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Allow FormSpec elements to be focused with set_focus
(#9353)
This allows you to specify a FormSpec element to set the focus of with "set_focus[<name>;<always set>]".
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@ -2492,7 +2492,7 @@ Elements
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* There are two ways to use it:
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1. handle the changed event (only changed scrollbar is available)
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2. read the value on pressing a button (all scrollbars are available)
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* `orientation`: `vertical`/`horizontal`
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* `orientation`: `vertical`/`horizontal`. Default horizontal.
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* Fieldname data is transferred to Lua
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* Value of this trackbar is set to (`0`-`1000`) by default
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* See also `minetest.explode_scrollbar_event`
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@ -2606,6 +2606,28 @@ Elements
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* All provided states must be active for the style to apply.
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* See [Styling Formspecs].
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### `set_focus[<name>;<force>]`
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* Sets the focus to the element with the same `name` parameter.
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* **Note**: This element must be placed before the element it focuses.
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* `force` (optional, default `false`): By default, focus is not applied for
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re-sent formspecs with the same name so that player-set focus is kept.
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`true` sets the focus to the specified element for every sent formspec.
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* The following elements have the ability to be focused:
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* checkbox
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* button
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* button_exit
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* image_button
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* image_button_exit
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* item_image_button
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* table
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* textlist
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* dropdown
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* field
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* pwdfield
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* textarea
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* scrollbar
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Migrating to Real Coordinates
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-----------------------------
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@ -4485,7 +4507,7 @@ Call these functions only at load time!
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* a button was pressed,
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* Enter was pressed while the focus was on a text field
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* a checkbox was toggled,
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* something was selecteed in a drop-down list,
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* something was selected in a dropdown list,
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* a different tab was selected,
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* selection was changed in a textlist or table,
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* an entry was double-clicked in a textlist or table,
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@ -627,7 +627,7 @@ void GUIFormSpecMenu::parseCheckbox(parserData* data, const std::string &element
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auto style = getDefaultStyleForElement("checkbox", name);
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e->setNotClipped(style.getBool(StyleSpec::NOCLIP, false));
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if (spec.fname == data->focused_fieldname) {
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if (spec.fname == m_focused_element) {
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Environment->setFocus(e);
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}
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@ -703,6 +703,10 @@ void GUIFormSpecMenu::parseScrollBar(parserData* data, const std::string &elemen
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e->setPageSize(scrollbar_size * (max - min + 1) / data->scrollbar_options.thumb_size);
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if (spec.fname == m_focused_element) {
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Environment->setFocus(e);
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}
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m_scrollbars.emplace_back(spec,e);
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m_fields.push_back(spec);
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return;
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@ -1029,7 +1033,7 @@ void GUIFormSpecMenu::parseButton(parserData* data, const std::string &element,
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auto style = getStyleForElement(type, name, (type != "button") ? "button" : "");
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e->setStyles(style);
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if (spec.fname == data->focused_fieldname) {
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if (spec.fname == m_focused_element) {
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Environment->setFocus(e);
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}
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@ -1218,7 +1222,7 @@ void GUIFormSpecMenu::parseTable(parserData* data, const std::string &element)
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GUITable *e = new GUITable(Environment, data->current_parent, spec.fid,
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rect, m_tsrc);
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if (spec.fname == data->focused_fieldname) {
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if (spec.fname == m_focused_element) {
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Environment->setFocus(e);
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}
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@ -1295,7 +1299,7 @@ void GUIFormSpecMenu::parseTextList(parserData* data, const std::string &element
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GUITable *e = new GUITable(Environment, data->current_parent, spec.fid,
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rect, m_tsrc);
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if (spec.fname == data->focused_fieldname) {
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if (spec.fname == m_focused_element) {
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Environment->setFocus(e);
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}
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@ -1373,7 +1377,7 @@ void GUIFormSpecMenu::parseDropDown(parserData* data, const std::string &element
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gui::IGUIComboBox *e = Environment->addComboBox(rect, data->current_parent,
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spec.fid);
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if (spec.fname == data->focused_fieldname) {
