/*************************************************************************
Handler for when character (printable keys) are typed
*************************************************************************/
void MultiLineEditbox::onCharacter(KeyEventArgs& e)
{
// base class processing
Window::onCharacter(e);
// only need to take notice if we have focus
if (hasInputFocus() && !isReadOnly() && getFont()->isCodepointAvailable(e.codepoint))
{
// erase selected text
eraseSelectedText();
// if there is room
if (d_text.length() - 1 < d_maxTextLen)
{
d_text.insert(getCaratIndex(), 1, e.codepoint);
d_caratPos++;
WindowEventArgs args(this);
onTextChanged(args);
}
else
{
// Trigger text box full event
WindowEventArgs args(this);
onEditboxFullEvent(args);
}
}
e.handled = true;
}
/*************************************************************************
Processing to move carat one word left
*************************************************************************/
void MultiLineEditbox::handleWordLeft(uint sysKeys)
{
if (d_caratPos > 0)
{
setCaratIndex(TextUtils::getWordStartIdx(d_text, getCaratIndex()));
}
if (sysKeys & Shift)
{
setSelection(d_caratPos, d_dragAnchorIdx);
}
else
{
clearSelection();
}
}
/*************************************************************************
Processing to move carat one word right
*************************************************************************/
void MultiLineEditbox::handleWordRight(UINT sysKeys)
{
if (d_caratPos < d_text.length() - 1)
{
setCaratIndex(TextUtils::getNextWordStartIdx(d_text, getCaratIndex()));
}
if (sysKeys & Shift)
{
setSelection(d_caratPos, d_dragAnchorIdx);
}
else
{
clearSelection();
}
}
/*************************************************************************
Processing for Delete key
*************************************************************************/
void MultiLineEditbox::handleDelete(void)
{
if (!isReadOnly())
{
if (getSelectionLength() != 0)
{
eraseSelectedText();
}
else if (getCaratIndex() < d_text.length() - 1)
{
d_text.erase(d_caratPos, 1);
ensureCaratIsVisible();
WindowEventArgs args(this);
onTextChanged(args);
}
}
}
/*************************************************************************
Processing to insert a new line / paragraph.
*************************************************************************/
void MultiLineEditbox::handleNewLine(uint sysKeys)
{
if (!isReadOnly())
{
// erase selected text
eraseSelectedText();
// if there is room
if (d_text.length() - 1 < d_maxTextLen)
{
d_text.insert(getCaratIndex(), 1, 0x0a);
d_caratPos++;
WindowEventArgs args(this);
onTextChanged(args);
}
}
}
/*************************************************************************
Handler for when text is programmatically changed.
*************************************************************************/
void MultiLineEditbox::onTextChanged(WindowEventArgs& e)
{
// ensure last character is a new line
if ((d_text.length() == 0) || (d_text[d_text.length() - 1] != '\n'))
d_text.append(1, '\n');
// base class processing
Window::onTextChanged(e);
// clear selection
clearSelection();
// layout new text
formatText();
// layout child windows (scrollbars) since text layout may have changed
performChildWindowLayout();
// ensure carat is still within the text
setCaratIndex(getCaratIndex());
// ensure carat is visible
// NB: this will already have been called at least once, but since we
// may have changed the formatting of the text, it needs to be called again.
ensureCaratIsVisible();
e.handled = true;
}
void FalagardEditbox::populateRenderCache()
{
const StateImagery* imagery;
// draw container etc
// get WidgetLookFeel for the assigned look.
const WidgetLookFeel& wlf = WidgetLookManager::getSingleton().getWidgetLook(d_lookName);
// try and get imagery for the approprite state.
imagery = &wlf.getStateImagery(isDisabled() ? "Disabled" : (isReadOnly() ? "ReadOnly" : "Enabled"));
// peform the rendering operation for the container.
imagery->render(*this);
// get destination area for text
const Rect textArea(wlf.getNamedArea("TextArea").getArea().getPixelRect(*this));
//
// Required preliminary work for text rendering operations
//
const Font* font = getFont();
// no font == no more rendering
if (!font)
return;
// This will point to the final string to be used for rendering. Useful because it means we
// do not have to have duplicate code or be copying d_text for handling masked/unmasked text.
String* editText;
// Create a 'masked' version of the string if needed.
