Make control line type automatically set

Perspective control line type is automatically set when first drawn. The
type is determined by the line's angle. Buttons for specifying which
line type to draw are removed.

rtdata/images/svg/draw-horizontal.svg

@@ -1,117 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://creativecommons.org/ns#"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   sodipodi:docname="draw-horizontal.svg"
-   inkscape:version="1.0 (4035a4fb49, 2020-05-01)"
-   inkscape:export-ydpi="96"
-   inkscape:export-xdpi="96"
-   inkscape:export-filename="/tmp/template.png"
-   id="SVGRoot"
-   version="1.1"
-   viewBox="0 0 24 24"
-   height="24px"
-   width="24px">
-  <sodipodi:namedview
-     inkscape:document-rotation="0"
-     inkscape:snap-bbox-midpoints="false"
-     inkscape:snap-grids="true"
-     inkscape:object-nodes="false"
-     inkscape:snap-others="false"
-     inkscape:bbox-nodes="true"
-     inkscape:snap-bbox="true"
-     inkscape:pagecheckerboard="false"
-     inkscape:grid-bbox="true"
-     inkscape:window-maximized="1"
-     inkscape:window-y="0"
-     inkscape:window-x="0"
-     inkscape:window-height="1041"
-     inkscape:window-width="1920"
-     showgrid="true"
-     inkscape:current-layer="layer1"
-     inkscape:document-units="px"
-     inkscape:cy="11.139546"
-     inkscape:cx="10.622929"
-     inkscape:zoom="20"
-     inkscape:pageshadow="2"
-     inkscape:pageopacity="0"
-     borderopacity="1.0"
-     bordercolor="#666768"
-     pagecolor="#E0E1E2"
-     id="base">
-    <inkscape:grid
-       dotted="false"
-       empspacing="11"
-       originy="1"
-       originx="1"
-       id="grid1374"
-       type="xygrid" />
-  </sodipodi:namedview>
-  <defs
-     id="defs815" />
-  <metadata
-     id="metadata818">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-        <dc:title></dc:title>
-        <dc:creator>
-          <cc:Agent>
-            <dc:title>Lawrence</dc:title>
-          </cc:Agent>
-        </dc:creator>
-        <dc:rights>
-          <cc:Agent>
-            <dc:title />
-          </cc:Agent>
-        </dc:rights>
-        <dc:description>RawTherapee icon.</dc:description>
-        <cc:license
-           rdf:resource="http://creativecommons.org/licenses/by-sa/4.0/" />
-      </cc:Work>
-      <cc:License
-         rdf:about="http://creativecommons.org/licenses/by-sa/4.0/">
-        <cc:permits
-           rdf:resource="http://creativecommons.org/ns#Reproduction" />
-        <cc:permits
-           rdf:resource="http://creativecommons.org/ns#Distribution" />
-        <cc:requires
-           rdf:resource="http://creativecommons.org/ns#Notice" />
-        <cc:requires
-           rdf:resource="http://creativecommons.org/ns#Attribution" />
-        <cc:permits
-           rdf:resource="http://creativecommons.org/ns#DerivativeWorks" />
-        <cc:requires
-           rdf:resource="http://creativecommons.org/ns#ShareAlike" />
-      </cc:License>
-    </rdf:RDF>
-  </metadata>
-  <g
-     inkscape:label="Layer 1"
-     inkscape:groupmode="layer"
-     id="layer1">
-    <path
-       sodipodi:nodetypes="cccc"
-       id="path831"
-       d="m 9,12 3,3 -4.5,1.5 z"
-       style="opacity:0.7;fill:#2a7fff;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" />
-    <path
-       sodipodi:nodetypes="ccccc"
-       id="path833"
-       d="m 10.5,10.5 3,3 L 21,6 18,3 Z"
-       style="opacity:0.7;fill:#2a7fff;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" />
-    <path
-       sodipodi:nodetypes="cc"
-       id="path835"
-       d="M 19.5,19.5 H 4.5"
-       style="opacity:0.9;fill:none;stroke:#2a7fff;stroke-width:3;stroke-linecap:round;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" />
-  </g>
-</svg>

