Adding upstream version 1.2.2.upstream/1.2.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 465 insertions, 0 deletions

diff --git a/src/ui/tools/rect-tool.cpp b/src/ui/tools/rect-tool.cpp
new file mode 100644
index 0000000..cbbbbab
--- /dev/null
+++ b/src/ui/tools/rect-tool.cpp
@@ -0,0 +1,465 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Rectangle drawing context
+ *
+ * Author:
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   bulia byak <buliabyak@users.sf.net>
+ *   Jon A. Cruz <jon@joncruz.org>
+ *   Abhishek Sharma
+ *
+ * Copyright (C) 2006      Johan Engelen <johan@shouraizou.nl>
+ * Copyright (C) 2000-2005 authors
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <cstring>
+#include <string>
+
+#include <gdk/gdkkeysyms.h>
+#include <glibmm/i18n.h>
+
+#include "context-fns.h"
+#include "desktop-style.h"
+#include "desktop.h"
+#include "document-undo.h"
+#include "document.h"
+#include "include/macros.h"
+#include "message-context.h"
+#include "selection-chemistry.h"
+#include "selection.h"
+
+#include "object/sp-rect.h"
+#include "object/sp-namedview.h"
+
+#include "ui/icon-names.h"
+#include "ui/shape-editor.h"
+#include "ui/tools/rect-tool.h"
+
+#include "xml/node-event-vector.h"
+
+using Inkscape::DocumentUndo;
+
+namespace Inkscape {
+namespace UI {
+namespace Tools {
+
+RectTool::RectTool(SPDesktop *desktop)
+    : ToolBase(desktop, "/tools/shapes/rect", "rect.svg")
+    , rect(nullptr)
+    , rx(0)
+    , ry(0)
+{
+    this->shape_editor = new ShapeEditor(desktop);
+
+    SPItem *item = desktop->getSelection()->singleItem();
+    if (item) {
+        this->shape_editor->set_item(item);
+    }
+
+    this->sel_changed_connection.disconnect();
+    this->sel_changed_connection = desktop->getSelection()->connectChanged(
+    	sigc::mem_fun(this, &RectTool::selection_changed)
+    );
+
+    sp_event_context_read(this, "rx");
+    sp_event_context_read(this, "ry");
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+    if (prefs->getBool("/tools/shapes/selcue")) {
+        this->enableSelectionCue();
+    }
+
+    if (prefs->getBool("/tools/shapes/gradientdrag")) {
+        this->enableGrDrag();
+    }
+}
+
+RectTool::~RectTool() {
+    ungrabCanvasEvents();
+
+    this->finishItem();
+    this->enableGrDrag(false);
+
+    this->sel_changed_connection.disconnect();
+
+    delete this->shape_editor;
+    this->shape_editor = nullptr;
+
+    /* fixme: This is necessary because we do not grab */
+    if (this->rect) {
+        this->finishItem();
+    }
+}
+
+/**
+ * Callback that processes the "changed" signal on the selection;
+ * destroys old and creates new knotholder.
+ */
+void RectTool::selection_changed(Inkscape::Selection* selection) {
+    this->shape_editor->unset_item();
+    this->shape_editor->set_item(selection->singleItem());
+}
+
+void RectTool::set(const Inkscape::Preferences::Entry& val) {
+    /* fixme: Proper error handling for non-numeric data.  Use a locale-independent function like
+     * g_ascii_strtod (or a thin wrapper that does the right thing for invalid values inf/nan). */
+    Glib::ustring name = val.getEntryName();
+    
+    if ( name == "rx" ) {
+        this->rx = val.getDoubleLimited(); // prevents NaN and +/-Inf from messing up
+    } else if ( name == "ry" ) {
+        this->ry = val.getDoubleLimited();
+    }
+}
+
+bool RectTool::item_handler(SPItem* item, GdkEvent* event) {
+    gint ret = FALSE;
+
+    switch (event->type) {
+    case GDK_BUTTON_PRESS:
+        if ( event->button.button == 1) {
+            this->setup_for_drag_start(event);
+        }
+        break;
+        // motion and release are always on root (why?)
