330 lines
8.3 KiB
C++
330 lines
8.3 KiB
C++
/*************************************************************************/
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/* box_container.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* http://www.godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "box_container.h"
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#include "margin_container.h"
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#include "label.h"
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struct _MinSizeCache {
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int min_size;
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bool will_stretch;
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int final_size;
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};
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void BoxContainer::_resort() {
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/** First pass, determine minimum size AND amount of stretchable elements */
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Size2i new_size=get_size();
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int sep=get_constant("separation");//,vertical?"VBoxContainer":"HBoxContainer");
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bool first=true;
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int children_count=0;
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int stretch_min=0;
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int stretch_avail=0;
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float stretch_ratio_total=0;
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Map<Control*,_MinSizeCache> min_size_cache;
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for(int i=0;i<get_child_count();i++) {
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Control *c=get_child(i)->cast_to<Control>();
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if (!c || !c->is_visible_in_tree())
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continue;
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if (c->is_set_as_toplevel())
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continue;
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Size2i size=c->get_combined_minimum_size();
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_MinSizeCache msc;
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if (vertical) { /* VERTICAL */
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stretch_min+=size.height;
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msc.min_size=size.height;
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msc.will_stretch=c->get_v_size_flags() & SIZE_EXPAND;
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} else { /* HORIZONTAL */
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stretch_min+=size.width;
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msc.min_size=size.width;
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msc.will_stretch=c->get_h_size_flags() & SIZE_EXPAND;
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}
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if (msc.will_stretch) {
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stretch_avail+=msc.min_size;
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stretch_ratio_total+=c->get_stretch_ratio();
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}
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msc.final_size=msc.min_size;
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min_size_cache[c]=msc;
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children_count++;
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}
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if (children_count==0)
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return;
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int stretch_max = (vertical? new_size.height : new_size.width ) - (children_count-1) * sep;
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int stretch_diff = stretch_max - stretch_min;
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if (stretch_diff<0) {
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//avoid negative stretch space
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stretch_max=stretch_min;
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stretch_diff=0;
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}
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stretch_avail+=stretch_diff; //available stretch space.
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/** Second, pass sucessively to discard elements that can't be stretched, this will run while stretchable
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elements exist */
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bool has_stretched = false;
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while(stretch_ratio_total>0) { // first of all, dont even be here if no stretchable objects exist
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has_stretched = true;
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bool refit_successful=true; //assume refit-test will go well
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for(int i=0;i<get_child_count();i++) {
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Control *c=get_child(i)->cast_to<Control>();
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if (!c || !c->is_visible_in_tree())
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continue;
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if (c->is_set_as_toplevel())
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continue;
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ERR_FAIL_COND(!min_size_cache.has(c));
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_MinSizeCache &msc=min_size_cache[c];
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if (msc.will_stretch) { //wants to stretch
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//let's see if it can really stretch
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int final_pixel_size=stretch_avail * c->get_stretch_ratio() / stretch_ratio_total;
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if (final_pixel_size<msc.min_size) {
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//if available stretching area is too small for widget,
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//then remove it from stretching area
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msc.will_stretch=false;
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stretch_ratio_total-=c->get_stretch_ratio();
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refit_successful=false;
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stretch_avail-=msc.min_size;
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msc.final_size=msc.min_size;
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break;
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} else {
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msc.final_size=final_pixel_size;
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}
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}
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}
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if (refit_successful) //uf refit went well, break
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break;
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}
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/** Final pass, draw and stretch elements **/
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int ofs=0;
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if (!has_stretched) {
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switch (align) {
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case ALIGN_BEGIN:
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break;
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case ALIGN_CENTER:
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ofs = stretch_diff / 2;
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break;
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case ALIGN_END:
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ofs = stretch_diff;
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break;
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}
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}
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first=true;
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int idx=0;
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for(int i=0;i<get_child_count();i++) {