rtdata/images/svg/draw-vertical.svg

@@ -1,117 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://creativecommons.org/ns#"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   sodipodi:docname="draw-vertical.svg"
-   inkscape:version="1.0 (4035a4fb49, 2020-05-01)"
-   inkscape:export-ydpi="96"
-   inkscape:export-xdpi="96"
-   inkscape:export-filename="/tmp/template.png"
-   id="SVGRoot"
-   version="1.1"
-   viewBox="0 0 24 24"
-   height="24px"
-   width="24px">
-  <sodipodi:namedview
-     inkscape:document-rotation="0"
-     inkscape:snap-bbox-midpoints="false"
-     inkscape:snap-grids="true"
-     inkscape:object-nodes="false"
-     inkscape:snap-others="false"
-     inkscape:bbox-nodes="true"
-     inkscape:snap-bbox="true"
-     inkscape:pagecheckerboard="false"
-     inkscape:grid-bbox="true"
-     inkscape:window-maximized="1"
-     inkscape:window-y="0"
-     inkscape:window-x="0"
-     inkscape:window-height="1041"
-     inkscape:window-width="1920"
-     showgrid="true"
-     inkscape:current-layer="layer1"
-     inkscape:document-units="px"
-     inkscape:cy="11.139546"
-     inkscape:cx="10.622929"
-     inkscape:zoom="20"
-     inkscape:pageshadow="2"
-     inkscape:pageopacity="0"
-     borderopacity="1.0"
-     bordercolor="#666768"
-     pagecolor="#E0E1E2"
-     id="base">
-    <inkscape:grid
-       dotted="false"
-       empspacing="11"
-       originy="1"
-       originx="1"
-       id="grid1374"
-       type="xygrid" />
-  </sodipodi:namedview>
-  <defs
-     id="defs815" />
-  <metadata
-     id="metadata818">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-        <dc:title></dc:title>
-        <dc:creator>
-          <cc:Agent>
-            <dc:title>Lawrence</dc:title>
-          </cc:Agent>
-        </dc:creator>
-        <dc:rights>
-          <cc:Agent>
-            <dc:title />
-          </cc:Agent>
-        </dc:rights>
-        <dc:description>RawTherapee icon.</dc:description>
-        <cc:license
-           rdf:resource="http://creativecommons.org/licenses/by-sa/4.0/" />
-      </cc:Work>
-      <cc:License
-         rdf:about="http://creativecommons.org/licenses/by-sa/4.0/">
-        <cc:permits
-           rdf:resource="http://creativecommons.org/ns#Reproduction" />
-        <cc:permits
-           rdf:resource="http://creativecommons.org/ns#Distribution" />
-        <cc:requires
-           rdf:resource="http://creativecommons.org/ns#Notice" />
-        <cc:requires
-           rdf:resource="http://creativecommons.org/ns#Attribution" />
-        <cc:permits
-           rdf:resource="http://creativecommons.org/ns#DerivativeWorks" />
-        <cc:requires
-           rdf:resource="http://creativecommons.org/ns#ShareAlike" />
-      </cc:License>
-    </rdf:RDF>
-  </metadata>
-  <g
-     inkscape:label="Layer 1"
-     inkscape:groupmode="layer"
-     id="layer1">
-    <path
-       sodipodi:nodetypes="cccc"
-       id="path831"
-       d="m 9,12 3,3 -4.5,1.5 z"
-       style="opacity:0.7;fill:#2a7fff;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" />
-    <path
-       sodipodi:nodetypes="ccccc"
-       id="path833"
-       d="m 10.5,10.5 3,3 L 21,6 18,3 Z"
-       style="opacity:0.7;fill:#2a7fff;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" />
-    <path
-       sodipodi:nodetypes="cc"
-       id="path835"
-       d="m 4.5,4.5 v 15"
-       style="opacity:0.9;fill:none;stroke:#2a7fff;stroke-width:3;stroke-linecap:round;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" />
-  </g>
-</svg>

rtgui/perspective.cc

@@ -52,10 +52,9 @@ PerspCorrection::PerspCorrection () : FoldableToolPanel(this, "perspective", M("
     lens_geom_listener = nullptr;
     metadata = nullptr;
 
