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godot/scene/gui/line_edit.cpp
Juan Linietsky 0b806ee0fc GODOT IS OPEN SOURCE
2014-02-09 22:10:30 -03:00

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/*************************************************************************/
/* line_edit.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "line_edit.h"
#include "os/keyboard.h"
#include "os/os.h"
#include "print_string.h"
#include "label.h"
void LineEdit::_input_event(InputEvent p_event) {
switch(p_event.type) {
case InputEvent::MOUSE_BUTTON: {
const InputEventMouseButton &b = p_event.mouse_button;
if (b.button_index!=1)
break;
if (b.pressed) {
set_cursor_at_pixel_pos(b.x);
if (b.doubleclick) {
selection.enabled=true;
selection.begin=0;
selection.end=text.length();
selection.doubleclick=true;
}
selection.drag_attempt=false;
if ((cursor_pos<selection.begin) || (cursor_pos>selection.end) || !selection.enabled) {
selection_clear();
selection.cursor_start=cursor_pos;
selection.creating=true;
} else if (selection.enabled) {
selection.drag_attempt=true;
}
// if (!editable)
// non_editable_clicked_signal.call();
update();
} else {
if ( (!selection.creating) && (!selection.doubleclick)) {
selection_clear();
}
selection.creating=false;
selection.doubleclick=false;
}
update();
} break;
case InputEvent::MOUSE_MOTION: {
const InputEventMouseMotion& m=p_event.mouse_motion;
if (m.button_mask&1) {
if (selection.creating) {
set_cursor_at_pixel_pos(m.x);
selection_fill_at_cursor();
}
}
} break;
case InputEvent::KEY: {
const InputEventKey &k =p_event.key;
if (!k.pressed)
return;
unsigned int code = k.scancode;
if (k.mod.command) {
bool handled=true;
switch (code) {
case (KEY_X): { // CUT
if(k.mod.command && editable) {
cut_text();
}
} break;
case (KEY_C): { // COPY
if(k.mod.command) {
copy_text();
}
} break;
case (KEY_V): { // PASTE
if(k.mod.command && editable) {
paste_text();
}
} break;
case (KEY_Z): { // Simple One level undo
if( k.mod.command && editable) {
int old_cursor_pos = cursor_pos;
text = undo_text;
if(old_cursor_pos > text.length()) {
set_cursor_pos(text.length());
} else {
set_cursor_pos(old_cursor_pos);
}
}
emit_signal("text_changed",text);
_change_notify("text");
} break;
case (KEY_U): { // Delete from start to cursor
if( k.mod.command && editable) {
selection_clear();
undo_text = text;
text = text.substr(cursor_pos,text.length()-cursor_pos);
set_cursor_pos(0);
emit_signal("text_changed",text);
_change_notify("text");
}
} break;
case (KEY_Y): { // PASTE (Yank for unix users)
if(k.mod.command && editable) {
paste_text();
}
} break;
case (KEY_K): { // Delete from cursor_pos to end
if(k.mod.command && editable) {
selection_clear();
undo_text = text;
text = text.substr(0,cursor_pos);
emit_signal("text_changed",text);
_change_notify("text");
}
} break;
default: { handled=false;}
}
if (handled) {
accept_event();
return;
}
}
if (!k.mod.alt && !k.mod.meta && !k.mod.command) {
bool handled=true;
switch (code) {
case KEY_ENTER:
case KEY_RETURN: {
emit_signal( "text_entered",text );
return;
} break;
case KEY_BACKSPACE: {
if (editable) {
undo_text = text;
if (selection.enabled)
selection_delete();
else
delete_char();
}
} break;
case KEY_LEFT: {
shift_selection_check_pre(k.mod.shift);
set_cursor_pos(get_cursor_pos()-1);
shift_selection_check_post(k.mod.shift);
} break;
case KEY_RIGHT: {
shift_selection_check_pre(k.mod.shift);
set_cursor_pos(get_cursor_pos()+1);
shift_selection_check_post(k.mod.shift);
} break;
case KEY_DELETE: {
if (editable) {
undo_text = text;
if (selection.enabled)
selection_delete();
else if (cursor_pos<text.length()) {
set_cursor_pos(get_cursor_pos()+1);
delete_char();
}
}
} break;
case KEY_HOME: {
shift_selection_check_pre(k.mod.shift);
