author | Wuzzy <Wuzzy2@mail.ru> |
Wed, 08 Aug 2018 11:19:08 +0200 | |
changeset 13639 | 73c2a669c1fd |
parent 4477 | 63a21fac8bf7 |
permissions | -rw-r--r-- |
4477
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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/* |
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* Copyright (c) 2009 Nokia Corporation. |
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*/ |
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|
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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#include "qaspectratiolayout.h" |
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|
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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QAspectRatioLayout::QAspectRatioLayout(QWidget* parent, int spacing) : QLayout(parent) { |
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init(spacing); |
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} |
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|
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QAspectRatioLayout::QAspectRatioLayout(int spacing) { |
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init(spacing); |
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} |
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|
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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QAspectRatioLayout::~QAspectRatioLayout() { |
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delete item; |
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delete lastReceivedRect; |
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delete _geometry; |
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} |
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|
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void QAspectRatioLayout::init(int spacing) { |
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item = 0; |
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lastReceivedRect = new QRect(0, 0, 0, 0); |
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_geometry = new QRect(0, 0, 0, 0); |
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setSpacing(spacing); |
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} |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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/* Adds item if place isn't already taken. */ |
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void QAspectRatioLayout::add(QLayoutItem* item) { |
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if(!hasItem()) { |
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replaceItem(item); |
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} |
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} |
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/* Adds item if place isn't already taken. */ |
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void QAspectRatioLayout::addItem(QLayoutItem* item) { |
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if(!hasItem()) { |
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replaceItem(item); |
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} |
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} |
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/* Adds widget if place isn't already taken. */ |
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void QAspectRatioLayout::addWidget(QWidget* widget) { |
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if(!hasItem()) { |
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replaceItem(new QWidgetItem(widget)); |
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} |
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} |
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/* Returns the item pointer and dereferences it here. */ |
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QLayoutItem* QAspectRatioLayout::take() { |
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QLayoutItem* item = 0; |
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if(this->hasItem()) { |
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item = this->item; |
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this->item = 0; |
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} |
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return item; |
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} |
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/* Returns the item pointer and dereferences it here. */ |
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QLayoutItem* QAspectRatioLayout::takeAt(int index) { |
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if(index != 0) { |
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return 0; |
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} |
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return this->take(); |
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} |
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/* Returns the item pointer. */ |
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QLayoutItem* QAspectRatioLayout::itemAt(int index) const { |
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if(index != 0) { |
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return 0; |
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} |
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if(hasItem()) { |
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return this->item; |
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} |
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return 0; |
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} |
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/* Checks if we have an item. */ |
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bool QAspectRatioLayout::hasItem() const { |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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81 |
return this->item != 0; |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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82 |
} |
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83 |
|
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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84 |
/* Returns the count of items which can be either 0 or 1. */ |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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85 |
int QAspectRatioLayout::count() const { |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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86 |
int returnValue = 0; |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
87 |
if(hasItem()) { |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
88 |
returnValue = 1; |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
89 |
} |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
90 |
return returnValue; |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
91 |
} |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
92 |
|
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
93 |
/* Replaces the item with the new and returns the old. */ |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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94 |
QLayoutItem* QAspectRatioLayout::replaceItem(QLayoutItem* item) { |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
95 |
QLayoutItem* old = 0; |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
96 |
if(this->hasItem()) { |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
97 |
old = this->item; |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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98 |
} |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
99 |
this->item = item; |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
100 |
setGeometry(*this->_geometry); |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
101 |
return old; |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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102 |
} |
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|
103 |
|
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
104 |
/* Tells which way layout expands. */ |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
105 |
Qt::Orientations QAspectRatioLayout::expandingDirections() const { |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
106 |
return Qt::Horizontal | Qt::Vertical; |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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107 |
} |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
108 |
|
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
109 |
/* Tells which size is preferred. */ |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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110 |
QSize QAspectRatioLayout::sizeHint() const { |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
111 |
return this->item->minimumSize(); |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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112 |
} |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
113 |
|
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114 |
/* Tells minimum size. */ |
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115 |