-    Gtk::Image* ipers_draw_horiz = Gtk::manage (new RTImage ("draw-horizontal.png"));
+    Gtk::Image* ipers_draw(new RTImage ("draw.png"));
-    Gtk::Image* ipers_draw_vert = Gtk::manage (new RTImage ("draw-vertical.png"));
-    std::unique_ptr<Gtk::Image> ipers_draw(new RTImage ("draw.png"));
     Gtk::Image* ipers_trash = Gtk::manage (new RTImage ("trash-empty.png"));
+    Gtk::Image* ipers_apply = Gtk::manage (new RTImage ("tick.png"));
 
     Gtk::Image* ipersHL =   Gtk::manage (new RTImage ("perspective-horizontal-left-small.png"));
     Gtk::Image* ipersHR =   Gtk::manage (new RTImage ("perspective-horizontal-right-small.png"));
@@ -126,15 +125,11 @@ PerspCorrection::PerspCorrection () : FoldableToolPanel(this, "perspective", M("
     camera_yaw->setAdjusterListener (this);
 
     // Begin control lines interface.
-    lines_button_h = Gtk::manage (new Gtk::ToggleButton());
+    lines_button_apply = Gtk::manage (new Gtk::Button());
-    lines_button_h->set_image(*ipers_draw_horiz);
+    lines_button_apply->set_image(*ipers_apply);
-    lines_button_h->signal_toggled().connect(sigc::bind(sigc::mem_fun(
+    lines_button_apply->set_sensitive(false);
-            *this, &::PerspCorrection::linesButtonPressed), lines_button_h));
+    lines_button_apply->signal_pressed().connect(sigc::mem_fun(
-
+            *this, &::PerspCorrection::linesApplyButtonPressed));
-    lines_button_v = Gtk::manage (new Gtk::ToggleButton());
-    lines_button_v->set_image(*ipers_draw_vert);
-    lines_button_v->signal_toggled().connect(sigc::bind(sigc::mem_fun(
-            *this, &::PerspCorrection::linesButtonPressed), lines_button_v));
 
     lines_button_edit = Gtk::manage (new Gtk::ToggleButton());
     lines_button_edit->set_image(*ipers_draw);
@@ -150,16 +145,12 @@ PerspCorrection::PerspCorrection () : FoldableToolPanel(this, "perspective", M("
     lines = std::unique_ptr<ControlLineManager>(new ControlLineManager());
     lines->callbacks = std::make_shared<LinesCallbacks>(this);
 
-    img_ctrl_lines_apply = std::unique_ptr<Gtk::Image>(new RTImage ("tick.png"));
-    img_ctrl_lines_edit = std::move(ipers_draw);
-
     Gtk::HBox* control_lines_box = Gtk::manage (new Gtk::HBox());
     control_lines_box->set_tooltip_text( M("TP_PERSPECTIVE_CONTROL_LINES_TOOLTIP") );
     Gtk::Label* control_lines_label = Gtk::manage (new Gtk::Label (M("TP_PERSPECTIVE_CONTROL_LINES") + ": "));
     control_lines_box->pack_start(*control_lines_label, Gtk::PACK_SHRINK);
-    control_lines_box->pack_start(*lines_button_v);
-    control_lines_box->pack_start(*lines_button_h);
     control_lines_box->pack_start(*lines_button_edit);
+    control_lines_box->pack_start(*lines_button_apply);
     control_lines_box->pack_start(*lines_button_erase);
     // End control lines interface.
 