set_cursor_pos(0);
shift_selection_check_post(k.mod.shift);
} break;
case KEY_END: {
shift_selection_check_pre(k.mod.shift);
set_cursor_pos(text.length());
shift_selection_check_post(k.mod.shift);
} break;
default: {
if (k.unicode>=32 && k.scancode!=KEY_DELETE) {
if (editable) {
selection_delete();
CharType ucodestr[2]={k.unicode,0};
append_at_cursor(ucodestr);
emit_signal("text_changed",text);
_change_notify("text");
}
} else {
handled=false;
}
} break;
}
if (handled)
accept_event();
else
return;
selection.old_shift=k.mod.shift;
update();
}
return;
} break;
}
}
Variant LineEdit::get_drag_data(const Point2& p_point) {
if (selection.drag_attempt && selection.enabled) {
String t = text.substr(selection.begin, selection.end - selection.begin);
Label *l = memnew( Label );
l->set_text(t);
set_drag_preview(l);
return t;
}
return Variant();
}
bool LineEdit::can_drop_data(const Point2& p_point,const Variant& p_data) const{
return p_data.get_type()==Variant::STRING;
}
void LineEdit::drop_data(const Point2& p_point,const Variant& p_data){
if (p_data.get_type()==Variant::STRING) {
set_cursor_at_pixel_pos(p_point.x);
append_at_cursor(p_data);
}
}
void LineEdit::_notification(int p_what) {
switch(p_what) {
case NOTIFICATION_RESIZED: {
set_cursor_pos( get_cursor_pos() );
} break;
case NOTIFICATION_DRAW: {
int width,height;
Size2 size=get_size();
width=size.width;
height=size.height;
RID ci = get_canvas_item();
Ref<StyleBox> style = get_stylebox("normal");
if (!is_editable())
style=get_stylebox("read_only");
Ref<Font> font=get_font("font");
style->draw( ci, Rect2( Point2(), size ) );
if (has_focus()) {
get_stylebox("focus")->draw( ci, Rect2( Point2(), size ) );
}
int ofs=style->get_offset().x;
int ofs_max=width-style->get_minimum_size().width;
int char_ofs=window_pos;
int y_area=height-style->get_minimum_size().height;
int y_ofs=style->get_offset().y;
int font_ascent=font->get_ascent();
Color selection_color=get_color("selection_color");
Color font_color=get_color("font_color");
Color font_color_selected=get_color("font_color_selected");
Color cursor_color=get_color("cursor_color");
while(true) {
//end of string, break!
if (char_ofs>=text.length())
break;
CharType cchar=pass?'*':text[char_ofs];
CharType next=pass?'*':text[char_ofs+1];
int char_width=font->get_char_size( cchar,next ).width;
// end of widget, break!
if ( (ofs+char_width) > ofs_max )
break;
bool selected=selection.enabled && char_ofs>=selection.begin && char_ofs<selection.end;
if (selected)
VisualServer::get_singleton()->canvas_item_add_rect(ci,Rect2( Point2( ofs , y_ofs ),Size2( char_width, y_area )),selection_color);
font->draw_char(ci,Point2( ofs , y_ofs+font_ascent ), cchar, next,selected?font_color_selected:font_color );
if (char_ofs==cursor_pos && has_focus())
VisualServer::get_singleton()->canvas_item_add_rect(ci, Rect2(
Point2( ofs , y_ofs ), Size2( 1, y_area ) ), cursor_color );
ofs+=char_width;
char_ofs++;
}
if (char_ofs==cursor_pos && has_focus()) //may be at the end
VisualServer::get_singleton()->canvas_item_add_rect(ci, Rect2(
Point2( ofs , y_ofs ), Size2( 1, y_area ) ), cursor_color );
} break;
case NOTIFICATION_FOCUS_ENTER: {
if (OS::get_singleton()->has_virtual_keyboard())
OS::get_singleton()->show_virtual_keyboard(get_text(),get_global_rect());
} break;
case NOTIFICATION_FOCUS_EXIT: {
if (OS::get_singleton()->has_virtual_keyboard())
OS::get_singleton()->hide_virtual_keyboard();
} break;
}
}
void LineEdit::copy_text() {
if(selection.enabled) {
OS::get_singleton()->set_clipboard(text.substr(selection.begin, selection.end - selection.begin));
}
}
void LineEdit::cut_text() {
if(selection.enabled) {
undo_text = text;