String maskedText;
if (isTextMasked())
{
maskedText.insert(0, d_text.length(), getMaskCodePoint());
editText = &maskedText;
}
// text not masked to editText will be the windows d_text String.
else
{
editText = &d_text;
}
// calculate best position to render text to ensure carat is always visible
float textOffset;
float extentToCarat = font->getTextExtent(editText->substr(0, getCaratIndex()));
// get carat imagery
const ImagerySection& caratImagery = wlf.getImagerySection("Carat");
// store carat width
float caratWidth = caratImagery.getBoundingRect(*this, textArea).getWidth();
// if box is inactive
if (!hasInputFocus())
{
textOffset = d_lastTextOffset;
}
// if carat is to the left of the box
else if ((d_lastTextOffset + extentToCarat) < 0)
{
textOffset = -extentToCarat;
}
// if carat is off to the right.
else if ((d_lastTextOffset + extentToCarat) >= (textArea.getWidth() - caratWidth))
{
textOffset = textArea.getWidth() - extentToCarat - caratWidth;
}
// else carat is already within the box
else
{
textOffset = d_lastTextOffset;
}
ColourRect colours;
float alpha_comp = getEffectiveAlpha();
//
// Draw label text
//
// setup initial rect for text formatting
Rect text_part_rect(textArea);
// allow for scroll position
text_part_rect.d_left += textOffset;
// centre text vertically within the defined text area
text_part_rect.d_top += (textArea.getHeight() - font->getLineSpacing()) * 0.5f;
// draw pre-highlight text
String sect = editText->substr(0, getSelectionStartIndex());
colours.setColours(d_normalTextColour);
colours.modulateAlpha(alpha_comp);
d_renderCache.cacheText(sect, font, LeftAligned, text_part_rect, 0, colours, &textArea);
// adjust rect for next section
text_part_rect.d_left += font->getTextExtent(sect);
// draw highlight text
sect = editText->substr(getSelectionStartIndex(), getSelectionLength());
colours.setColours(d_selectTextColour);
colours.modulateAlpha(alpha_comp);
d_renderCache.cacheText(sect, font, LeftAligned, text_part_rect, 0, colours, &textArea);
// adjust rect for next section
text_part_rect.d_left += font->getTextExtent(sect);
// draw post-highlight text
sect = editText->substr(getSelectionEndIndex());
colours.setColours(d_normalTextColour);
colours.modulateAlpha(alpha_comp);
d_renderCache.cacheText(sect, font, LeftAligned, text_part_rect, 0, colours, &textArea);
// remember this for next time.
d_lastTextOffset = textOffset;
// see if the editbox is active or inactive.
bool active = (!isReadOnly()) && hasInputFocus();
//
// Render selection imagery.
//
if (getSelectionLength() != 0)
{
// calculate required start and end offsets of selection imagery.
float selStartOffset = font->getTextExtent(editText->substr(0, getSelectionStartIndex()));
float selEndOffset = font->getTextExtent(editText->substr(0, getSelectionEndIndex()));
// calculate area for selection imagery.
Rect hlarea(textArea);
hlarea.d_left += textOffset + selStartOffset;
hlarea.d_right = hlarea.d_left + (selEndOffset - selStartOffset);
// render the selection imagery.
wlf.getStateImagery(active ? "ActiveSelection" : "InactiveSelection").render(*this, hlarea, 0, &textArea);
}
//
// Render carat
//
if (active)
{
Rect caratRect(textArea);
caratRect.d_left += extentToCarat + textOffset;
caratImagery.render(*this, caratRect, 0, 0, &textArea);
}
}
/*************************************************************************
Handler for when non-printable keys are typed.
*************************************************************************/
void MultiLineEditbox::onKeyDown(KeyEventArgs& e)
{
// base class processing
Window::onKeyDown(e);
if (hasInputFocus() && !isReadOnly())
{
WindowEventArgs args(this);
switch (e.scancode)
{
case Key::LeftShift:
case Key::RightShift:
if (getSelectionLength() == 0)
{
d_dragAnchorIdx = getCaratIndex();
}
break;
case Key::Backspace:
handleBackspace();
break;
case Key::Delete:
handleDelete();
break;
case Key::Return:
case Key::NumpadEnter:
handleNewLine(e.sysKeys);
break;
case Key::ArrowLeft:
if (e.sysKeys & Control)
{
handleWordLeft(e.sysKeys);
}
else
{
handleCharLeft(e.sysKeys);
}
break;
case Key::ArrowRight:
if (e.sysKeys & Control)
{
handleWordRight(e.sysKeys);
}
else
{
handleCharRight(e.sysKeys);
}
break;
case Key::ArrowUp:
handleLineUp(e.sysKeys);
break;
case Key::ArrowDown:
handleLineDown(e.sysKeys);
break;
case Key::Home:
if (e.sysKeys & Control)
{
handleDocHome(e.sysKeys);
}
else
{
handleLineHome(e.sysKeys);
}
break;
case Key::End:
if (e.sysKeys & Control)
{
handleDocEnd(e.sysKeys);
}
else
{
handleLineEnd(e.sysKeys);
}
break;
// default case is now to leave event as (possibly) unhandled.
default:
return;
}
e.handled = true;
}
}