@@ -595,8 +586,6 @@ void PerspCorrection::setBatchMode (bool batchMode)
     projection_shift_vert->showEditedCB ();
     projection_yaw->showEditedCB ();
 
-    lines_button_h->set_sensitive(false);
-    lines_button_v->set_sensitive(false);
     lines_button_edit->set_sensitive(false);
     auto_pitch->set_sensitive(false);
     auto_yaw->set_sensitive(false);
@@ -653,8 +642,6 @@ void PerspCorrection::setFocalLengthValue (const ProcParams* pparams, const Fram
 
 void PerspCorrection::switchOffEditMode(void)
 {
-    lines_button_h->set_active(false);
-    lines_button_v->set_active(false);
     lines_button_edit->set_active(false);
 }
 
@@ -663,62 +650,37 @@ void PerspCorrection::setEditProvider(EditDataProvider* provider)
     lines->setEditProvider(provider);
 }
 
-void PerspCorrection::linesButtonPressed(Gtk::ToggleButton* button)
+void PerspCorrection::linesApplyButtonPressed(void)
 {
-    lines->setLinesState(lines_button_h->get_active(), lines_button_v->get_active());
+    if (method->get_active_row_number() == 1) {
-
+        // Calculate perspective distortion if in camera-based mode.
-    if (!button->get_active()) {
+        applyControlLines();
-        return;
     }
-
+    lines_button_edit->set_active(false);
-    if (button == lines_button_h) {
-        lines->draw_line_type = rtengine::ControlLine::HORIZONTAL;
-        if (lines_button_v->get_active()) {
-            lines_button_v->set_active(false);
-        }
-    } else if (button == lines_button_v) {
-        lines->draw_line_type = rtengine::ControlLine::VERTICAL;
-        if (lines_button_h->get_active()) {
-            lines_button_h->set_active(false);
-        }
-    }
-
-    if (!lines_button_edit->get_active()) {
-        lines_button_edit->set_active(true);
-    }
-
-    lines->setDrawMode(true);
 }
 
 void PerspCorrection::linesEditButtonPressed(void)
 {
     if (lines_button_edit->get_active()) { // Enter edit mode.
         lines->setActive(true);
-        if (img_ctrl_lines_apply) {
+        lines->setDrawMode(true);
-            lines_button_edit->set_image(*img_ctrl_lines_apply);
-        }
         render = false;
-        lines->setLinesState(lines_button_h->get_active(), lines_button_v->get_active());
         if (lens_geom_listener) {
             lens_geom_listener->updateTransformPreviewRequested(EvPerspRender, false);
         }
+        lines_button_apply->set_sensitive(true);
         lines_button_erase->set_sensitive(true);
         setCamBasedEventsActive(false);
     } else { // Leave edit mode.
         setCamBasedEventsActive(true);
+        lines_button_apply->set_sensitive(false);
         lines_button_erase->set_sensitive(false);
         render = true;
+        if (lens_geom_listener) {
+            lens_geom_listener->updateTransformPreviewRequested(EvPerspRender, true);
+        }
         lines->setDrawMode(false);
         lines->setActive(false);
-        if (img_ctrl_lines_edit) {
-            lines_button_edit->set_image(*img_ctrl_lines_edit);
-        }
-        lines_button_h->set_active(false);
-        lines_button_v->set_active(false);
-        if (method->get_active_row_number() == 1) {
-            // Calculate perspective distortion if in camera-based mode.
-            applyControlLines();
-        }
     }
 }
 
@@ -763,16 +725,6 @@ ControlLineManager::ControlLineManager():
     line_icon_v_prelight = Cairo::RefPtr<RTSurface>(new RTSurface("bidirectional-arrow-vertical-prelight.png"));
 }
 