OS::get_singleton()->set_clipboard(text.substr(selection.begin, selection.end - selection.begin));
selection_delete();
}
}
void LineEdit::paste_text() {
String paste_buffer = OS::get_singleton()->get_clipboard();
if(paste_buffer != "") {
if(selection.enabled) selection_delete();
append_at_cursor(paste_buffer);
emit_signal("text_changed",text);
_change_notify("text");
}
}
void LineEdit::shift_selection_check_pre(bool p_shift) {
if (!selection.old_shift && p_shift) {
selection.cursor_start=cursor_pos;
}
if (!p_shift)
selection_clear();
}
void LineEdit::shift_selection_check_post(bool p_shift) {
if (p_shift)
selection_fill_at_cursor();
}
void LineEdit::set_cursor_at_pixel_pos(int p_x) {
int ofs=window_pos;
int pixel_ofs=get_stylebox("normal")->get_offset().x;
Ref<Font> font=get_font("font");
while (ofs<text.length()) {
int char_w=font->get_char_size( text[ofs] ).width;
pixel_ofs+=char_w;
if (pixel_ofs > p_x) { //found what we look for
if ( (pixel_ofs-p_x) < (char_w >> 1 ) ) {
ofs+=1;
}
break;
}
ofs++;
}
set_cursor_pos( ofs );
/*
int new_cursor_pos=p_x;
int charwidth=draw_area->get_font_char_width(' ',0);
new_cursor_pos=( ( (new_cursor_pos-2)+ (charwidth/2) ) /charwidth );
if (new_cursor_pos>(int)text.length()) new_cursor_pos=text.length();
set_cursor_pos(window_pos+new_cursor_pos); */
}
void LineEdit::delete_char() {
if ((text.length()<=0) || (cursor_pos==0)) return;
text.erase( cursor_pos-1, 1 );
set_cursor_pos(get_cursor_pos()-1);
if (cursor_pos==window_pos) {
// set_window_pos(cursor_pos-get_window_length());
}
emit_signal("text_changed",text);
_change_notify("text");
}
void LineEdit::set_text(String p_text) {
clear_internal();
append_at_cursor(p_text);
update();
cursor_pos=0;
window_pos=0;
}
void LineEdit::clear() {
clear_internal();
}
String LineEdit::get_text() const {
return text;
}
void LineEdit::set_cursor_pos(int p_pos) {
if (p_pos>(int)text.length())
p_pos=text.length();
if(p_pos<0)
p_pos=0;
cursor_pos=p_pos;
// if (cursor_pos>(window_pos+get_window_length())) {
// set_window_pos(cursor_pos-get_window_lengt//h());
// }
if (!is_inside_scene()) {
window_pos=cursor_pos;
return;
}
Ref<StyleBox> style = get_stylebox("normal");
Ref<Font> font=get_font("font");
if (cursor_pos<window_pos) {
/* Adjust window if cursor goes too much to the left */
set_window_pos(cursor_pos);
} else if (cursor_pos>window_pos) {
/* Adjust window if cursor goes too much to the right */
int window_width=get_size().width-style->get_minimum_size().width;
if (window_width<0)
return;
int width_to_cursor=0;
int wp=window_pos;
for (int i=window_pos;i<cursor_pos;i++)
width_to_cursor+=font->get_char_size( text[i] ).width;
while(width_to_cursor>=window_width && wp<text.length()) {
width_to_cursor-=font->get_char_size( text[ wp ] ).width;
wp++;
}
if (wp!=window_pos)
set_window_pos( wp );
}
update();
}
int LineEdit::get_cursor_pos() const {
return cursor_pos;
}
void LineEdit::set_window_pos(int p_pos) {
window_pos=p_pos;
if (window_pos<0) window_pos=0;
}
void LineEdit::append_at_cursor(String p_text) {
if ( ( max_length <= 0 ) || (text.length()+p_text.length() <= max_length)) {
undo_text = text;
String pre = text.substr( 0, cursor_pos );
String post = text.substr( cursor_pos, text.length()-cursor_pos );
text=pre+p_text+post;
set_cursor_pos(cursor_pos+p_text.length());
}
}
void LineEdit::clear_internal() {
cursor_pos=0;
window_pos=0;
undo_text="";
text="";
update();
}
Size2 LineEdit::get_minimum_size() const {
Ref<StyleBox> style = get_stylebox("normal");
Ref<Font> font=get_font("font");
Size2 min=style->get_minimum_size();
min.height+=font->get_height();
min.width+=get_constant("minimum_spaces")*font->get_char_size(' ').x;
return min;
}
/* selection */
void LineEdit::selection_clear() {
selection.begin=0;
selection.end=0;
