b42f1cf01d
* Add 45-multiple degree adjustment for line, arrow and marker tools * Adjustment: Ctrl press is checked + widened functionality for two-point tools
136 lines
3.7 KiB
C++
136 lines
3.7 KiB
C++
// Copyright(c) 2017-2019 Alejandro Sirgo Rica & Contributors
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//
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// This file is part of Flameshot.
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//
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// Flameshot is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Flameshot is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Flameshot. If not, see <http://www.gnu.org/licenses/>.
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#include "abstracttwopointtool.h"
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#include <cmath>
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namespace {
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const double ADJ_UNIT = std::atan(1.0);
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const int DIRS_NUMBER = 4;
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enum UNIT {
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HORIZ_DIR = 0,
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DIAG1_DIR = 1,
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VERT_DIR = 2,
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DIAG2_DIR = 3
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};
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const double ADJ_DIAG_UNIT = 2 * ADJ_UNIT;
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const int DIAG_DIRS_NUMBER = 2;
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enum DIAG_UNIT {
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DIR1 = 0,
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DIR2 = 1
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};
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}
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AbstractTwoPointTool::AbstractTwoPointTool(QObject *parent) :
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CaptureTool(parent), m_thickness(0), m_padding(0)
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{
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}
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bool AbstractTwoPointTool::isValid() const {
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return (m_points.first != m_points.second);
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}
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bool AbstractTwoPointTool::closeOnButtonPressed() const {
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return false;
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}
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bool AbstractTwoPointTool::isSelectable() const {
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return true;
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}
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bool AbstractTwoPointTool::showMousePreview() const {
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return true;
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}
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void AbstractTwoPointTool::undo(QPixmap &pixmap) {
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QPainter p(&pixmap);
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p.drawPixmap(backupRect(pixmap.rect()).topLeft(), m_pixmapBackup);
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}
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void AbstractTwoPointTool::drawEnd(const QPoint &p) {
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Q_UNUSED(p);
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}
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void AbstractTwoPointTool::drawMove(const QPoint &p) {
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m_points.second = p;
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}
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void AbstractTwoPointTool::drawMoveWithAdjustment(const QPoint &p) {
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m_points.second = m_points.first + adjustedVector(p - m_points.first);
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}
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void AbstractTwoPointTool::colorChanged(const QColor &c) {
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m_color = c;
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}
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void AbstractTwoPointTool::thicknessChanged(const int th) {
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m_thickness = th;
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}
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void AbstractTwoPointTool::updateBackup(const QPixmap &pixmap) {
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m_pixmapBackup = pixmap.copy(backupRect(pixmap.rect()));
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}
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QRect AbstractTwoPointTool::backupRect(const QRect &limits) const {
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QRect r = QRect(m_points.first, m_points.second).normalized();
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const int val = m_thickness + m_padding;
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r += QMargins(val, val, val, val);
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return r.intersected(limits);
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}
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QPoint AbstractTwoPointTool::adjustedVector(QPoint v) const {
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if (m_supportsOrthogonalAdj && m_supportsDiagonalAdj) {
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int dir = ( static_cast<int>(round(atan2(-v.y(), v.x()) / ADJ_UNIT)) + DIRS_NUMBER ) % DIRS_NUMBER;
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if (dir == UNIT::HORIZ_DIR) {
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v.setY(0);
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} else if (dir == UNIT::VERT_DIR) {
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v.setX(0);
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} else if (dir == UNIT::DIAG1_DIR) {
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int newX = (v.x() - v.y()) / 2;
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int newY = -newX;
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v.setX(newX);
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v.setY(newY);
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} else {
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int newX = (v.x() + v.y()) / 2;
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int newY = newX;
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v.setX(newX);
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v.setY(newY);
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}
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} else if (m_supportsDiagonalAdj) {
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int dir = ( static_cast<int>(round((atan2(-v.y(), v.x()) - ADJ_DIAG_UNIT / 2) / ADJ_DIAG_UNIT))
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+ DIAG_DIRS_NUMBER ) % DIAG_DIRS_NUMBER;
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if (dir == DIAG_UNIT::DIR1) {
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int newX = (v.x() - v.y()) / 2;
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int newY = -newX;
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v.setX(newX);
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v.setY(newY);
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} else {
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int newX = (v.x() + v.y()) / 2;
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int newY = newX;
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v.setX(newX);
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v.setY(newY);
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}
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}
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return v;
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}
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