+    default:
+        break;
+    }
+
+   	ret = ToolBase::item_handler(item, event);
+
+    return ret;
+}
+
+bool RectTool::root_handler(GdkEvent* event) {
+    static bool dragging;
+
+    Inkscape::Selection *selection = _desktop->getSelection();
+
+    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
+
+    this->tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
+
+    gint ret = FALSE;
+    
+    switch (event->type) {
+    case GDK_BUTTON_PRESS:
+        if (event->button.button == 1) {
+            Geom::Point const button_w(event->button.x, event->button.y);
+
+            // save drag origin
+            this->xp = (gint) button_w[Geom::X];
+            this->yp = (gint) button_w[Geom::Y];
+            this->within_tolerance = true;
+
+            // remember clicked item, disregarding groups, honoring Alt
+            this->item_to_select = sp_event_context_find_item (_desktop, button_w, event->button.state & GDK_MOD1_MASK, TRUE);
+
+            dragging = true;
+
+            /* Position center */
+            Geom::Point button_dt(_desktop->w2d(button_w));
+            this->center = button_dt;
+
+            /* Snap center */
+            SnapManager &m = _desktop->namedview->snap_manager;
+            m.setup(_desktop);
+            m.freeSnapReturnByRef(button_dt, Inkscape::SNAPSOURCE_NODE_HANDLE);
+            m.unSetup();
+            this->center = button_dt;
+
+            grabCanvasEvents();
+            ret = TRUE;
+        }
+        break;
+    case GDK_MOTION_NOTIFY:
+        if ( dragging
+             && (event->motion.state & GDK_BUTTON1_MASK))
+        {
+            if ( this->within_tolerance
+                 && ( abs( (gint) event->motion.x - this->xp ) < this->tolerance )
+                 && ( abs( (gint) event->motion.y - this->yp ) < this->tolerance ) ) {
+                break; // do not drag if we're within tolerance from origin
+            }
+            // Once the user has moved farther than tolerance from the original location
+            // (indicating they intend to draw, not click), then always process the
+            // motion notify coordinates as given (no snapping back to origin)
+            this->within_tolerance = false;
+
+            Geom::Point const motion_w(event->motion.x, event->motion.y);
+            Geom::Point motion_dt(_desktop->w2d(motion_w));
+
+            this->drag(motion_dt, event->motion.state); // this will also handle the snapping
+            gobble_motion_events(GDK_BUTTON1_MASK);
+            ret = TRUE;
+        } else if (!this->sp_event_context_knot_mouseover()) {
+            SnapManager &m = _desktop->namedview->snap_manager;
+            m.setup(_desktop);
+
+            Geom::Point const motion_w(event->motion.x, event->motion.y);
+            Geom::Point motion_dt(_desktop->w2d(motion_w));
+
+            m.preSnap(Inkscape::SnapCandidatePoint(motion_dt, Inkscape::SNAPSOURCE_NODE_HANDLE));
+            m.unSetup();
+        }
+        break;
+    case GDK_BUTTON_RELEASE:
+        this->xp = this->yp = 0;
+        if (event->button.button == 1) {
+            dragging = false;
+            this->discard_delayed_snap_event();
+
+            if (!this->within_tolerance) {
+                // we've been dragging, finish the rect
+                this->finishItem();
+            } else if (this->item_to_select) {
+                // no dragging, select clicked item if any
+                if (event->button.state & GDK_SHIFT_MASK) {
+                    selection->toggle(this->item_to_select);
+                } else {
+                    selection->set(this->item_to_select);
+                }
+            } else {
+                // click in an empty space
+                selection->clear();
+            }
+
+            this->item_to_select = nullptr;
+            ret = TRUE;
