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ComboBox API additions for minetest#13814

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- Allow reliably detecting when the user opens a combobox.
- Allow preventing comboboxes from opening.
- Allow sending a combobox change event.
This commit is contained in:
Gregor Parzefall 2023-09-30 16:46:30 +02:00 committed by GitHub
parent d767d27ca8
commit ea1b58387e
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 38 additions and 6 deletions
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4
include/IEventReceiver.h
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@ -263,6 +263,10 @@ namespace irr
//! A checkbox has changed its check state.
EGET_CHECKBOX_CHANGED,
//! A listbox would like to open.
/** You can prevent the listbox from opening by absorbing the event. */
EGET_LISTBOX_OPENED,
//! A new item in a listbox was selected.
/** NOTE: You also get this event currently when the same item was clicked again after more than 500 ms. */
EGET_LISTBOX_CHANGED,

4
include/IGUIComboBox.h
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@ -52,6 +52,10 @@ namespace gui
//! Sets the selected item. Set this to -1 if no item should be selected
virtual void setSelected(s32 idx) = 0;
//! Sets the selected item and emits a change event.
/** Set this to -1 if no item should be selected */
virtual void setAndSendSelected(s32 idx) = 0;
//! Sets text justification of the text area
/** \param horizontal: EGUIA_UPPERLEFT for left justified (default),
EGUIA_LOWERRIGHT for right justified, or EGUIA_CENTER for centered text.

32
source/Irrlicht/CGUIComboBox.cpp
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@ -22,9 +22,9 @@ namespace gui
CGUIComboBox::CGUIComboBox(IGUIEnvironment* environment, IGUIElement* parent,
s32 id, core::rect<s32> rectangle)
: IGUIComboBox(environment, parent, id, rectangle),
ListButton(0), SelectedText(0), ListBox(0), LastFocus(0),
ListButton(nullptr), SelectedText(nullptr), ListBox(nullptr), LastFocus(nullptr),
Selected(-1), HAlign(EGUIA_UPPERLEFT), VAlign(EGUIA_CENTER), MaxSelectionRows(5), HasFocus(false),
ActiveFont(0)
ActiveFont(nullptr)
{
#ifdef _DEBUG
setDebugName("CGUIComboBox");
@ -185,6 +185,15 @@ void CGUIComboBox::setSelected(s32 idx)
}
//! Sets the selected item and emits a change event.
/** Set this to -1 if no item should be selected */
void CGUIComboBox::setAndSendSelected(s32 idx)
{
setSelected(idx);
sendSelectionChangedEvent();
}
//! called if an event happened.
bool CGUIComboBox::OnEvent(const SEvent& event)
{
@ -208,7 +217,7 @@ bool CGUIComboBox::OnEvent(const SEvent& event)
openCloseMenu();
}
ListButton->setPressed(ListBox == 0);
ListButton->setPressed(ListBox == nullptr);
return true;
}
@ -361,7 +370,7 @@ void CGUIComboBox::sendSelectionChangedEvent()
event.EventType = EET_GUI_EVENT;
event.GUIEvent.Caller = this;
event.GUIEvent.Element = 0;
event.GUIEvent.Element = nullptr;
event.GUIEvent.EventType = EGET_COMBO_BOX_CHANGED;
Parent->OnEvent(event);
}
@ -447,12 +456,23 @@ void CGUIComboBox::openCloseMenu()
// close list box
Environment->setFocus(this);
ListBox->remove();
ListBox = 0;
ListBox = nullptr;
}
else
{
if (Parent)
if (Parent) {
SEvent event;
event.EventType = EET_GUI_EVENT;
event.GUIEvent.Caller = this;
event.GUIEvent.Element = nullptr;
event.GUIEvent.EventType = EGET_LISTBOX_OPENED;
// Allow to prevent the listbox from opening.
if (Parent->OnEvent(event))
return;
Parent->bringToFront(this);
}
IGUISkin* skin = Environment->getSkin();
u32 h = Items.size();

4
source/Irrlicht/CGUIComboBox.h
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@ -55,6 +55,10 @@ namespace gui
//! sets the selected item. Set this to -1 if no item should be selected
void setSelected(s32 idx) override;
//! Sets the selected item and emits a change event.
/** Set this to -1 if no item should be selected */
void setAndSendSelected(s32 idx) override;
//! sets the text alignment of the text part
void setTextAlignment(EGUI_ALIGNMENT horizontal, EGUI_ALIGNMENT vertical) override;