juce/source/src/gui/components/layout/juce_ResizableCornerComponent.cpp

   1 /*
   2   ==============================================================================
   3
   4    This file is part of the JUCE library - "Jules' Utility Class Extensions"
   5    Copyright 2004-11 by Raw Material Software Ltd.
   6
   7   ------------------------------------------------------------------------------
   8
   9    JUCE can be redistributed and/or modified under the terms of the GNU General
  10    Public License (Version 2), as published by the Free Software Foundation.
  11    A copy of the license is included in the JUCE distribution, or can be found
  12    online at www.gnu.org/licenses.
  13
  14    JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
  15    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  16    A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  17
  18   ------------------------------------------------------------------------------
  19
  20    To release a closed-source product which uses JUCE, commercial licenses are
  21    available: visit www.rawmaterialsoftware.com/juce for more information.
  22
  23   ==============================================================================
  24 */
  25
  26 #include "../../../core/juce_StandardHeader.h"
  27
  28 BEGIN_JUCE_NAMESPACE
  29
  30 #include "juce_ResizableCornerComponent.h"
  31 #include "../juce_Desktop.h"
  32 #include "../lookandfeel/juce_LookAndFeel.h"
  33 #include "../../graphics/geometry/juce_Line.h"
  34
  35
  36 //==============================================================================
  37 ResizableCornerComponent::ResizableCornerComponent (Component* const componentToResize,
  38                                                     ComponentBoundsConstrainer* const constrainer_)
  39    : component (componentToResize),
  40      constrainer (constrainer_)
  41 {
  42     setRepaintsOnMouseActivity (true);
  43     setMouseCursor (MouseCursor::BottomRightCornerResizeCursor);
  44 }
  45
  46 ResizableCornerComponent::~ResizableCornerComponent()
  47 {
  48 }
  49
  50 //==============================================================================
  51 void ResizableCornerComponent::paint (Graphics& g)
  52 {
  53     getLookAndFeel()
  54         .drawCornerResizer (g, getWidth(), getHeight(),
  55                             isMouseOverOrDragging(),
  56                             isMouseButtonDown());
  57 }
  58
  59 void ResizableCornerComponent::mouseDown (const MouseEvent&)
  60 {
  61     if (component == nullptr)
  62     {
  63         jassertfalse; // You've deleted the component that this resizer is supposed to be controlling!
  64         return;
  65     }
  66
  67     originalBounds = component->getBounds();
  68
  69     if (constrainer != nullptr)
  70         constrainer->resizeStart();
  71 }
  72
  73 void ResizableCornerComponent::mouseDrag (const MouseEvent& e)
  74 {
  75     if (component == nullptr)
  76     {
  77         jassertfalse; // You've deleted the component that this resizer is supposed to be controlling!
  78         return;
  79     }
  80
  81     Rectangle<int> r (originalBounds.withSize (originalBounds.getWidth() + e.getDistanceFromDragStartX(),
  82                                                originalBounds.getHeight() + e.getDistanceFromDragStartY()));
  83
  84     if (constrainer != nullptr)
  85     {
  86         constrainer->setBoundsForComponent (component, r, false, false, true, true);
  87     }
  88     else
  89     {
  90         Component::Positioner* const pos = component->getPositioner();
  91
  92         if (pos != nullptr)
  93             pos->applyNewBounds (r);
  94         else
  95             component->setBounds (r);
  96     }
  97 }
  98
  99 void ResizableCornerComponent::mouseUp (const MouseEvent&)
 100 {
 101     if (constrainer != nullptr)
 102         constrainer->resizeEnd();
 103 }
 104
 105 bool ResizableCornerComponent::hitTest (int x, int y)
 106 {
 107     if (getWidth() <= 0)
 108         return false;
 109
 110     const int yAtX = getHeight() - (getHeight() * x / getWidth());
 111
 112     return y >= yAtX - getHeight() / 4;
 113 }
 114
 115
 116 END_JUCE_NAMESPACE