+            ungrabCanvasEvents();
+        }
+        break;
+    case GDK_KEY_PRESS:
+        switch (get_latin_keyval (&event->key)) {
+        case GDK_KEY_Alt_L:
+        case GDK_KEY_Alt_R:
+        case GDK_KEY_Control_L:
+        case GDK_KEY_Control_R:
+        case GDK_KEY_Shift_L:
+        case GDK_KEY_Shift_R:
+        case GDK_KEY_Meta_L:  // Meta is when you press Shift+Alt (at least on my machine)
+        case GDK_KEY_Meta_R:
+            if (!dragging){
+                sp_event_show_modifier_tip (this->defaultMessageContext(), event,
+                                            _("<b>Ctrl</b>: make square or integer-ratio rect, lock a rounded corner circular"),
+                                            _("<b>Shift</b>: draw around the starting point"),
+                                            nullptr);
+            }
+            break;
+        case GDK_KEY_x:
+        case GDK_KEY_X:
+            if (MOD__ALT_ONLY(event)) {
+                _desktop->setToolboxFocusTo("rect-width");
+                ret = TRUE;
+            }
+            break;
+
+        case GDK_KEY_g:
+        case GDK_KEY_G:
+            if (MOD__SHIFT_ONLY(event)) {
+                _desktop->selection->toGuides();
+                ret = true;
+            }
+            break;
+
+        case GDK_KEY_Escape:
+            if (dragging) {
+                dragging = false;
+                this->discard_delayed_snap_event();
+                // if drawing, cancel, otherwise pass it up for deselecting
+                this->cancel();
+                ret = TRUE;
+            }
+            break;
+
+        case GDK_KEY_space:
+            if (dragging) {
+                ungrabCanvasEvents();
+                dragging = false;
+                this->discard_delayed_snap_event();
+
+                if (!this->within_tolerance) {
+                    // we've been dragging, finish the rect
+                    this->finishItem();
+                }
+                // do not return true, so that space would work switching to selector
+            }
+            break;
+
+        case GDK_KEY_Delete:
+        case GDK_KEY_KP_Delete:
+        case GDK_KEY_BackSpace:
+            ret = this->deleteSelectedDrag(MOD__CTRL_ONLY(event));
+            break;
+
+        default:
+            break;
+        }
+        break;
+    case GDK_KEY_RELEASE:
+        switch (get_latin_keyval (&event->key)) {
+        case GDK_KEY_Alt_L:
+        case GDK_KEY_Alt_R:
+        case GDK_KEY_Control_L:
+        case GDK_KEY_Control_R:
+        case GDK_KEY_Shift_L:
+        case GDK_KEY_Shift_R:
+        case GDK_KEY_Meta_L:  // Meta is when you press Shift+Alt
+        case GDK_KEY_Meta_R:
+            this->defaultMessageContext()->clear();
+            break;
+        default:
+            break;
+        }
+        break;
+    default:
+        break;
+    }
+
+    if (!ret) {
+    	ret = ToolBase::root_handler(event);
+    }
+
+    return ret;
+}
+
+void RectTool::drag(Geom::Point const pt, guint state) {
+    if (!this->rect) {
+        if (Inkscape::have_viable_layer(_desktop, defaultMessageContext()) == false) {
+            return;
+        }
+
+        // Create object
+        Inkscape::XML::Document *xml_doc = _desktop->doc()->getReprDoc();
+        Inkscape::XML::Node *repr = xml_doc->createElement("svg:rect");
+
+        // Set style
+        sp_desktop_apply_style_tool(_desktop, repr, "/tools/shapes/rect", false);
+
+        this->rect = SP_RECT(currentLayer()->appendChildRepr(repr));
+        Inkscape::GC::release(repr);
+
+        this->rect->transform = currentLayer()->i2doc_affine().inverse();
+        this->rect->updateRepr();
+    }
+
+    Geom::Rect const r = Inkscape::snap_rectangular_box(_desktop, this->rect, pt, this->center, state);
+
