src/apps/deskcalc/InputTextView.cpp

   1 /*
   2  * Copyright 2006 Haiku, Inc. All Rights Reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              Stephan Aßmus, superstippi@gmx.de
   7  */
   8
   9
  10 #include "InputTextView.h"
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14
  15 #include <String.h>
  16
  17
  18 InputTextView::InputTextView(BRect frame, const char* name, BRect textRect,
  19         uint32 resizingMode, uint32 flags)
  20         :
  21         BTextView(frame, name, textRect, resizingMode, flags),
  22         fWasFocus(false)
  23 {
  24         SetWordWrap(false);
  25 }
  26
  27
  28 InputTextView::~InputTextView()
  29 {
  30 }
  31
  32
  33 void
  34 InputTextView::MouseDown(BPoint where)
  35 {
  36         // enforce the behaviour of a typical BTextControl
  37         // only let the BTextView handle mouse up/down when
  38         // it already had focus
  39         fWasFocus = IsFocus();
  40         if (fWasFocus) {
  41                 BTextView::MouseDown(where);
  42         } else {
  43                 // forward click
  44                 if (BView* view = Parent()) {
  45                         view->MouseDown(ConvertToParent(where));
  46                 }
  47         }
  48 }
  49
  50
  51 void
  52 InputTextView::MouseUp(BPoint where)
  53 {
  54         // enforce the behaviour of a typical BTextControl
  55         // only let the BTextView handle mouse up/down when
  56         // it already had focus
  57         if (fWasFocus)
  58                 BTextView::MouseUp(where);
  59 }
  60
  61
  62 void
  63 InputTextView::KeyDown(const char* bytes, int32 numBytes)
  64 {
  65         bool handled = true;
  66         if (numBytes > 0) {
  67                 switch (bytes[0]) {
  68                         case B_ESCAPE:
  69                                 // revert any typing changes
  70                                 RevertChanges();
  71                                 break;
  72                         case B_TAB:
  73                                 // skip BTextView implementation
  74                                 BView::KeyDown(bytes, numBytes);
  75                                 // fall through
  76                         case B_RETURN:
  77                                 ApplyChanges();
  78                                 break;
  79                         default:
  80                                 handled = false;
  81                                 break;
  82                 }
  83         }
  84         if (!handled)
  85                 BTextView::KeyDown(bytes, numBytes);
  86 }
  87
  88
  89 void
  90 InputTextView::MakeFocus(bool focus)
  91 {
  92         if (focus != IsFocus()) {
  93                 if (BView* view = Parent())
  94                         view->Invalidate();
  95                 BTextView::MakeFocus(focus);
  96                 if (focus)
  97                         SelectAll();
  98         }
  99 }
 100
 101
 102 status_t
 103 InputTextView::Invoke(BMessage* message)
 104 {
 105         if (!message)
 106                 message = Message();
 107
 108         if (message) {
 109                 BMessage copy(*message);
 110                 copy.AddInt64("when", system_time());
 111                 copy.AddPointer("source", (BView*)this);
 112                 return BInvoker::Invoke(&copy);
 113         }
 114         return B_BAD_VALUE;
 115 }
 116
 117
 118 // #pragma mark -
 119
 120
 121 void
 122 InputTextView::Select(int32 start, int32 finish)
 123 {
 124         BTextView::Select(start, finish);
 125
 126         _CheckTextRect();
 127 }
 128
 129
 130 void
 131 InputTextView::InsertText(const char* inText, int32 inLength, int32 inOffset,
 132         const text_run_array* inRuns)
 133 {
 134         BTextView::InsertText(inText, inLength, inOffset, inRuns);
 135
 136         _CheckTextRect();
 137 }
 138
 139
 140 void
 141 InputTextView::DeleteText(int32 fromOffset, int32 toOffset)
 142 {
 143         BTextView::DeleteText(fromOffset, toOffset);
 144
 145         _CheckTextRect();
 146 }
 147
 148
 149 // #pragma mark -
 150
 151
 152 void
 153 InputTextView::_CheckTextRect()
 154 {
 155         // update text rect and make sure
 156         // the cursor/selection is in view
 157         BRect textRect(TextRect());
 158         float width = ceilf(StringWidth(Text()) + 2.0);
 159         if (textRect.Width() < width) {
 160                 textRect.right = textRect.left + width;
 161                 SetTextRect(textRect);
 162                 ScrollToSelection();
 163         }
 164 }