Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/svpaint.cpp @ 21:2f43e400f144

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Provide an "all" target to build both the sdist and the wheel
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 10:28:53 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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2
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1 // Copyright 2007 Google Inc. All Rights Reserved.
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2 //
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3 // Author: Joern Wanke
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4 // Licensed under the Apache License, Version 2.0 (the "License");
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5 // you may not use this file except in compliance with the License.
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6 // You may obtain a copy of the License at
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7 // http://www.apache.org/licenses/LICENSE-2.0
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8 // Unless required by applicable law or agreed to in writing, software
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9 // distributed under the License is distributed on an "AS IS" BASIS,
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10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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11 // See the License for the specific language governing permissions and
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12 // limitations under the License.
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13 //
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14 // Simple drawing program to illustrate ScrollView capabilities.
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15 //
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16 // Functionality:
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17 // - The menubar is used to select from different sample styles of input.
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18 // - With the RMB it is possible to change the RGB values in different
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19 // popup menus.
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20 // - A LMB click either draws point-to-point, point or text.
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21 // - A LMB dragging either draws a line, a rectangle or ellipse.
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22
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23 // Include automatically generated configuration file if running autoconf.
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24 #ifdef HAVE_CONFIG_H
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25 # include "config_auto.h"
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26 #endif
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28 #ifndef GRAPHICS_DISABLED
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29 # include "scrollview.h"
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30 # include "svmnode.h"
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32 # include <cstdlib>
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33 # include <iostream>
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35 namespace tesseract {
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36
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37 // The current color values we use, initially white (== ScrollView::WHITE).
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38 static int rgb[3] = {255, 255, 255};
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39
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40 class SVPaint : public SVEventHandler {
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41 public:
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42 explicit SVPaint(const char *server_name);
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43 // This is the main event handling function that we need to overwrite, defined
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44 // in SVEventHandler.
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45 void Notify(const SVEvent *sv_event) override;
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47 private:
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48 // The Handler take care of the SVET_POPUP, SVET_MENU, SVET_CLICK and
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49 // SVET_SELECTION events.
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50 void PopupHandler(const SVEvent *sv_event);
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51 void MenuBarHandler(const SVEvent *sv_event);
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52 void ClickHandler(const SVEvent *sv_event);
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53 void SelectionHandler(const SVEvent *sv_event);
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54
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55 // Convenience functions to build little menus.
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56 SVMenuNode *BuildPopupMenu();
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57 SVMenuNode *BuildMenuBar();
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58
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59 // Our window.
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60 ScrollView *window_;
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61
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62 // The mode we are in when an SVET_CLICK or an SVET_SELECTION event occurs.
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63 int click_mode_;
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64 int drag_mode_;
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65
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66 // In the point-to-point drawing mode, we need to set a start-point the first
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67 // time we call it (e.g. call SetCursor).
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68 bool has_start_point_;
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69 };
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70
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71 // Build a sample popup menu.
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72 SVMenuNode *SVPaint::BuildPopupMenu() {
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73 auto *root = new SVMenuNode(); // Empty root node
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74 // Initial color is white, so we all values to 255.
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75 root->AddChild("R", // Shown caption.
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76 1, // assoc. command_id.
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77 "255", // initial value.
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78 "Red Color Value?"); // Shown description.
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79 root->AddChild("G", 2, "255", "Green Color Value?");
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80 root->AddChild("B", 3, "255", "Blue Color Value?");
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81 return root;
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82 }
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83
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84 // Build a sample menu bar.
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85 SVMenuNode *SVPaint::BuildMenuBar() {
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86 auto *root = new SVMenuNode(); // Empty root node
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87
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88 // Create some submenus and add them to the root.
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89 SVMenuNode *click = root->AddChild("Clicking");
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90 SVMenuNode *drag = root->AddChild("Dragging");
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91
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92 // Put some nodes into the submenus.
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93 click->AddChild("Point to Point Drawing", // Caption.
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94 1); // command_id.
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95 click->AddChild("Point Drawing", 2);
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96 click->AddChild("Text Drawing", 3);
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97 drag->AddChild("Line Drawing", 4);
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98 drag->AddChild("Rectangle Drawing", 5);
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99 drag->AddChild("Ellipse Drawing", 6);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
100 return root;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
101 }
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parents:
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102
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
103 // Takes care of the SVET_POPUP events.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
104 // In our case, SVET_POPUP is used to set RGB values.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
105 void SVPaint::PopupHandler(const SVEvent *sv_event) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
106 // Since we only have the RGB values as popup items,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
107 // we take a shortcut to not bloat up code:
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
108 rgb[sv_event->command_id - 1] = atoi(sv_event->parameter);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
109 window_->Pen(rgb[0], rgb[1], rgb[2]);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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110 }
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parents:
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111
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
112 // Takes care of the SVET_MENU events.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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113 // In our case, we change either the click_mode_ (commands 1-3)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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114 // or the drag_mode_ (commands 4-6).