+    this->rect->setPosition(r.min()[Geom::X], r.min()[Geom::Y], r.dimensions()[Geom::X], r.dimensions()[Geom::Y]);
+
+    if (this->rx != 0.0) {
+    	this->rect->setRx(true, this->rx);
+    }
+
+    if (this->ry != 0.0) {
+        if (this->rx == 0.0)
+        	this->rect->setRy(true, CLAMP(this->ry, 0, MIN(r.dimensions()[Geom::X], r.dimensions()[Geom::Y])/2));
+        else
+        	this->rect->setRy(true, CLAMP(this->ry, 0, r.dimensions()[Geom::Y]));
+    }
+
+    // status text
+    double rdimx = r.dimensions()[Geom::X];
+    double rdimy = r.dimensions()[Geom::Y];
+
+    Inkscape::Util::Quantity rdimx_q = Inkscape::Util::Quantity(rdimx, "px");
+    Inkscape::Util::Quantity rdimy_q = Inkscape::Util::Quantity(rdimy, "px");
+    Glib::ustring xs = rdimx_q.string(_desktop->namedview->display_units);
+    Glib::ustring ys = rdimy_q.string(_desktop->namedview->display_units);
+
+    if (state & GDK_CONTROL_MASK) {
+        int ratio_x, ratio_y;
+        bool is_golden_ratio = false;
+
+        if (fabs (rdimx) > fabs (rdimy)) {
+            if (fabs(rdimx / rdimy - goldenratio) < 1e-6) {
+                is_golden_ratio = true;
+            }
+
+            ratio_x = (int) rint (rdimx / rdimy);
+            ratio_y = 1;
+        } else {
+            if (fabs(rdimy / rdimx - goldenratio) < 1e-6) {
+                is_golden_ratio = true;
+            }
+
+            ratio_x = 1;
+            ratio_y = (int) rint (rdimy / rdimx);
+        }
+
+        if (!is_golden_ratio) {
+            this->message_context->setF(Inkscape::IMMEDIATE_MESSAGE,
+                    _("<b>Rectangle</b>: %s &#215; %s (constrained to ratio %d:%d); with <b>Shift</b> to draw around the starting point"),
+                    xs.c_str(), ys.c_str(), ratio_x, ratio_y);
+        } else {
+            if (ratio_y == 1) {
+                this->message_context->setF(Inkscape::IMMEDIATE_MESSAGE,
+                        _("<b>Rectangle</b>: %s &#215; %s (constrained to golden ratio 1.618 : 1); with <b>Shift</b> to draw around the starting point"),
+                        xs.c_str(), ys.c_str());
+            } else {
+                this->message_context->setF(Inkscape::IMMEDIATE_MESSAGE,
+                        _("<b>Rectangle</b>: %s &#215; %s (constrained to golden ratio 1 : 1.618); with <b>Shift</b> to draw around the starting point"),
+                        xs.c_str(), ys.c_str());
+            }
+        }
+    } else {
+        this->message_context->setF(Inkscape::IMMEDIATE_MESSAGE,
+                _("<b>Rectangle</b>: %s &#215; %s; with <b>Ctrl</b> to make square, integer-ratio, or golden-ratio rectangle; with <b>Shift</b> to draw around the starting point"),
+                xs.c_str(), ys.c_str());
+    }
+}
+
+void RectTool::finishItem() {
+    this->message_context->clear();
+
+    if (this->rect != nullptr) {
+        if (this->rect->width.computed == 0 || this->rect->height.computed == 0) {
+            this->cancel(); // Don't allow the creating of zero sized rectangle, for example when the start and and point snap to the snap grid point
+            return;
+        }
+
+        this->rect->updateRepr();
+        this->rect->doWriteTransform(this->rect->transform, nullptr, true);
+
+        _desktop->getSelection()->set(this->rect);
+
+        DocumentUndo::done(_desktop->getDocument(), _("Create rectangle"), INKSCAPE_ICON("draw-rectangle"));
+
+        this->rect = nullptr;
+    }
+}
+
+void RectTool::cancel(){
+    _desktop->getSelection()->clear();
+    ungrabCanvasEvents();
+
+    if (this->rect != nullptr) {
+        this->rect->deleteObject();
+        this->rect = nullptr;
+    }
+
+    this->within_tolerance = false;
+    this->xp = 0;
+    this->yp = 0;
+    this->item_to_select = nullptr;
+
+    DocumentUndo::cancel(_desktop->getDocument());
+}
+
+}
+}
+}
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :