source/modules/juce_gui_basics/layout/juce_StretchableLayoutResizerBar.cpp

   1 /*
   2   ==============================================================================
   3
   4    This file is part of the JUCE library.
   5    Copyright (c) 2022 - Raw Material Software Limited
   6
   7    JUCE is an open source library subject to commercial or open-source
   8    licensing.
   9
  10    By using JUCE, you agree to the terms of both the JUCE 7 End-User License
  11    Agreement and JUCE Privacy Policy.
  12
  13    End User License Agreement: www.juce.com/juce-7-licence
  14    Privacy Policy: www.juce.com/juce-privacy-policy
  15
  16    Or: You may also use this code under the terms of the GPL v3 (see
  17    www.gnu.org/licenses).
  18
  19    JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
  20    EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
  21    DISCLAIMED.
  22
  23   ==============================================================================
  24 */
  25
  26 namespace juce
  27 {
  28
  29 StretchableLayoutResizerBar::StretchableLayoutResizerBar (StretchableLayoutManager* layout_,
  30                                                           const int index,
  31                                                           const bool vertical)
  32     : layout (layout_),
  33       itemIndex (index),
  34       isVertical (vertical)
  35 {
  36     setRepaintsOnMouseActivity (true);
  37     setMouseCursor (vertical ? MouseCursor::LeftRightResizeCursor
  38                              : MouseCursor::UpDownResizeCursor);
  39 }
  40
  41 StretchableLayoutResizerBar::~StretchableLayoutResizerBar()
  42 {
  43 }
  44
  45 //==============================================================================
  46 void StretchableLayoutResizerBar::paint (Graphics& g)
  47 {
  48     getLookAndFeel().drawStretchableLayoutResizerBar (g,
  49                                                       getWidth(), getHeight(),
  50                                                       isVertical,
  51                                                       isMouseOver(),
  52                                                       isMouseButtonDown());
  53 }
  54
  55 void StretchableLayoutResizerBar::mouseDown (const MouseEvent&)
  56 {
  57     mouseDownPos = layout->getItemCurrentPosition (itemIndex);
  58 }
  59
  60 void StretchableLayoutResizerBar::mouseDrag (const MouseEvent& e)
  61 {
  62     const int desiredPos = mouseDownPos + (isVertical ? e.getDistanceFromDragStartX()
  63                                                       : e.getDistanceFromDragStartY());
  64
  65
  66     if (layout->getItemCurrentPosition (itemIndex) != desiredPos)
  67     {
  68         layout->setItemPosition (itemIndex, desiredPos);
  69         hasBeenMoved();
  70     }
  71 }
  72
  73 void StretchableLayoutResizerBar::hasBeenMoved()
  74 {
  75     if (Component* parent = getParentComponent())
  76         parent->resized();
  77 }
  78
  79 } // namespace juce