-Geometry::State ControlLineManager::calcLineState(const ::ControlLine& line) const
-{
-    if (line.type == rtengine::ControlLine::HORIZONTAL && active_h) {
-        return Geometry::NORMAL;
-    } else if (line.type == rtengine::ControlLine::VERTICAL && active_v) {
-        return Geometry::NORMAL;
-    }
-    return Geometry::INSENSITIVE;
-}
-
 void ControlLineManager::setActive(bool active)
 {
     EditDataProvider* provider = getEditProvider();
@@ -797,19 +749,6 @@ void ControlLineManager::setDrawMode(bool draw)
     draw_mode = draw;
 }
 
-void ControlLineManager::setLinesState(bool horiz_active, bool vert_active)
-{
-    active_h = horiz_active;
-    active_v = vert_active;
-
-    for (auto line = control_lines.begin(); line != control_lines.end(); line++) {
-        auto state = calcLineState(**line);
-        (*line)->begin->state = state;
-        (*line)->end->state = state;
-        (*line)->line->state = state;
-    }
-}
-
 size_t ControlLineManager::size(void) const
 {
     return control_lines.size();
@@ -835,6 +774,7 @@ bool ControlLineManager::button1Pressed(int modifierKey)
         }
     } else if (draw_mode && (modifierKey & GDK_CONTROL_MASK)) { // Add new line.
         addLine(dataProvider->posImage, dataProvider->posImage);
+        drawing_line = true;
         selected_object = mouseOverGeometry.size() - 1; // Select endpoint.
         action = Action::DRAGGING;
     }
@@ -848,6 +788,7 @@ bool ControlLineManager::button1Released(void)
     if (selected_object > 0) {
         mouseOverGeometry[selected_object]->state = Geometry::NORMAL;
     }
+    drawing_line = false;
     selected_object = -1;
     return false;
 }
@@ -894,11 +835,6 @@ bool ControlLineManager::pick1(bool picked)
 
     visibleGeometry[object_id - 1] = line.icon.get();
 
-    auto state = calcLineState(line);
-    line.begin->state = state;
-    line.end->state = state;
-    line.line->state = state;
-
     return true;
 }
 
@@ -975,6 +911,9 @@ bool ControlLineManager::drag1(int modifierKey)
     control_line.icon_v->position.x = control_line.icon_h->position.x;
     control_line.icon_v->position.y = control_line.icon_h->position.y;
 
+    if (drawing_line) {
+        autoSetLineType(selected_object);
+    }
 
     return false;
 }
@@ -1011,10 +950,8 @@ bool ControlLineManager::mouseOver(int modifierKey)
     }
 
     if (prev_obj != cur_obj && prev_obj > 0) {
-        auto state = calcLineState(*control_lines[(prev_obj - 1) / ::ControlLine::OBJ_COUNT]);
+        visibleGeometry[prev_obj - 1]->state = Geometry::NORMAL;
-        visibleGeometry[prev_obj - 1]->state = state;
     }
-
     prev_obj = cur_obj;
 
     return true;
@@ -1073,13 +1010,9 @@ void ControlLineManager::addLine(Coord begin, Coord end)
     control_line->end = std::move(end_c);
     control_line->icon_h = icon_h;
     control_line->icon_v = icon_v;
-    if (draw_line_type == rtengine::ControlLine::HORIZONTAL) {
-        control_line->icon = icon_h;
-    } else if (draw_line_type == rtengine::ControlLine::VERTICAL) {
     control_line->icon = icon_v;
-    }
     control_line->line = std::move(line);
-    control_line->type = draw_line_type;
+    control_line->type = rtengine::ControlLine::VERTICAL;
 
     EditSubscriber::visibleGeometry.push_back(control_line->line.get());
     EditSubscriber::visibleGeometry.push_back(control_line->icon.get());
@@ -1094,6 +1027,39 @@ void ControlLineManager::addLine(Coord begin, Coord end)
     control_lines.push_back(std::move(control_line));
 }
 
+void ControlLineManager::autoSetLineType(int object_id)
+{
+    int line_id = (object_id - 1) / ::ControlLine::OBJ_COUNT;
+    ::ControlLine& line = *control_lines[line_id];
+
+    int dx = line.begin->center.x - line.end->center.x;
+    int dy = line.begin->center.y - line.end->center.y;
+
+    if (dx < 0) {
+        dx = -dx;
+    }
+    if (dy < 0) {
+        dy = -dy;
+    }
+
+    rtengine::ControlLine::Type type;
+    std::shared_ptr<OPIcon> icon;
+
+    if (dx > dy) { // More horizontal than vertical.
+        type = rtengine::ControlLine::HORIZONTAL;
+        icon = line.icon_h;
+    } else {
+        type = rtengine::ControlLine::VERTICAL;
+        icon = line.icon_v;
+    }
+
+    if (type != line.type) { // Need to update line type.
+        line.type = type;
+        line.icon = icon;
+        visibleGeometry[line_id * ::ControlLine::OBJ_COUNT + 1] = line.icon.get();
+    }
+}
+
 void ControlLineManager::removeAll(void)
 {
     visibleGeometry.clear();

rtgui/perspective.h

@@ -41,21 +41,27 @@ class ControlLineManager: EditSubscriber
 {
 
 protected:
-    /** Determine how horizontal and vertical lines are displayed. */
-    bool active_h, active_v;
     /** Hidden object for capturing mouse events. */
     std::unique_ptr<Rectangle> canvas_area;
     rtengine::Coord drag_delta;
     std::vector<std::unique_ptr<ControlLine>> control_lines;
     CursorShape cursor;
     bool draw_mode;
+    bool drawing_line = false;
     Cairo::RefPtr<RTSurface> line_icon_h, line_icon_v;
     Cairo::RefPtr<RTSurface> line_icon_h_prelight, line_icon_v_prelight;
     int prev_obj;
     int selected_object;
 
     void addLine (rtengine::Coord begin, rtengine::Coord end);
-    Geometry::State calcLineState(const ControlLine& line) const;
+    /**
+     * Set the line type of the line containing the object according to the
+     * line's angle.
+     *
+     * If the line is within 45 degrees of a perfectly vertical
+     * line, inclusive, the line type is set to vertical. Otherwise, horizontal.
+     */
+    void autoSetLineType(int object_id);
     void removeLine (size_t line_id);
 
 public:
@@ -69,8 +75,6 @@ public:
 
     /** Callbacks to invoke. */
     std::shared_ptr<Callbacks> callbacks;
-    /** Type of line for newly drawn lines. */
-    rtengine::ControlLine::Type draw_line_type;
 
     ControlLineManager();
 
@@ -80,8 +84,6 @@ public:
     /** Set whether or not lines can be drawn and deleted. */
     void setDrawMode (bool draw);
     void setEditProvider (EditDataProvider* provider);
-    /** Determines how each line type is displayed. */
-    void setLinesState (bool horiz_active, bool vert_active);
     /** Returns the number of lines. */
     size_t size (void) const;
     /**
@@ -124,13 +126,10 @@ protected:
     Adjuster* camera_shift_horiz;
     Adjuster* camera_shift_vert;
     Adjuster* camera_yaw;
-    std::unique_ptr<Gtk::Image> img_ctrl_lines_edit;
-    std::unique_ptr<Gtk::Image> img_ctrl_lines_apply;
     std::unique_ptr<ControlLineManager> lines;
+    Gtk::Button* lines_button_apply;
     Gtk::ToggleButton* lines_button_edit;
     Gtk::Button* lines_button_erase;
-    Gtk::ToggleButton* lines_button_h;
-    Gtk::ToggleButton* lines_button_v;
     Adjuster* projection_pitch;
     Adjuster* projection_rotate;
     Adjuster* projection_shift_horiz;
@@ -174,7 +173,7 @@ public:
 
     void adjusterChanged (Adjuster* a, double newval) override;
     void autoCorrectionPressed (Gtk::Button* b);
-    void linesButtonPressed (Gtk::ToggleButton* button);
+    void linesApplyButtonPressed (void);
     void linesEditButtonPressed (void);
     void linesEraseButtonPressed (void);
     void methodChanged (void);