minetest/src/touchscreengui.cpp

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/*
Copyright (C) 2014 sapier
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser 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.
*/
#include "touchscreengui.h"
#include "irrlichttypes.h"
#include "irr_v2d.h"
#include "log.h"
#include "keycode.h"
#include "settings.h"
#include "gettime.h"
#include "util/numeric.h"
#include "porting.h"
#include <iostream>
#include <algorithm>
#include <ISceneCollisionManager.h>
using namespace irr::core;
extern Settings *g_settings;
const char** touchgui_button_imagenames = (const char*[]) {
"up_arrow.png",
"down_arrow.png",
"left_arrow.png",
"right_arrow.png",
"inventory_btn.png",
"drop_btn.png",
"jump_btn.png",
"down.png",
"fly_btn.png",
"noclip_btn.png",
"fast_btn.png",
"debug_btn.png",
"chat_btn.png",
"camera_btn.png",
"rangeview_btn.png"
};
static irr::EKEY_CODE id2keycode(touch_gui_button_id id)
{
std::string key = "";
switch (id) {
case forward_id:
key = "forward";
break;
case left_id:
key = "left";
break;
case right_id:
key = "right";
break;
case backward_id:
key = "backward";
break;
case inventory_id:
key = "inventory";
break;
case drop_id:
key = "drop";
break;
case jump_id:
key = "jump";
break;
case crunch_id:
key = "sneak";
break;
case fly_id:
key = "freemove";
break;
case noclip_id:
key = "noclip";
break;
case fast_id:
key = "fastmove";
break;
case debug_id:
key = "toggle_debug";
break;
case chat_id:
key = "chat";
break;
case camera_id:
key = "camera_mode";
break;
case range_id:
key = "rangeselect";
break;
}
assert(key != "");
return keyname_to_keycode(g_settings->get("keymap_" + key).c_str());
}
TouchScreenGUI *g_touchscreengui;
TouchScreenGUI::TouchScreenGUI(IrrlichtDevice *device, IEventReceiver* receiver):
m_device(device),
m_guienv(device->getGUIEnvironment()),
m_camera_yaw(0.0),
m_camera_pitch(0.0),
m_visible(false),
m_move_id(-1),
m_receiver(receiver)
{
for (unsigned int i=0; i < after_last_element_id; i++) {
m_buttons[i].guibutton = 0;
m_buttons[i].repeatcounter = -1;
}
m_screensize = m_device->getVideoDriver()->getScreenSize();
}
void TouchScreenGUI::loadButtonTexture(button_info* btn, const char* path)
{
unsigned int tid;
video::ITexture *texture = m_texturesource->getTexture(path,&tid);
if (texture) {
btn->guibutton->setUseAlphaChannel(true);
btn->guibutton->setImage(texture);
btn->guibutton->setPressedImage(texture);
btn->guibutton->setScaleImage(true);
btn->guibutton->setDrawBorder(false);
btn->guibutton->setText(L"");
}
}
void TouchScreenGUI::initButton(touch_gui_button_id id, rect<s32> button_rect,
std::wstring caption, bool immediate_release )
{
button_info* btn = &m_buttons[id];
btn->guibutton = m_guienv->addButton(button_rect, 0, id, caption.c_str());
btn->guibutton->grab();
btn->repeatcounter = -1;
btn->keycode = id2keycode(id);
btn->immediate_release = immediate_release;
btn->ids.clear();
loadButtonTexture(btn,touchgui_button_imagenames[id]);
}
static int getMaxControlPadSize(float density) {
return 200 * density * g_settings->getFloat("gui_scaling");
}
void TouchScreenGUI::init(ISimpleTextureSource* tsrc, float density)
{
assert(tsrc != 0);
u32 control_pad_size =
MYMIN((2 * m_screensize.Y) / 3,getMaxControlPadSize(density));
u32 button_size = control_pad_size / 3;
m_visible = true;
m_texturesource = tsrc;
m_control_pad_rect = rect<s32>(0, m_screensize.Y - 3 * button_size,
3 * button_size, m_screensize.Y);
/*
draw control pad
0 1 2
3 4 5
for now only 0, 1, 2, and 4 are used
*/
int number = 0;
for (int y = 0; y < 2; ++y)
for (int x = 0; x < 3; ++x, ++number) {
rect<s32> button_rect(
x * button_size, m_screensize.Y - button_size * (2 - y),
