2015 Dimok
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
****************************************************************************/
#include "GuiElement.h"
//! TODO remove this!
static int screenwidth = 1280;
static int screenheight = 720;
/**
* Constructor for the Object class.
*/
GuiElement::GuiElement()
{
xoffset = 0.0f;
yoffset = 0.0f;
zoffset = 0.0f;
width = 0.0f;
height = 0.0f;
alpha = 1.0f;
scaleX = 1.0f;
scaleY = 1.0f;
scaleZ = 1.0f;
for(int i = 0; i < 4; i++)
state[i] = STATE_DEFAULT;
stateChan = -1;
parentElement = NULL;
rumble = true;
selectable = false;
clickable = false;
holdable = false;
visible = true;
yoffsetDyn = 0;
xoffsetDyn = 0;
alphaDyn = -1;
scaleDyn = 1;
effects = EFFECT_NONE;
effectAmount = 0;
effectTarget = 0;
effectsOver = EFFECT_NONE;
effectAmountOver = 0;
effectTargetOver = 0;
angle = 0.0f;
// default alignment - align to top left
alignment = (ALIGN_CENTER | ALIGN_MIDDLE);
}
/**
* Get the left position of the GuiElement.
* @see SetLeft()
* @return Left position in pixel.
*/
f32 GuiElement::getLeft()
{
f32 pWidth = 0;
f32 pLeft = 0;
f32 pScaleX = 1.0f;
if(parentElement)
{
pWidth = parentElement->getWidth();
pLeft = parentElement->getLeft();
pScaleX = parentElement->getScaleX();
}
pLeft += xoffsetDyn;
f32 x = pLeft;
//! TODO: the conversion from int to float and back to int is bad for performance, change that
if(alignment & ALIGN_CENTER)
{
x = pLeft + pWidth * 0.5f * pScaleX - width * 0.5f * getScaleX();
}
else if(alignment & ALIGN_RIGHT)
{
x = pLeft + pWidth * pScaleX - width * getScaleX();
}
return x + xoffset;
}
/**
* Get the top position of the GuiElement.
* @see SetTop()
* @return Top position in pixel.
*/
f32 GuiElement::getTop()
{
f32 pHeight = 0;
f32 pTop = 0;
f32 pScaleY = 1.0f;
if(parentElement)
{
pHeight = parentElement->getHeight();
pTop = parentElement->getTop();
pScaleY = parentElement->getScaleY();
}
pTop += yoffsetDyn;
f32 y = pTop;
//! TODO: the conversion from int to float and back to int is bad for performance, change that
if(alignment & ALIGN_MIDDLE)
{
y = pTop + pHeight * 0.5f * pScaleY - height * 0.5f * getScaleY();
}
else if(alignment & ALIGN_BOTTOM)
{
y = pTop + pHeight * pScaleY - height * getScaleY();
}
return y + yoffset;
}
void GuiElement::setEffect(int eff, int amount, int target)
{
if(eff & EFFECT_SLIDE_IN)
{
// these calculations overcompensate a little
if(eff & EFFECT_SLIDE_TOP)
{
if(eff & EFFECT_SLIDE_FROM)
yoffsetDyn = (int) -getHeight()*scaleY;
else
yoffsetDyn = -screenheight;
}
else if(eff & EFFECT_SLIDE_LEFT)
{
if(eff & EFFECT_SLIDE_FROM)
xoffsetDyn = (int) -getWidth()*scaleX;
else
xoffsetDyn = -screenwidth;
}
else if(eff & EFFECT_SLIDE_BOTTOM)
{
if(eff & EFFECT_SLIDE_FROM)
yoffsetDyn = (int) getHeight()*scaleY;
else
yoffsetDyn = screenheight;
}
else if(eff & EFFECT_SLIDE_RIGHT)
{
if(eff & EFFECT_SLIDE_FROM)
xoffsetDyn = (int) getWidth()*scaleX;
else
xoffsetDyn = screenwidth;
}
}
if((eff & EFFECT_FADE) && amount > 0)
{
alphaDyn = 0;
}
else if((eff & EFFECT_FADE) && amount < 0)
{
alphaDyn = alpha;
}
effects |= eff;
effectAmount = amount;