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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115 void SVPaint::MenuBarHandler(const SVEvent *sv_event) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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116 if ((sv_event->command_id > 0) && (sv_event->command_id < 4)) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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117 click_mode_ = sv_event->command_id;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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118 has_start_point_ = false;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
119 } else {
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120 drag_mode_ = sv_event->command_id;
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parents:
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121 }
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parents:
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122 }
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parents:
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123
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parents:
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124 // Takes care of the SVET_CLICK events.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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125 // Depending on the click_mode_ we are in, either do Point-to-Point drawing,
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
126 // point drawing, or draw text.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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127 void SVPaint::ClickHandler(const SVEvent *sv_event) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
128 switch (click_mode_) {
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parents:
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129 case 1: // Point to Point
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parents:
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130 if (has_start_point_) {
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parents:
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131 window_->DrawTo(sv_event->x, sv_event->y);
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parents:
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132 } else {
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parents:
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133 has_start_point_ = true;
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parents:
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134 window_->SetCursor(sv_event->x, sv_event->y);
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parents:
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135 }
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parents:
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136 break;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
137 case 2: // Point Drawing..simulated by drawing a 1 pixel line.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
138 window_->Line(sv_event->x, sv_event->y, sv_event->x, sv_event->y);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
139 break;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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140 case 3: // Text
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parents:
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141 // We show a modal input dialog on our window, then draw the input and
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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142 // finally delete the input pointer.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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143 char *p = window_->ShowInputDialog("Text:");
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parents:
diff changeset
144 window_->Text(sv_event->x, sv_event->y, p);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
145 delete[] p;
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parents:
diff changeset
146 break;
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parents:
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147 }
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parents:
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148 }
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parents:
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149
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parents:
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150 // Takes care of the SVET_SELECTION events.
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parents:
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151 // Depending on the drag_mode_ we are in, either draw a line, a rectangle or
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
152 // an ellipse.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
153 void SVPaint::SelectionHandler(const SVEvent *sv_event) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
154 switch (drag_mode_) {
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parents:
diff changeset
155 // FIXME inversed x_size, y_size
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
156 case 4: // Line
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
157 window_->Line(sv_event->x, sv_event->y, sv_event->x - sv_event->x_size,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
158 sv_event->y - sv_event->y_size);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
159 break;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
160 case 5: // Rectangle
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
161 window_->Rectangle(sv_event->x, sv_event->y, sv_event->x - sv_event->x_size,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
162 sv_event->y - sv_event->y_size);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
163 break;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
164 case 6: // Ellipse
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
165 window_->Ellipse(sv_event->x - sv_event->x_size, sv_event->y - sv_event->y_size,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
166 sv_event->x_size, sv_event->y_size);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
167 break;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
168 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
169 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
170
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parents:
diff changeset
171 // The event handling function from ScrollView which we have to overwrite.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
172 // We handle CLICK, SELECTION, MENU and POPUP and throw away all other events.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
173 void SVPaint::Notify(const SVEvent *sv_event) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
174 if (sv_event->type == SVET_CLICK) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
175 ClickHandler(sv_event);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
176 } else if (sv_event->type == SVET_SELECTION) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
177 SelectionHandler(sv_event);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
178 } else if (sv_event->type == SVET_MENU) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
179 MenuBarHandler(sv_event);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
180 } else if (sv_event->type == SVET_POPUP) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
181 PopupHandler(sv_event);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
182 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
183 // throw other events away
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parents:
diff changeset
184 }
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parents:
diff changeset
185
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parents:
diff changeset
186 // Builds a new window, initializes the variables and event handler and builds
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parents:
diff changeset
187 // the menu.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
188 SVPaint::SVPaint(const char *server_name) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
189 window_ = new ScrollView("ScrollView Paint Example", // window caption
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
190 0, 0, // x,y window position
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
191 500, 500, // window size
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
192 500, 500, // canvas size
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
193 false, // whether the Y axis is inversed.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
194 // this is included due to legacy
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
195 // reasons for tesseract and enables
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
196 // us to have (0,0) as the LOWER left
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
197 // of the coordinate system.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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198 server_name); // the server address.
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199
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200 // Set the start modes to point-to-point and line drawing.
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201 click_mode_ = 1;
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202 drag_mode_ = 4;
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203 has_start_point_ = false;
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204
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205 // Bild our menus and add them to the window. The flag illustrates whether
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206 // this is a menu bar.
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207 SVMenuNode *popup_menu = BuildPopupMenu();
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208 popup_menu->BuildMenu(window_, false);
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209
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210 SVMenuNode *bar_menu = BuildMenuBar();
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211 bar_menu->BuildMenu(window_, true);
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212
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213 // Set the initial color values to White (could also be done by
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214 // passing (rgb[0], rgb[1], rgb[2]).
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215 window_->Pen(ScrollView::WHITE);
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216 window_->Brush(ScrollView::WHITE);
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217
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218 // Adds the event handler to the window. This actually ensures that Notify
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219 // gets called when events occur.
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220 window_->AddEventHandler(this);
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221
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222 // Set the window visible (calling this is important to actually render
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223 // everything. Without this call, the window would also be drawn, but the
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224 // menu bars would be missing.
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225 window_->SetVisible(true);
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226
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227 // Rest this thread until its window is destroyed.
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228 // Note that a special eventhandling thread was created when constructing
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229 // the window. Due to this, the application will not deadlock here.
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230 window_->AwaitEvent(SVET_DESTROY);
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231 // We now have 3 Threads running:
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232 // (1) The MessageReceiver thread which fetches messages and distributes them
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233 // (2) The EventHandler thread which handles all events for window_
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234 // (3) The main thread which waits on window_ for a DESTROY event (blocked)
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235 }
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236
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237 } // namespace tesseract
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238
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239 // If a parameter is given, we try to connect to the given server.
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240 // This enables us to test the remote capabilities of ScrollView.
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241 int main(int argc, char **argv) {
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242 const char *server_name;
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243 if (argc > 1) {
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244 server_name = argv[1];
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245 } else {
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246 server_name = "localhost";
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247 }
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248 tesseract::SVPaint svp(server_name);
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249 }
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250
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251 #endif // !GRAPHICS_DISABLED