(x + 1) * button_size, m_screensize.Y - button_size * (1 - y)
);
touch_gui_button_id id = after_last_element_id;
std::wstring caption;
switch (number) {
case 0:
id = left_id;
caption = L"<";
break;
case 1:
id = forward_id;
caption = L"^";
break;
case 2:
id = right_id;
caption = L">";
break;
case 4:
id = backward_id;
caption = L"v";
break;
}
if (id != after_last_element_id) {
initButton(id, button_rect, caption, false);
}
}
/* init inventory button */
initButton(inventory_id,
rect<s32>(0, m_screensize.Y - (button_size/2),
(button_size/2), m_screensize.Y), L"inv", true);
/* init drop button */
initButton(drop_id,
rect<s32>(2.5*button_size, m_screensize.Y - (button_size/2),
3*button_size, m_screensize.Y), L"drop", true);
/* init jump button */
initButton(jump_id,
rect<s32>(m_screensize.X-(1.75*button_size),
m_screensize.Y - (0.5*button_size),
m_screensize.X-(0.25*button_size),
m_screensize.Y),
L"x",false);
/* init crunch button */
initButton(crunch_id,
rect<s32>(m_screensize.X-(3.25*button_size),
m_screensize.Y - (0.5*button_size),
m_screensize.X-(1.75*button_size),
m_screensize.Y),
L"H",false);
/* init fly button */
initButton(fly_id,
rect<s32>(m_screensize.X - (0.75*button_size),
m_screensize.Y - (2.25*button_size),
m_screensize.X, m_screensize.Y - (button_size*1.5)),
L"fly", true);
/* init noclip button */
initButton(noclip_id,
rect<s32>(m_screensize.X - (0.75*button_size), 2.25*button_size,
m_screensize.X, 3*button_size),
L"clip", true);
/* init fast button */
initButton(fast_id,
rect<s32>(m_screensize.X - (0.75*button_size), 1.5*button_size,
m_screensize.X, 2.25*button_size),
L"fast", true);
/* init debug button */
initButton(debug_id,
rect<s32>(m_screensize.X - (0.75*button_size), 0.75*button_size,
m_screensize.X, 1.5*button_size),
L"dbg", true);
/* init chat button */
initButton(chat_id,
rect<s32>(m_screensize.X - (0.75*button_size), 0,
m_screensize.X, 0.75*button_size),
L"Chat", true);
/* init camera button */
initButton(camera_id,
rect<s32>(m_screensize.X - (1.5*button_size), 0,
m_screensize.X - (0.75*button_size), 0.75*button_size),
L"cam", true);
/* init rangeselect button */
initButton(range_id,
rect<s32>(m_screensize.X - (2.25*button_size), 0,
m_screensize.X - (1.5*button_size), 0.75*button_size),
L"far", true);
}
touch_gui_button_id TouchScreenGUI::getButtonID(s32 x, s32 y)
{
IGUIElement* rootguielement = m_guienv->getRootGUIElement();
if (rootguielement != NULL) {
gui::IGUIElement *element =
rootguielement->getElementFromPoint(core::position2d<s32>(x,y));
if (element) {
for (unsigned int i=0; i < after_last_element_id; i++) {
if (element == m_buttons[i].guibutton) {
return (touch_gui_button_id) i;
}
}
}
}
return after_last_element_id;
}
touch_gui_button_id TouchScreenGUI::getButtonID(int eventID)
{
for (unsigned int i=0; i < after_last_element_id; i++) {
button_info* btn = &m_buttons[i];
std::vector<int>::iterator id =
std::find(btn->ids.begin(),btn->ids.end(), eventID);
if (id != btn->ids.end())
return (touch_gui_button_id) i;
}
return after_last_element_id;
}
bool TouchScreenGUI::isHUDButton(const SEvent &event)
{
// check if hud item is pressed
for (std::map<int,rect<s32> >::iterator iter = m_hud_rects.begin();
iter != m_hud_rects.end(); iter++) {
if (iter->second.isPointInside(
v2s32(event.TouchInput.X,
event.TouchInput.Y)
)) {
if ( iter->first < 8) {
SEvent* translated = new SEvent();
memset(translated,0,sizeof(SEvent));
translated->EventType = irr::EET_KEY_INPUT_EVENT;
translated->KeyInput.Key = (irr::EKEY_CODE) (KEY_KEY_1 + iter->first);
translated->KeyInput.Control = false;
translated->KeyInput.Shift = false;
translated->KeyInput.PressedDown = true;
m_receiver->OnEvent(*translated);
m_hud_ids[event.TouchInput.ID] = translated->KeyInput.Key;
delete translated;
return true;
}
}
}
return false;
}
bool TouchScreenGUI::isReleaseHUDButton(int eventID)
{
std::map<int,irr::EKEY_CODE>::iterator iter = m_hud_ids.find(eventID);
if (iter != m_hud_ids.end()) {
SEvent* translated = new SEvent();
memset(translated,0,sizeof(SEvent));
translated->EventType = irr::EET_KEY_INPUT_EVENT;
translated->KeyInput.Key = iter->second;
translated->KeyInput.PressedDown = false;
translated->KeyInput.Control = false;
translated->KeyInput.Shift = false;
m_receiver->OnEvent(*translated);
m_hud_ids.erase(iter);
delete translated;
return true;
}
return false;
}
void TouchScreenGUI::ButtonEvent(touch_gui_button_id button,
int eventID, bool action)
{
button_info* btn = &m_buttons[button];
SEvent* translated = new SEvent();
memset(translated,0,sizeof(SEvent));
translated->EventType = irr::EET_KEY_INPUT_EVENT;
translated->KeyInput.Key = btn->keycode;
translated->KeyInput.Control = false;
translated->KeyInput.Shift = false;
translated->KeyInput.Char = 0;
/* add this event */
if (action) {
assert(std::find(btn->ids.begin(),btn->ids.end(), eventID) == btn->ids.end());
btn->ids.push_back(eventID);
if (btn->ids.size() > 1) return;
btn->repeatcounter = 0;
translated->KeyInput.PressedDown = true;
translated->KeyInput.Key = btn->keycode;
m_receiver->OnEvent(*translated);
}
/* remove event */
if ((!action) || (btn->immediate_release)) {
std::vector<int>::iterator pos =
std::find(btn->ids.begin(),btn->ids.end(), eventID);
/* has to be in touch list */
assert(pos != btn->ids.end());
btn->ids.erase(pos);
if (btn->ids.size() > 0) { return; }
translated->KeyInput.PressedDown = false;
btn->repeatcounter = -1;
m_receiver->OnEvent(*translated);
}
delete translated;
}
void TouchScreenGUI::translateEvent(const SEvent &event)
{
if (!m_visible) {
infostream << "TouchScreenGUI::translateEvent got event but not visible?!" << std::endl;
return;
}
if (event.EventType != EET_TOUCH_INPUT_EVENT) {
return;
}
if (event.TouchInput.Event == ETIE_PRESSED_DOWN) {
/* add to own copy of eventlist ...
* android would provide this information but irrlicht guys don't
* wanna design a efficient interface
*/
id_status toadd;
toadd.id = event.TouchInput.ID;
toadd.X = event.TouchInput.X;
toadd.Y = event.TouchInput.Y;
m_known_ids.push_back(toadd);
int eventID = event.TouchInput.ID;
touch_gui_button_id button =
getButtonID(event.TouchInput.X, event.TouchInput.Y);
/* handle button events */
if (button != after_last_element_id) {
ButtonEvent(button,eventID,true);
}
else if (isHUDButton(event))
{
/* already handled in isHUDButton() */
}
/* handle non button events */
else {
/* if we don't already have a moving point make this the moving one */
if (m_move_id == -1) {
m_move_id = event.TouchInput.ID;
m_move_has_really_moved = false;
m_move_downtime = getTimeMs();
m_move_downlocation = v2s32(event.TouchInput.X, event.TouchInput.Y);
m_move_sent_as_mouse_event = false;
}
}
m_pointerpos[event.TouchInput.ID] = v2s32(event.TouchInput.X, event.TouchInput.Y);
}
else if (event.TouchInput.Event == ETIE_LEFT_UP) {
verbosestream << "Up event for pointerid: " << event.TouchInput.ID << std::endl;
touch_gui_button_id button = getButtonID(event.TouchInput.ID);
/* handle button events */
if (button != after_last_element_id) {
ButtonEvent(button,event.TouchInput.ID,false);
}
/* handle hud button events */
else if (isReleaseHUDButton(event.TouchInput.ID)) {
/* nothing to do here */
}
/* handle the point used for moving view */
else if (event.TouchInput.ID == m_move_id) {
m_move_id = -1;
/* if this pointer issued a mouse event issue symmetric release here */
if (m_move_sent_as_mouse_event) {
SEvent* translated = new SEvent;
memset(translated,0,sizeof(SEvent));
translated->EventType = EET_MOUSE_INPUT_EVENT;
translated->MouseInput.X = m_move_downlocation.X;
translated->MouseInput.Y = m_move_downlocation.Y;
translated->MouseInput.Shift = false;
translated->MouseInput.Control = false;
translated->MouseInput.ButtonStates = 0;
translated->MouseInput.Event = EMIE_LMOUSE_LEFT_UP;
m_receiver->OnEvent(*translated);
delete translated;
}
else {
/* do double tap detection */
doubleTapDetection();
}
}
else {
infostream
<< "TouchScreenGUI::translateEvent released unknown button: "
<< event.TouchInput.ID << std::endl;
}
for (std::vector<id_status>::iterator iter = m_known_ids.begin();
iter != m_known_ids.end(); iter++) {
if (iter->id == event.TouchInput.ID) {
m_known_ids.erase(iter);
break;
}
}
}
else {
assert(event.TouchInput.Event == ETIE_MOVED);
int move_idx = event.TouchInput.ID;
if (m_pointerpos[event.TouchInput.ID] ==
v2s32(event.TouchInput.X, event.TouchInput.Y)) {
return;
}
if (m_move_id != -1) {
if ((event.TouchInput.ID == m_move_id) &&
(!m_move_sent_as_mouse_event)) {
double distance = sqrt(
(m_pointerpos[event.TouchInput.ID].X - event.TouchInput.X) *
(m_pointerpos[event.TouchInput.ID].X - event.TouchInput.X) +
(m_pointerpos[event.TouchInput.ID].Y - event.TouchInput.Y) *
(m_pointerpos[event.TouchInput.ID].Y - event.TouchInput.Y));
if ((distance > g_settings->getU16("touchscreen_threshold")) ||
(m_move_has_really_moved)) {
m_move_has_really_moved = true;
s32 X = event.TouchInput.X;
s32 Y = event.TouchInput.Y;
// update camera_yaw and camera_pitch
s32 dx = X - m_pointerpos[event.TouchInput.ID].X;
s32 dy = Y - m_pointerpos[event.TouchInput.ID].Y;
/* adapt to similar behaviour as pc screen */
double d = g_settings->getFloat("mouse_sensitivity") *4;
double old_yaw = m_camera_yaw;
double old_pitch = m_camera_pitch;
m_camera_yaw -= dx * d;
m_camera_pitch = MYMIN(MYMAX( m_camera_pitch + (dy * d),-180),180);
while (m_camera_yaw < 0)
m_camera_yaw += 360;
while (m_camera_yaw > 360)
m_camera_yaw -= 360;
// update shootline
m_shootline = m_device
->getSceneManager()
->getSceneCollisionManager()
->getRayFromScreenCoordinates(v2s32(X, Y));
m_pointerpos[event.TouchInput.ID] = v2s32(X, Y);
}
}
else if ((event.TouchInput.ID == m_move_id) &&
(m_move_sent_as_mouse_event)) {
m_shootline = m_device
->getSceneManager()
->getSceneCollisionManager()
->getRayFromScreenCoordinates(
v2s32(event.TouchInput.X,event.TouchInput.Y));
}
}
else {
handleChangedButton(event);
}
}
}
void TouchScreenGUI::handleChangedButton(const SEvent &event)
{
for (unsigned int i = 0; i < after_last_element_id; i++) {
if (m_buttons[i].ids.empty()) {
continue;
}
for(std::vector<int>::iterator iter = m_buttons[i].ids.begin();
iter != m_buttons[i].ids.end(); iter++) {
if (event.TouchInput.ID == *iter) {
int current_button_id =
getButtonID(event.TouchInput.X, event.TouchInput.Y);
if (current_button_id == i) {
continue;
}
/* remove old button */
ButtonEvent((touch_gui_button_id) i,*iter,false);
if (current_button_id == after_last_element_id) {
return;
}
ButtonEvent((touch_gui_button_id) current_button_id,*iter,true);
return;
}
}
}
int current_button_id = getButtonID(event.TouchInput.X, event.TouchInput.Y);
if (current_button_id == after_last_element_id) {
return;
}
button_info* btn = &m_buttons[current_button_id];
if (std::find(btn->ids.begin(),btn->ids.end(), event.TouchInput.ID) == btn->ids.end()) {
ButtonEvent((touch_gui_button_id) current_button_id,event.TouchInput.ID,true);
}
}
bool TouchScreenGUI::doubleTapDetection()
{
m_key_events[0].down_time = m_key_events[1].down_time;
m_key_events[0].x = m_key_events[1].x;
m_key_events[0].y = m_key_events[1].y;
m_key_events[1].down_time = m_move_downtime;
m_key_events[1].x = m_move_downlocation.X;
m_key_events[1].y = m_move_downlocation.Y;
u32 delta = porting::getDeltaMs(m_key_events[0].down_time,getTimeMs());
if (delta > 400)
return false;
double distance = sqrt(
(m_key_events[0].x - m_key_events[1].x) * (m_key_events[0].x - m_key_events[1].x) +
(m_key_events[0].y - m_key_events[1].y) * (m_key_events[0].y - m_key_events[1].y));
if (distance >(20 + g_settings->getU16("touchscreen_threshold")))
return false;
SEvent* translated = new SEvent();
memset(translated,0,sizeof(SEvent));
translated->EventType = EET_MOUSE_INPUT_EVENT;
translated->MouseInput.X = m_key_events[0].x;
translated->MouseInput.Y = m_key_events[0].y;
translated->MouseInput.Shift = false;
translated->MouseInput.Control = false;
translated->MouseInput.ButtonStates = EMBSM_RIGHT;
// update shootline
m_shootline = m_device
->getSceneManager()
->getSceneCollisionManager()
->getRayFromScreenCoordinates(v2s32(m_key_events[0].x, m_key_events[0].y));
translated->MouseInput.Event = EMIE_RMOUSE_PRESSED_DOWN;
verbosestream << "TouchScreenGUI::translateEvent right click press" << std::endl;
m_receiver->OnEvent(*translated);
translated->MouseInput.ButtonStates = 0;
translated->MouseInput.Event = EMIE_RMOUSE_LEFT_UP;
verbosestream << "TouchScreenGUI::translateEvent right click release" << std::endl;
m_receiver->OnEvent(*translated);
delete translated;
return true;
}
TouchScreenGUI::~TouchScreenGUI()
{
for (unsigned int i=0; i < after_last_element_id; i++) {
button_info* btn = &m_buttons[i];
if (btn->guibutton != 0) {
btn->guibutton->drop();
btn->guibutton = NULL;
}
}
}
void TouchScreenGUI::step(float dtime)
{
/* simulate keyboard repeats */
for (unsigned int i=0; i < after_last_element_id; i++) {
button_info* btn = &m_buttons[i];
if (btn->ids.size() > 0) {
btn->repeatcounter += dtime;
/* in case we're moving around digging does not happen */
if (m_move_id != -1)
m_move_has_really_moved = true;
if (btn->repeatcounter < 0.2) continue;
btn->repeatcounter = 0;
SEvent translated;
memset(&translated,0,sizeof(SEvent));
translated.EventType = irr::EET_KEY_INPUT_EVENT;
translated.KeyInput.Key = btn->keycode;
translated.KeyInput.PressedDown = false;
m_receiver->OnEvent(translated);
translated.KeyInput.PressedDown = true;
m_receiver->OnEvent(translated);
}
}
/* if a new placed pointer isn't moved for some time start digging */
if ((m_move_id != -1) &&
(!m_move_has_really_moved) &&
(!m_move_sent_as_mouse_event)) {
u32 delta = porting::getDeltaMs(m_move_downtime,getTimeMs());
if (delta > MIN_DIG_TIME_MS) {
m_shootline = m_device
->getSceneManager()
->getSceneCollisionManager()
->getRayFromScreenCoordinates(
v2s32(m_move_downlocation.X,m_move_downlocation.Y));
SEvent translated;
memset(&translated,0,sizeof(SEvent));
translated.EventType = EET_MOUSE_INPUT_EVENT;
translated.MouseInput.X = m_move_downlocation.X;
translated.MouseInput.Y = m_move_downlocation.Y;
translated.MouseInput.Shift = false;
translated.MouseInput.Control = false;
translated.MouseInput.ButtonStates = EMBSM_LEFT;
translated.MouseInput.Event = EMIE_LMOUSE_PRESSED_DOWN;
verbosestream << "TouchScreenGUI::step left click press" << std::endl;
m_receiver->OnEvent(translated);
m_move_sent_as_mouse_event = true;
}
}
}
void TouchScreenGUI::resetHud()
{
m_hud_rects.clear();
}
void TouchScreenGUI::registerHudItem(int index, const rect<s32> &rect)
{
m_hud_rects[index] = rect;
}
void TouchScreenGUI::Toggle(bool visible)
{
m_visible = visible;
for (unsigned int i=0; i < after_last_element_id; i++) {
button_info* btn = &m_buttons[i];
if (btn->guibutton != 0) {
btn->guibutton->setVisible(visible);
}
}
}
void TouchScreenGUI::Hide()
{
Toggle(false);
}
void TouchScreenGUI::Show()
{
Toggle(true);
}