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if (spec.fname == m_focused_element) {
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Environment->setFocus(e);
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}
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@ -1460,7 +1464,7 @@ void GUIFormSpecMenu::parsePwdField(parserData* data, const std::string &element
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gui::IGUIEditBox *e = Environment->addEditBox(0, rect, true,
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data->current_parent, spec.fid);
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if (spec.fname == data->focused_fieldname) {
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if (spec.fname == m_focused_element) {
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Environment->setFocus(e);
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}
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@ -1537,7 +1541,7 @@ void GUIFormSpecMenu::createTextField(parserData *data, FieldSpec &spec,
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auto style = getDefaultStyleForElement(is_multiline ? "textarea" : "field", spec.fname);
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if (e) {
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if (is_editable && spec.fname == data->focused_fieldname)
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if (is_editable && spec.fname == m_focused_element)
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Environment->setFocus(e);
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if (is_multiline) {
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@ -1986,7 +1990,7 @@ void GUIFormSpecMenu::parseImageButton(parserData* data, const std::string &elem
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GUIButtonImage *e = GUIButtonImage::addButton(Environment, rect, m_tsrc,
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data->current_parent, spec.fid, spec.flabel.c_str());
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if (spec.fname == data->focused_fieldname) {
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if (spec.fname == m_focused_element) {
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Environment->setFocus(e);
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}
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@ -2099,10 +2103,6 @@ void GUIFormSpecMenu::parseTabHeader(parserData* data, const std::string &elemen
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irr::gui::EGUIA_UPPERLEFT, irr::gui::EGUIA_LOWERRIGHT);
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e->setTabHeight(geom.Y);
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if (spec.fname == data->focused_fieldname) {
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Environment->setFocus(e);
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}
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auto style = getDefaultStyleForElement("tabheader", name);
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e->setNotClipped(style.getBool(StyleSpec::NOCLIP, true));
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@ -2194,7 +2194,7 @@ void GUIFormSpecMenu::parseItemImageButton(parserData* data, const std::string &
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auto style = getStyleForElement("item_image_button", spec_btn.fname, "image_button");
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e_btn->setStyles(style);
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if (spec_btn.fname == data->focused_fieldname) {
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if (spec_btn.fname == m_focused_element) {
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Environment->setFocus(e_btn);
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}
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@ -2665,6 +2665,27 @@ bool GUIFormSpecMenu::parseStyle(parserData *data, const std::string &element, b
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return true;
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}
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void GUIFormSpecMenu::parseSetFocus(const std::string &element)
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{
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std::vector<std::string> parts = split(element, ';');
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if (parts.size() <= 2 ||
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(parts.size() > 2 && m_formspec_version > FORMSPEC_API_VERSION))
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{
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if (m_is_form_regenerated)
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return; // Never focus on resizing
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bool force_focus = parts.size() >= 2 && is_yes(parts[1]);
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if (force_focus || m_text_dst->m_formname != m_last_formname)
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setFocus(parts[0]);
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return;
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}
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errorstream << "Invalid set_focus element (" << parts.size() << "): '" << element
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<< "'" << std::endl;
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}
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void GUIFormSpecMenu::parseElement(parserData* data, const std::string &element)
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{
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//some prechecks
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@ -2856,6 +2877,11 @@ void GUIFormSpecMenu::parseElement(parserData* data, const std::string &element)
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return;
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}
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if (type == "set_focus") {
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parseSetFocus(description);
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return;
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}
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// Ignore others
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infostream << "Unknown DrawSpec: type=" << type << ", data=\"" << description << "\""
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<< std::endl;
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@ -2863,36 +2889,38 @@ void GUIFormSpecMenu::parseElement(parserData* data, const std::string &element)
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void GUIFormSpecMenu::regenerateGui(v2u32 screensize)
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{
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/* useless to regenerate without a screensize */
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// Useless to regenerate without a screensize
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if ((screensize.X <= 0) || (screensize.Y <= 0)) {
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return;
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}
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parserData mydata;
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//preserve tables
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for (auto &m_table : m_tables) {
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std::string tablename = m_table.first.fname;
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GUITable *table = m_table.second;
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mydata.table_dyndata[tablename] = table->getDynamicData();
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}
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// Preserve stuff only on same form, not on a new form.