QSize QAspectRatioLayout::minimumSize() const { |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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116 |
return this->item->minimumSize(); |
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117 |
} |
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118 |
|
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119 |
/* |
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120 |
* Tells if heightForWidth calculations is handled. |
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121 |
* It isn't since width isn't enough to calculate |
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122 |
* proper size. |
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123 |
*/ |
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124 |
bool QAspectRatioLayout::hasHeightForWidth() const { |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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125 |
return false; |
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126 |
} |
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127 |
|
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128 |
/* Replaces lastReceivedRect. */ |
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129 |
void QAspectRatioLayout::setLastReceivedRect(const QRect& rect) { |
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130 |
QRect* oldRect = this->lastReceivedRect; |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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131 |
this->lastReceivedRect = new QRect(rect.topLeft(), rect.size()); |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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132 |
delete oldRect; |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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133 |
} |
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134 |
|
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|
135 |
/* Returns geometry */ |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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136 |
QRect QAspectRatioLayout::geometry() { |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
137 |
return QRect(*this->_geometry); |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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138 |
} |
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|
139 |
|
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
140 |
/* Sets geometry to given size. */ |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
141 |
void QAspectRatioLayout::setGeometry(const QRect& rect) { |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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142 |
/* |
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143 |
* We check if the item is set and |
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144 |
* if size is the same previously received. |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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145 |
* If either is false nothing is done. |
63a21fac8bf7
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146 |
*/ |
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147 |
if(!this->hasItem() || |
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148 |
areRectsEqual(*this->lastReceivedRect, rect)) { |
63a21fac8bf7
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149 |
return; |
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150 |
} |
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|
151 |
/* Replace the last received rectangle. */ |
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|
152 |
setLastReceivedRect(rect); |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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153 |
/* Calculate proper size for the item relative to the received size. */ |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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154 |
QSize properSize = calculateProperSize(rect.size()); |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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155 |
/* Calculate center location in the rect and with item size. */ |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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156 |
QPoint properLocation = calculateCenterLocation(rect.size(), properSize); |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
157 |
/* Set items geometry */ |
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|
158 |
this->item->setGeometry(QRect(properLocation, properSize)); |
63a21fac8bf7
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|
159 |
QRect* oldRect = this->_geometry; |
63a21fac8bf7
Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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|
160 |
/* Cache the calculated geometry. */ |
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161 |
this->_geometry = new QRect(properLocation, properSize); |
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162 |
delete oldRect; |
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163 |
/* Super classes setGeometry */ |
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164 |
QLayout::setGeometry(*this->_geometry); |
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165 |
} |
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166 |
|
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167 |
/* Takes the shortest side and creates QSize |
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168 |
* with the shortest side as width and height. */ |
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169 |
QSize QAspectRatioLayout::calculateProperSize(QSize from) const { |
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170 |
QSize properSize; |
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171 |
if(from.height() * 2 < from.width()) { |
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172 |
properSize.setHeight(from.height() - this->margin()); |
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173 |
properSize.setWidth(from.height() * 2 - this->margin()); |
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174 |
} |
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175 |
else { |
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176 |
properSize.setWidth(from.width() - this->margin()); |
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177 |
properSize.setHeight(from.width() / 2 - this->margin()); |
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178 |
} |
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179 |
return properSize; |
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180 |
} |
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181 |
|
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182 |
/* Calculates center location from the given height and width for item size. */ |
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183 |
QPoint QAspectRatioLayout::calculateCenterLocation(QSize from, |
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184 |
QSize itemSize) const { |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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185 |
QPoint centerLocation; |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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186 |
if((from.width() - itemSize.width()) > 0) { |
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Add QAspectRatioLayout borrowed from http://wiki.forum.nokia.com/index.php/CS001309_-_Maintaining_square_form_for_a_widget_in_Qt to maintain width == height * 2 aspect ratio for map drawing widget
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187 |
centerLocation.setX((from.width() - itemSize.width())/2); |
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188 |
} |
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189 |
if((from.height() - itemSize.height()) > 0) { |
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190 |
centerLocation.setY((from.height() - itemSize.height())/2); |
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191 |
} |
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192 |
return centerLocation; |
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193 |
} |
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194 |
|
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195 |
/* Compares if two QRects are equal. */ |
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196 |
bool QAspectRatioLayout::areRectsEqual(const QRect& a, |
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197 |
const QRect& b) const { |
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198 |
bool result = false; |
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199 |
if(a.x() == b.x() && |
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200 |
a.y() == b.y() && |
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201 |
a.height() == b.height() && |
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202 |
a.width() == b.width()) { |
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203 |
result = true; |
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204 |
} |
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205 |
return result; |
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206 |
} |