effectTarget = target;
}
//!Sets an effect to be enabled on wiimote cursor over
//!\param e Effect to enable
//!\param a Amount of the effect (usage varies on effect)
//!\param t Target amount of the effect (usage varies on effect)
void GuiElement::setEffectOnOver(int e, int a, int t)
{
effectsOver |= e;
effectAmountOver = a;
effectTargetOver = t;
}
void GuiElement::resetEffects()
{
yoffsetDyn = 0;
xoffsetDyn = 0;
alphaDyn = -1;
scaleDyn = 1;
effects = EFFECT_NONE;
effectAmount = 0;
effectTarget = 0;
effectsOver = EFFECT_NONE;
effectAmountOver = 0;
effectTargetOver = 0;
}
void GuiElement::updateEffects()
{
if(!this->isVisible() && parentElement)
return;
if(effects & (EFFECT_SLIDE_IN | EFFECT_SLIDE_OUT | EFFECT_SLIDE_FROM))
{
if(effects & EFFECT_SLIDE_IN)
{
if(effects & EFFECT_SLIDE_LEFT)
{
xoffsetDyn += effectAmount;
if(xoffsetDyn >= 0)
{
xoffsetDyn = 0;
effects = 0;
effectFinished(this);
}
}
else if(effects & EFFECT_SLIDE_RIGHT)
{
xoffsetDyn -= effectAmount;
if(xoffsetDyn <= 0)
{
xoffsetDyn = 0;
effects = 0;
effectFinished(this);
}
}
else if(effects & EFFECT_SLIDE_TOP)
{
yoffsetDyn += effectAmount;
if(yoffsetDyn >= 0)
{
yoffsetDyn = 0;
effects = 0;
effectFinished(this);
}
}
else if(effects & EFFECT_SLIDE_BOTTOM)
{
yoffsetDyn -= effectAmount;
if(yoffsetDyn <= 0)
{
yoffsetDyn = 0;
effects = 0;
effectFinished(this);
}
}
}
else
{
if(effects & EFFECT_SLIDE_LEFT)
{
xoffsetDyn -= effectAmount;
if(xoffsetDyn <= -screenwidth) {
effects = 0; // shut off effect
effectFinished(this);
}
else if((effects & EFFECT_SLIDE_FROM) && xoffsetDyn <= -getWidth()) {
effects = 0; // shut off effect
effectFinished(this);
}
}
else if(effects & EFFECT_SLIDE_RIGHT)
{
xoffsetDyn += effectAmount;
if(xoffsetDyn >= screenwidth) {
effects = 0; // shut off effect
effectFinished(this);
}
else if((effects & EFFECT_SLIDE_FROM) && xoffsetDyn >= getWidth()*scaleX) {
effects = 0; // shut off effect
effectFinished(this);
}
}
else if(effects & EFFECT_SLIDE_TOP)
{
yoffsetDyn -= effectAmount;
if(yoffsetDyn <= -screenheight) {
effects = 0; // shut off effect
effectFinished(this);
}
else if((effects & EFFECT_SLIDE_FROM) && yoffsetDyn <= -getHeight()) {
effects = 0; // shut off effect
effectFinished(this);
}
}
else if(effects & EFFECT_SLIDE_BOTTOM)
{
yoffsetDyn += effectAmount;
if(yoffsetDyn >= screenheight) {
effects = 0; // shut off effect
effectFinished(this);
}
else if((effects & EFFECT_SLIDE_FROM) && yoffsetDyn >= getHeight()) {
effects = 0; // shut off effect
effectFinished(this);
}
}
}
}
else if(effects & EFFECT_FADE)
{
alphaDyn += effectAmount * (1.0f / 255.0f);
if(effectAmount < 0 && alphaDyn <= 0)
{
alphaDyn = 0;
effects = 0; // shut off effect
effectFinished(this);
}
else if(effectAmount > 0 && alphaDyn >= alpha)
{
alphaDyn = alpha;
effects = 0; // shut off effect
effectFinished(this);
}
}
else if(effects & EFFECT_SCALE)
{
scaleDyn += effectAmount * 0.01f;
if((effectAmount < 0 && scaleDyn <= (effectTarget * 0.01f))
|| (effectAmount > 0 && scaleDyn >= (effectTarget * 0.01f)))
{
scaleDyn = effectTarget * 0.01f;
effects = 0; // shut off effect
effectFinished(this);
}
}
}