|
253
|
1 /*
|
|
|
2 * Copyright (C) 2016 The Qt Company Ltd.
|
|
|
3 * Contact: https://www.qt.io/licensing/
|
|
|
4 *
|
|
|
5 * This file is part of the QtCore module of the Qt Toolkit.
|
|
|
6 *
|
|
|
7 * "Redistribution and use in source and binary forms, with or without
|
|
|
8 * modification, are permitted provided that the following conditions are
|
|
|
9 * met:
|
|
|
10 * * Redistributions of source code must retain the above copyright
|
|
|
11 * notice, this list of conditions and the following disclaimer.
|
|
|
12 * * Redistributions in binary form must reproduce the above copyright
|
|
|
13 * notice, this list of conditions and the following disclaimer in
|
|
|
14 * the documentation and/or other materials provided with the
|
|
|
15 * distribution.
|
|
|
16 * * Neither the name of The Qt Company Ltd nor the names of its
|
|
|
17 * contributors may be used to endorse or promote products derived
|
|
|
18 * from this software without specific prior written permission.
|
|
|
19 *
|
|
|
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
|
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
|
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
|
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
|
24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
|
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
|
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
|
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
|
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
|
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
|
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
|
|
|
31 */
|
|
|
32 #include "gui/layouts/flow_layout.h"
|
|
|
33
|
|
|
34 #include <QWidget>
|
|
|
35
|
|
|
36 #include <algorithm>
|
|
|
37
|
|
|
38 FlowLayout::FlowLayout(QWidget *parent, int margin, int hSpacing, int vSpacing)
|
|
|
39 : QLayout(parent), _horiz_space(hSpacing), _vert_space(vSpacing) {
|
|
|
40 setContentsMargins(margin, margin, margin, margin);
|
|
|
41 }
|
|
|
42
|
|
|
43 FlowLayout::FlowLayout(int margin, int hSpacing, int vSpacing)
|
|
|
44 : _horiz_space(hSpacing), _vert_space(vSpacing) {
|
|
|
45 setContentsMargins(margin, margin, margin, margin);
|
|
|
46 }
|
|
|
47
|
|
|
48 FlowLayout::~FlowLayout() {
|
|
|
49 while (count())
|
|
|
50 delete takeAt(0);
|
|
|
51 }
|
|
|
52
|
|
|
53 void FlowLayout::addItem(QLayoutItem *item) {
|
|
|
54 item_list.append(item);
|
|
|
55 }
|
|
|
56
|
|
|
57 int FlowLayout::horizontalSpacing() const {
|
|
|
58 return (_horiz_space >= 0) ? _horiz_space : smartSpacing(QStyle::PM_LayoutHorizontalSpacing);
|
|
|
59 }
|
|
|
60
|
|
|
61 int FlowLayout::verticalSpacing() const {
|
|
|
62 return (_vert_space >= 0) ? _vert_space : smartSpacing(QStyle::PM_LayoutVerticalSpacing);
|
|
|
63 }
|
|
|
64
|
|
|
65 int FlowLayout::count() const {
|
|
|
66 return item_list.size();
|
|
|
67 }
|
|
|
68
|
|
|
69 QLayoutItem* FlowLayout::itemAt(int index) const {
|
|
|
70 return item_list.value(index);
|
|
|
71 }
|
|
|
72
|
|
|
73 QLayoutItem* FlowLayout::takeAt(int index) {
|
|
|
74 return (index >= 0 && index < item_list.size()) ? item_list.takeAt(index) : nullptr;
|
|
|
75 }
|
|
|
76
|
|
|
77 Qt::Orientations FlowLayout::expandingDirections() const
|
|
|
78 {
|
|
|
79 return {};
|
|
|
80 }
|
|
|
81
|
|
|
82 bool FlowLayout::hasHeightForWidth() const {
|
|
|
83 return true;
|
|
|
84 }
|
|
|
85
|
|
|
86 int FlowLayout::heightForWidth(int width) const {
|
|
|
87 return doLayout(QRect(0, 0, width, 0), true);
|
|
|
88 }
|
|
|
89
|
|
|
90 void FlowLayout::setGeometry(const QRect &rect) {
|
|
|
91 QLayout::setGeometry(rect);
|
|
|
92 doLayout(rect, false);
|
|
|
93 }
|
|
|
94
|
|
|
95 QSize FlowLayout::sizeHint() const {
|
|
|
96 return minimumSize();
|
|
|
97 }
|
|
|
98
|
|
|
99 QSize FlowLayout::minimumSize() const {
|
|
|
100 QSize size;
|
|
|
101 for (QLayoutItem* item : item_list)
|
|
|
102 size = size.expandedTo(item->minimumSize());
|
|
|
103
|
|
|
104 const QMargins margins = contentsMargins();
|
|
|
105 size += QSize(margins.left() + margins.right(), margins.top() + margins.bottom());
|
|
|
106 return size;
|
|
|
107 }
|
|
|
108
|
|
|
109 int FlowLayout::doLayout(const QRect &rect, bool test) const {
|
|
|
110 int left, top, right, bottom;
|
|
|
111 getContentsMargins(&left, &top, &right, &bottom);
|
|
|
112 QRect effectiveRect = rect.adjusted(+left, +top, -right, -bottom);
|
|
|
113
|
|
|
114 int x = effectiveRect.x();
|
|
|
115 int y = effectiveRect.y();
|
|
|
116 int line_height = 0;
|
|
|
117
|
|
|
118 for (QLayoutItem* item : item_list) {
|
|
|
119 const QWidget* wid = item->widget();
|
|
|
120 int horiz_space = horizontalSpacing();
|
|
|
121 if (horiz_space == -1)
|
|
|
122 horiz_space = wid->style()->layoutSpacing(QSizePolicy::PushButton, QSizePolicy::PushButton, Qt::Horizontal);
|
|
|
123
|
|
|
124 int vert_space = verticalSpacing();
|
|
|
125 if (vert_space == -1)
|
|
|
126 vert_space = wid->style()->layoutSpacing(QSizePolicy::PushButton, QSizePolicy::PushButton, Qt::Vertical);
|
|
|
127
|
|
|
128 int next_x = x + item->sizeHint().width() + horiz_space;
|
|
|
129 if ((next_x - horiz_space > effectiveRect.right()) && (line_height > 0)) {
|
|
|
130 x = effectiveRect.x();
|
|
|
131 y = y + line_height + vert_space;
|
|
|
132 next_x = x + item->sizeHint().width() + horiz_space;
|
|
|
133 line_height = 0;
|
|
|
134 }
|
|
|
135
|
|
|
136 if (!test)
|
|
|
137 item->setGeometry(QRect(QPoint(x, y), item->sizeHint()));
|
|
|
138
|
|
|
139 x = next_x;
|
|
|
140 line_height = std::max(line_height, item->sizeHint().height());
|
|
|
141 }
|
|
|
142
|
|
|
143 return y + line_height - rect.y() + bottom;
|
|
|
144 }
|
|
|
145
|
|
|
146 int FlowLayout::smartSpacing(QStyle::PixelMetric pm) const {
|
|
|
147 QObject *parent = this->parent();
|
|
|
148 if (!parent) {
|
|
|
149 return -1;
|
|
|
150 } else if (parent->isWidgetType()) {
|
|
|
151 QWidget *pw = static_cast<QWidget *>(parent);
|
|
|
152 return pw->style()->pixelMetric(pm, nullptr, pw);
|
|
|
153 } else {
|
|
|
154 return static_cast<QLayout *>(parent)->spacing();
|
|
|
155 }
|
|
|
156 }
|