selection.cursor_start=0;
selection.enabled=false;
selection.creating=false;
selection.old_shift=false;
selection.doubleclick=false;
update();
}
void LineEdit::selection_delete() {
if (selection.enabled) {
undo_text = text;
text.erase(selection.begin,selection.end-selection.begin);
if (cursor_pos>=text.length()) {
cursor_pos=text.length();
}
if (window_pos>cursor_pos) {
window_pos=cursor_pos;
}
emit_signal("text_changed",text);
_change_notify("text");
};
selection_clear();
}
void LineEdit::set_max_length(int p_max_length) {
ERR_FAIL_COND(p_max_length<0);
max_length = p_max_length;
set_text(text);
}
int LineEdit::get_max_length() const {
return max_length;
}
void LineEdit::selection_fill_at_cursor() {
int aux;
selection.begin=cursor_pos;
selection.end=selection.cursor_start;
if (selection.end<selection.begin) {
aux=selection.end;
selection.end=selection.begin;
selection.begin=aux;
}
selection.enabled=(selection.begin!=selection.end);
}
void LineEdit::select_all() {
if (!text.length())
return;
selection.begin=0;
selection.end=text.length();
selection.enabled=true;
update();
}
void LineEdit::set_editable(bool p_editable) {
editable=p_editable;
update();
}
bool LineEdit::is_editable() const {
return editable;
}
void LineEdit::set_secret(bool p_secret) {
pass=p_secret;
update();
}
bool LineEdit::is_secret() const {
return pass;
}
void LineEdit::select(int p_from, int p_to) {
int len = text.length();
if (p_from<0)
p_from=0;
if (p_from>len)
p_from=len;
if (p_to<0 || p_to>len)
p_to=len;
if (p_from>=p_to)
return;
selection.enabled=true;
selection.begin=p_from;
selection.end=p_to;
selection.creating=false;
selection.old_shift=false;
selection.doubleclick=false;
update();
}
void LineEdit::_bind_methods() {
ObjectTypeDB::bind_method(_MD("_input_event"),&LineEdit::_input_event);
ObjectTypeDB::bind_method(_MD("clear"),&LineEdit::clear);
ObjectTypeDB::bind_method(_MD("select_all"),&LineEdit::select_all);
ObjectTypeDB::bind_method(_MD("set_text","text"),&LineEdit::set_text);
ObjectTypeDB::bind_method(_MD("get_text"),&LineEdit::get_text);
ObjectTypeDB::bind_method(_MD("set_cursor_pos","pos"),&LineEdit::set_cursor_pos);
ObjectTypeDB::bind_method(_MD("get_cursor_pos"),&LineEdit::get_cursor_pos);
ObjectTypeDB::bind_method(_MD("set_max_length","chars"),&LineEdit::set_max_length);
ObjectTypeDB::bind_method(_MD("get_max_length"),&LineEdit::get_max_length);
ObjectTypeDB::bind_method(_MD("append_at_cursor","text"),&LineEdit::append_at_cursor);
ObjectTypeDB::bind_method(_MD("set_editable","enabled"),&LineEdit::set_editable);
ObjectTypeDB::bind_method(_MD("is_editable"),&LineEdit::is_editable);
ObjectTypeDB::bind_method(_MD("set_secret","enabled"),&LineEdit::set_secret);
ObjectTypeDB::bind_method(_MD("is_secret"),&LineEdit::is_secret);
ObjectTypeDB::bind_method(_MD("select","from","to"),&LineEdit::is_secret,DEFVAL(0),DEFVAL(-1));
ADD_SIGNAL( MethodInfo("text_changed", PropertyInfo( Variant::STRING, "text" )) );
ADD_SIGNAL( MethodInfo("text_entered", PropertyInfo( Variant::STRING, "text" )) );
ADD_PROPERTY( PropertyInfo( Variant::STRING, "text" ), _SCS("set_text"),_SCS("get_text") );
ADD_PROPERTY( PropertyInfo( Variant::INT, "max_length" ), _SCS("set_max_length"),_SCS("get_max_length") );
ADD_PROPERTY( PropertyInfo( Variant::BOOL, "editable" ), _SCS("set_editable"),_SCS("is_editable") );
ADD_PROPERTY( PropertyInfo( Variant::BOOL, "secret" ), _SCS("set_secret"),_SCS("is_secret") );
}
LineEdit::LineEdit() {
cursor_pos=0;
window_pos=0;
max_length = 0;
pass=false;
selection_clear();
set_focus_mode( FOCUS_ALL );
editable=true;
set_default_cursor_shape(CURSOR_IBEAM);
set_stop_mouse(true);
}
LineEdit::~LineEdit() {
}
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