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if (m_text_dst->m_formname == m_last_formname) {
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// Preserve tables/textlists
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for (auto &m_table : m_tables) {
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std::string tablename = m_table.first.fname;
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GUITable *table = m_table.second;
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mydata.table_dyndata[tablename] = table->getDynamicData();
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}
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//set focus
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if (!m_focused_element.empty())
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mydata.focused_fieldname = m_focused_element;
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//preserve focus
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gui::IGUIElement *focused_element = Environment->getFocus();
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if (focused_element && focused_element->getParent() == this) {
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s32 focused_id = focused_element->getID();
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if (focused_id > 257) {
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for (const GUIFormSpecMenu::FieldSpec &field : m_fields) {
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if (field.fid == focused_id) {
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mydata.focused_fieldname = field.fname;
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break;
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// Preserve focus
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gui::IGUIElement *focused_element = Environment->getFocus();
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if (focused_element && focused_element->getParent() == this) {
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s32 focused_id = focused_element->getID();
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if (focused_id > 257) {
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for (const GUIFormSpecMenu::FieldSpec &field : m_fields) {
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if (field.fid == focused_id) {
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m_focused_element = field.fname;
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break;
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}
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}
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}
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}
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} else {
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// Don't keep old focus value
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m_focused_element = "";
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}
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// Remove children
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@ -3253,8 +3281,8 @@ void GUIFormSpecMenu::regenerateGui(v2u32 screensize)
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}
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}
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//set initial focus if parser didn't set it
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focused_element = Environment->getFocus();
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// Set initial focus if parser didn't set it
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gui::IGUIElement *focused_element = Environment->getFocus();
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if (!focused_element
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|| !isMyChild(focused_element)
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|| focused_element->getType() == gui::EGUIET_TAB_CONTROL)
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@ -3265,6 +3293,13 @@ void GUIFormSpecMenu::regenerateGui(v2u32 screensize)
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// legacy sorting
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if (m_formspec_version < 3)
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legacySortElements(legacy_sort_start);
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// Formname and regeneration setting
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if (!m_is_form_regenerated) {
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// Only set previous form name if we purposefully showed a new formspec
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m_last_formname = m_text_dst->m_formname;
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m_is_form_regenerated = true;
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}
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}
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void GUIFormSpecMenu::legacySortElements(core::list<IGUIElement *>::Iterator from)
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@ -3382,6 +3417,7 @@ void GUIFormSpecMenu::drawMenu()
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const std::string &newform = m_form_src->getForm();
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if (newform != m_formspec_string) {
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m_formspec_string = newform;
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m_is_form_regenerated = false;
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regenerateGui(m_screensize_old);
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}
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}
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@ -168,6 +168,7 @@ public:
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{
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m_formspec_string = formspec_string;
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m_current_inventory_location = current_inventory_location;
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m_is_form_regenerated = false;
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regenerateGui(m_screensize_old);
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}
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@ -299,6 +300,10 @@ protected:
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std::string m_formspec_prepend;
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InventoryLocation m_current_inventory_location;
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// Default true because we can't control regeneration on resizing, but
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// we can control cases when the formspec is shown intentionally.
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bool m_is_form_regenerated = true;
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std::vector<GUIInventoryList *> m_inventorylists;
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std::vector<ListRingSpec> m_inventory_rings;
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std::vector<gui::IGUIElement *> m_backgrounds;
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@ -339,10 +344,10 @@ protected:
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video::SColor m_default_tooltip_bgcolor;
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video::SColor m_default_tooltip_color;
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private:
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IFormSource *m_form_src;
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TextDest *m_text_dst;
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std::string m_last_formname;
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u16 m_formspec_version = 1;
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std::string m_focused_element = "";
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JoystickController *m_joystick;
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@ -359,7 +364,6 @@ private:
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core::rect<s32> rect;
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v2s32 basepos;
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v2u32 screensize;
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std::string focused_fieldname;
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GUITable::TableOptions table_options;
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GUITable::TableColumns table_columns;
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gui::IGUIElement *current_parent = nullptr;
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@ -439,6 +443,7 @@ private:
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bool parseAnchorDirect(parserData *data, const std::string &element);
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void parseAnchor(parserData *data, const std::string &element);
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bool parseStyle(parserData *data, const std::string &element, bool style_type);
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void parseSetFocus(const std::string &element);
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void tryClose();
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