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Add adjustable background frame to the element editor

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Adds a toggleable, visual-only background frame to help proportion an
element's drawing against a representative folio surface, instead of
guessing against a bare grid. Follows the exact precedent of the
existing hotspot indicator (ElementScene::drawForeground()): drawn by
ElementView::drawBackground(), centered on the same origin, and never
written to the saved .elmt file.

- "Afficher le cadre de fond" toggles the frame on/off.
- "Taille du cadre de fond..." opens a small width/height dialog to
  resize it, defaulting to a representative folio's drawable area
  derived from BorderProperties::defaultProperties() (columns_count *
  columns_width by rows_count * rows_height).
- Both the visibility and the last-used size persist via QSettings,
  the same way the existing grid-dot rendering prefs
  (elementeditor/grid_pointsize_min/max) already do.

Implements the scope proposed in discussion #604.
This commit is contained in:
ispyisail
2026-08-03 11:15:50 +12:00
parent 834495387b
commit a245411f9f
4 changed files with 109 additions and 0 deletions
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sources/editor/elementscene.cpp
+44
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@@ -17,6 +17,7 @@
*/
#include "elementscene.h"
#include "../borderproperties.h"
#include "../NameList/ui/namelistdialog.h"
#include "../NameList/ui/namelistwidget.h"
#include "../QPropertyUndoCommand/qpropertyundocommand.h"
@@ -73,6 +74,49 @@ ElementScene::ElementScene(QETElementEditor *editor, QObject *parent) :
this, SLOT(managePrimitivesGroups()));
connect(this, SIGNAL(selectionChanged()),
this, SLOT(managePrimitivesGroups()));
QSettings settings;
m_background_frame_visible = settings.value(
QStringLiteral("elementeditor/background_frame_visible"), false).toBool();
BorderProperties bp = BorderProperties::defaultProperties();
m_background_frame_size = QSizeF(
settings.value(QStringLiteral("elementeditor/background_frame_width"),
bp.columns_count * bp.columns_width).toReal(),
settings.value(QStringLiteral("elementeditor/background_frame_height"),
bp.rows_count * bp.rows_height).toReal());
}
/**
@brief ElementScene::setBackgroundFrameVisible
Toggle the visual-only background frame used to proportion this
element's drawing against a representative folio surface. Like the
hotspot indicator, this frame is never written to the saved .elmt file.
@param visible
*/
void ElementScene::setBackgroundFrameVisible(bool visible)
{
if (m_background_frame_visible == visible) {
return;
}
m_background_frame_visible = visible;
QSettings().setValue(QStringLiteral("elementeditor/background_frame_visible"), visible);
update();
}
/**
@brief ElementScene::setBackgroundFrameSize
@param size the new size (in scene/grid units) of the background frame
*/
void ElementScene::setBackgroundFrameSize(const QSizeF &size)
{
if (m_background_frame_size == size) {
return;
}
m_background_frame_size = size;
QSettings settings;
settings.setValue(QStringLiteral("elementeditor/background_frame_width"), size.width());
settings.setValue(QStringLiteral("elementeditor/background_frame_height"), size.height());
update();
}
/**