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Control *c=get_child(i)->cast_to<Control>();
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if (!c || !c->is_visible_in_tree())
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continue;
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if (c->is_set_as_toplevel())
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continue;
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_MinSizeCache &msc=min_size_cache[c];
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if (first)
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first=false;
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else
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ofs+=sep;
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int from=ofs;
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int to=ofs+msc.final_size;
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if (msc.will_stretch && idx==children_count-1) {
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//adjust so the last one always fits perfect
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//compensating for numerical imprecision
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to=vertical?new_size.height:new_size.width;
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}
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int size=to-from;
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Rect2 rect;
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if (vertical) {
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rect=Rect2(0,from,new_size.width,size);
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} else {
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rect=Rect2(from,0,size,new_size.height);
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}
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fit_child_in_rect(c,rect);
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ofs=to;
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idx++;
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}
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}
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Size2 BoxContainer::get_minimum_size() const {
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/* Calculate MINIMUM SIZE */
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Size2i minimum;
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int sep=get_constant("separation");//,vertical?"VBoxContainer":"HBoxContainer");
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bool first=true;
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for(int i=0;i<get_child_count();i++) {
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Control *c=get_child(i)->cast_to<Control>();
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if (!c)
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continue;
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if (c->is_set_as_toplevel())
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continue;
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if (!c->is_visible()) {
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continue;
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}
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Size2i size=c->get_combined_minimum_size();
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if (vertical) { /* VERTICAL */
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if ( size.width > minimum.width ) {
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minimum.width=size.width;
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}
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minimum.height+=size.height+(first?0:sep);
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} else { /* HORIZONTAL */
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if ( size.height > minimum.height ) {
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minimum.height=size.height;
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}
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minimum.width+=size.width+(first?0:sep);
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}
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first=false;
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}
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return minimum;
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}
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void BoxContainer::_notification(int p_what) {
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switch(p_what) {
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case NOTIFICATION_SORT_CHILDREN: {
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_resort();
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} break;
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}
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}
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void BoxContainer::set_alignment(AlignMode p_align) {
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align = p_align;
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_resort();
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}
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BoxContainer::AlignMode BoxContainer::get_alignment() const {
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return align;
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}
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void BoxContainer::add_spacer(bool p_begin) {
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Control *c = memnew( Control );
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c->set_mouse_filter(MOUSE_FILTER_PASS); //allow spacer to pass mouse events
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if (vertical)
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c->set_v_size_flags(SIZE_EXPAND_FILL);
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else
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c->set_h_size_flags(SIZE_EXPAND_FILL);
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add_child(c);
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if (p_begin)
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move_child(c,0);
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}
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BoxContainer::BoxContainer(bool p_vertical) {
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vertical=p_vertical;
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align = ALIGN_BEGIN;
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//set_ignore_mouse(true);
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set_mouse_filter(MOUSE_FILTER_PASS);
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}
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void BoxContainer::_bind_methods() {
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ClassDB::bind_method(_MD("add_spacer","begin"),&BoxContainer::add_spacer);
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ClassDB::bind_method(_MD("get_alignment"),&BoxContainer::get_alignment);
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ClassDB::bind_method(_MD("set_alignment","alignment"),&BoxContainer::set_alignment);
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BIND_CONSTANT( ALIGN_BEGIN );
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BIND_CONSTANT( ALIGN_CENTER );
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BIND_CONSTANT( ALIGN_END );
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ADD_PROPERTY( PropertyInfo(Variant::INT,"alignment", PROPERTY_HINT_ENUM, "Begin,Center,End"), _SCS("set_alignment"),_SCS("get_alignment") );
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}
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MarginContainer* VBoxContainer::add_margin_child(const String& p_label,Control *p_control,bool p_expand) {
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Label *l = memnew( Label );
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l->set_text(p_label);
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add_child(l);
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MarginContainer *mc = memnew( MarginContainer );
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mc->add_child(p_control);
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add_child(mc);
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if (p_expand)
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mc->set_v_size_flags(SIZE_EXPAND_FILL);
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return mc;
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}
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